CALGreen · California Green Building Standards Code (CALGreen)
What are 'submeter' and 'metering faucet' as defined in Chapter 2?
In CALGreen Chapter 2 (**§ 202**), a **Metering Faucet** is defined as a self‑closing faucet that delivers a specific volume per actuation (used in CALGreen water‑use worksheets at **0.20 gal/cycle** for nonresidential baselines), and a **Submeter** is any meter installed subordinate to the main site meter; CALGreen then uses those terms in the water‑metering requirements that set when submeters are required (for example **>100 gal/day** per tenant in large buildings and **>1,000 gal/day** for excess consumption).
Last reviewed: July 6, 2026
What the code requires — 2–4 sentences
Chapter 2 defines the terms used throughout CALGreen; in particular § 202 gives the Chapter‑2 definitions used by the rest of the code. CALGreen defines Metering Faucet as a self‑closing faucet that dispenses a specific volume per actuation cycle, and the term Submeter (used throughout the water‑metering requirements) refers to a meter installed subordinate to a site meter. See § 202 for the Chapter‑2 definitions and the water‑use sections that apply these terms in practice.
A Metering Faucet is a self‑closing faucet that delivers a specific volume each time it is actuated; a Submeter is any meter installed downstream of (subordinate to) the site meter.
Requirements in detail
Definitions (plain language, grounded in § 202)
- Metering Faucet — a self‑closing faucet that dispenses a specific volume of water for each actuation (the per‑cycle volume or the cycle duration may be fixed or adjustable). § 202 defines this term for CALGreen use.
- Submeter — a meter installed subordinate to a site meter (often called a dedicated meter). The same wording appears in the plumbing code definitions that CALGreen references.
Where the definitions matter (how the code uses them)
- CALGreen requires separate submeters for tenant spaces and certain systems in large buildings: see § 5.303.1.1 and § 5.303.1.2 for the thresholds and placement triggers.
- CALGreen’s nonresidential baseline and worksheets use a per‑cycle volume for metering faucets when calculating baseline water use (the CALGreen workbook/appendix lists 0.20 gallons per cycle for metering faucets in the nonresidential baseline).
Quick decision table (decision‑relevant dimensions / values)
| Item | Decision‑relevant value / threshold | When it applies | Code Reference |
|---|---|---|---|
| Definition: Metering Faucet | Self‑closing; dispenses a specific volume per actuation (volume or duration fixed/adjustable) | All CALGreen uses of the term | § 202 |
| Baseline volume for nonresidential metering faucets | 0.20 gallons per cycle (used in CALGreen baseline worksheets) | CALGreen nonresidential baseline / worksheets | § A5.303.2.2 (Worksheet / Table in Appendix) |
| Definition: Submeter | A meter installed subordinate to a site meter (dedicated meter) | All CALGreen/plumbing uses of the term | § 202 (term listing) and plumbing code definition |
| Tenant submeter trigger (new bldgs/additions >50,000 sq ft) | > 100 gal/day (380 L/day) projected use per tenant | Requires separate submeter for individual tenant spaces | § 5.303.1.1(1) |
| Excess consumption submeter trigger | > 1,000 gal/day projected use per tenant | Requires submeter or metering device for that tenant | § 5.303.1.2 |
| Hot‑water submeter downstream limits | Maximum branch volumes downstream of hot‑water submeters (e.g., 16 oz condition; 32 oz to each fixture in some configurations) | When hot‑water distribution has submeters (Plumbing Appendix rules) | § L502.7.3 (Plumbing Code Appendix L) |
Notes on the numeric values
- The CALGreen nonresidential baseline uses 0.20 gal/cycle for metering faucets in its worksheets and tables. Use that value when calculating baseline water use under CALGreen worksheets.
- The California Plumbing Code (Appendix L) includes its own table(s) and values for maximum fixture flows in other contexts (some tables list 0.25 gal/cycle for metering faucets in certain plumbing appendices). Where two published code documents show different numeric limits, apply the requirement appropriate to the compliance path and the adopting agency; be sure to document which table/appendix you used for compliance.
Exceptions & special cases
- Where separate submeters for individual tenants are unfeasible, CALGreen allows submetering of specific subsystems instead (for example, cooling tower makeup water, evaporative coolers above certain flows, or large boilers) — see § 5.303.1.1(2) for the subsystem exceptions and flow thresholds.
- Hot‑water distribution submeters: Appendix L has special placement and volume limits to prevent excessive run‑out and to ensure accurate hot‑water submetering; e.g., submeters on circulation loops must meet the L502.7.3 requirements for downstream volume and pump/trace arrangements. These are plumbing‑code specifics that interact with CALGreen submetering requirements.
If a precise CALGreen Chapter‑2 text for Submeter is not visible in the copy you are using, the plumbing code defines the same term as “a meter installed subordinate to a site meter” — confirm the local adopted text before final design.
Common mistakes
- Treating a metering faucet as a gpm flow‑rate device (e.g., an aerator) — a metering faucet is measured by gallons per cycle, not gpm. Use the per‑cycle volume in CALGreen worksheets.
- Missing the 100 gal/day and 1,000 gal/day thresholds for submeter triggers when designing submeters for large buildings — those thresholds are the most common determiners of whether tenant submetering is required.
- Installing submeters for hot water without respecting the Plumbing Appendix limits on downstream volume and submeter location (L502.7.3), which can cause noncompliance or inaccurate measurements.
Worked example — applied to a concrete scenario
Scenario: You are designing a new commercial building ( > 50,000 ft² ) with a tenant that will operate a small café.
CALGreen check: Because the building is a new building over 50,000 ft², review § 5.303.1.1 requirements. If the café is projected to consume more than 100 gal/day (380 L/day), a separate submeter must be installed for that tenant. Suppose the café projection is 120 gal/day — install a tenant submeter. § 5.303.1.1(1) applies.
Restroom fixtures: The building designer chooses metering faucets in public restrooms. For CALGreen baseline calculations use 0.20 gal/cycle per metering faucet (the CALGreen nonresidential worksheet value). If each faucet is expected to be actuated 3 times/day, each faucet contributes: 0.20 gal/cycle × 3 cycles/day = 0.6 gal/day. For 10 faucets the daily total = 10 × 0.6 = 6 gallons/day. Use the CALGreen worksheet (WS‑1 / Table A5.303.2.2) when compiling baseline water use.
Hot‑water submeter consideration: If you put a submeter on a hot‑water circulation branch, check L502.7.3 for maximum permitted volume downstream of the submeter (e.g., the 16 oz / 32 oz limits and distance/trace requirements) to ensure accurate hot water measurement and compliance.
Related provisions (CALGreen / referenced code)
- § 202 — Chapter 2 definitions (Metering Faucet, Submeter listed).
- § 5.302.1 — Cross‑reference that definitions in Chapter 2 are used in Division 5.3 (water efficiency).
- § 5.303.1.1 — Submetering requirements for new buildings/additions > 50,000 ft² (the >100 gal/day tenant trigger and subsystem options).
- § 5.303.1.2 — Excess consumption submeter trigger (>1,000 gal/day).
- § A5.303.2.2 (Appendix table / WS‑1) — CALGreen baseline worksheet values including 0.20 gal/cycle for metering faucets (used for baseline water‑use calculations).
- § L502.7.3 (California Plumbing Code, Appendix L) — Hot‑water submeter placement and maximum downstream volume limits (interacts with CALGreen submetering).
- Plumbing‑code tables (e.g., Table L402.1) — show metering faucet flow/volume values used in mechanical/plumbing compliance contexts (note these can differ from CALGreen appendix baseline values).
Code references
Grounded in the retrieved California Green Building Standards Code (CALGreen) — click a citation to read the verbatim passage:
CALGreen § 301.1 High relevance — show source text
301.1||||||||X||||||||||||||| |5.302.1 Definitions||||||||X||||||||||||||| |5.303.3.1||||||||X||||||||||||||| |5.303.3.2||||||||X||||||||||||||| |5.303.3.3||||||||X||||||||||||||| |5.303.3.4||||||||X||||||||||||||| |5.303.6||||||||X||||||||||||||| |5.304.6 and subsections||†||||||X|||||||||||||||
The state agency does not adopt sections identified by the following symbol: †.
2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 5-17
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5-18 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE
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5 NONRESIDENTIAL MANDATORY MEASURES
DIVISION 5.3 – WATER EFFICIENCY AND CONSERVATION
SECTION 5.301—GENERAL
5.301.1 Scope. The provisions of this chapter shall establish the means of conserving water used indoors, outdoors and in wastewater conveyance.
SECTION 5.302—DEFINITIONS
5.302.1 Definitions. The following terms are defined in Chapter 2. EVAPOTRANSPIRATION ADJUSTMENT FACTOR (ETAF).
GRAYWATER.
METERING FAUCET.
MODEL WATER EFFICIENT LANDSCAPE ORDINANCE (MWELO).
POTABLE WATER.
SPECIAL LANDSCAPE AREA (SLA). [DSA-SS]
SUBMETER.
SECTION 5.303—INDOOR WATER USE
5.303.1 Meters. Separate submeters or metering devices shall be installed for the uses described in Sections 5.303.1.1 and 5.303.1.2. 5.303.1.1 New buildings or additions in excess of 50,000 square feet. Separate submeters shall be installed as follows:
- For each individual leased, rented or other tenant space within the building projected to consume more than 100 gal/day (380 L/day), including, but not limited to, spaces used for laundry or cleaners, restaurant or food service, medical or dental office, laboratory, or beauty salon or barber shop.
- Where separate submeters for individual building tenants are unfeasible, for water supplied to the following subsystems: a. Makeup water for cooling towers where flow through is greater than 500 gpm (30 L/s). b. Makeup water for evaporative coolers greater than 6 gpm (0.04 L/s). c. Steam and hot-water boilers with energy input more than 500,000 Btu/h (147 kW). 5.303.1.2 Excess consumption. A separate submeter or metering device shall be provided for any tenant within a new building or within an addition that is projected to consume more than 1,000 gal/day.
5.303.2 Reserved.
CALGreen § 301.1 High relevance — show source text
2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-17
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APPENDIX A5-18 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE
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A5 NONRESIDENTIAL VOLUNTARY MEASURES
DIVISION A5.3 – WATER EFFICIENCY AND CONSERVATION
SECTION A5.301—GENERAL
A5.301.1 Scope.
SECTION A5.302—DEFINITIONS
A5.302.1 Definitions. The following words and terms shall, for the purposes of this chapter and as used elsewhere in this code, have the meanings shown herein.
COMPACT DISHWASHER.
GRAYWATER.
MODEL WATER EFFICIENT LANDSCAPE ORDINANCE.
PLANTS.
POTABLE WATER.
RECYCLED WATER.
STANDARD DISHWASHER.
SUBMETER.
SECTION A5.303—INDOOR WATER USE
TABLE A5.303.2.2—WATER USE BASELINE (PERFORMANCE METHOD)3 Col2 Col3 Col4 Col5 FIXTURE TYPE BASELINE FLOW RATE DURATION DAILY USES OCCUPANTS2 Showerheads 1.8 gpm @ 80 psi 5 min. 1 X2a Lavatory faucets nonresidential 0.5 gpm @ 60 psi .25 min. 3 X Kitchen faucets 1.8 gpm @ 60 psi 4 min. 1 X2b Replacement aerators 2 gpm @ 60 psi X Wash fountains 1.8 gpm/20 [rim space (in.) @ 60 psi] X Metering faucets 0.20 gallons/cycle .25 min. 3 X Metering faucets for wash fountains 0.20 gallons/cycle/20 [rim space (in.) @ 60 psi] .25 min. 1 male1
3 femaleX Gravity tank type water closets 1.28 gallons/flush 1 flush 1 male1
3 femaleX Flushometer tank water closets 1.28 gallons/flush 1 flush 1 male1
3 femaleX Flushometer valve water closets 1.28 gallons/flush 1 flush 1 male1
3 femaleX Electromechanical hydraulic water
closets1.28 gallons/flush 1 flush 1 male1
3 femaleX Urinals 0.5 or 0.1254 gallons/flush 1 flush 2 male X 1. The daily use number shall be increased to three if urinals are not installed in the room.
2. Refer to Table 4-1, Chapter 4, 2025_California Plumbing Code_, for occupant load factors.
a.CALGreen § 407.2.3 High relevance — show source text
407.2.3 Lavatory Faucets in Common and Public Use Areas. [HCD 1 & HCD 2] The maximum flow rate of lavatory faucets, installed in common and public use areas (outside of dwellings or sleeping units) in residen- tial buildings, shall not exceed 0.5 gallons (1.89 L) per minute at 60 psi.
407.2.4 Metering Faucets. Metered faucets shall deliver a maximum of 0.2 gallons ( 0.76 L) per metering cycle.
407.2.4.1 Metering Faucets. [BSC-CG & DSA- SS] Metering Faucets shall not deliver more than 0.20 gallons (0.76 L) per cycle in compliance with Chapter 5, Division 5.3 of the California Green Building Standards Code (CALGreen).
407.3 Limitation of Hot Water Temperature for Public Lavatories. Hot water delivered from public-use lavatories shall be limited to a maximum temperature of 120°F (49°C). The maximum temperature shall be regulated by one of the following means:
(1) A limiting device conforming to either ASSE 1070/ASME A112.1070/CSA B125.70, or
(2) A water heater conforming to ASSE 1084.
407.4 Transient Public Lavatories. Self-closing or metering faucets shall be installed on lavatories intended to serve the transient public, such as those in, but not limited to service stations, train stations, airports, restaurants, and convention halls.
407.5 Waste Outlet. Lavatories shall have a waste outlet and fixture tailpiece not less than 1 [1] ⁄ 4 inches (32 mm) in diameter. Continuous wastes and fixture tailpieces shall be constructed from the materials specified in Section 701.4. Waste outlets shall be provided with an approved stopper or strainer.
407.6 Overflow. Where overflows are provided, they shall be installed in accordance with Section 404.2.
408.0 Showers.
408.1 Application. Manufactured shower receptors and shower bases shall comply with ASME A112.19.1/CSA B45.2, ASME A112.19.2/CSA B45.1, ASME A112.19.3/CSAB45.4, CSA B45.12/IAPMO Z402, or CSA B45.5/IAPMO Z124. Prefabricated shower enclosures shall comply with IAPMO IGC 154.
CALGreen § 502.7.3 Medium relevance — show source text
L 502.7.3 Hot Water System Submeters. Where a hot water pipe from a circulation loop or electric heat trace line is equipped with a submeter, the hot water distribution system downstream of the submeter shall have either an end-of-line hot water circulation pump or shall be electrically heat traced. The maximum volume of water in a branch from the circulation loop or electric heat trace line downstream of the submeter shall not exceed 16 oz (473 mL).
Where there is no circulation loop or electric heat traced line downstream of the submeter, the submeter shall be located within 2 feet (610 mm) of the central hot water system; or the branch line to the submeter shall be circulated or heat traced to within 2 feet (610 mm) of the submeter. The maximum volume from the submeter to each fixture shall not exceed 32 oz (946 mL).
The circulation pump controls shall comply with the provisions of Section L 501.4.
L 503.0 Service Hot Water – Other Than Low-Rise Residential Buildings.
L 503.1 General. The service hot water, other than singlefamily houses, multifamily structures of three stories or fewer above grade, and modular houses shall comply with this section.
L 503.1.1 New Buildings. Service water-heating systems and equipment shall comply with the requirements of this section as described in Section L 503.2.
[ASHRAE 90.1:7.1.1.1]
L 503.1.2 Additions to Existing Buildings. Service water heating systems and equipment shall comply with the requirements of this section.
Exception: Where the service water-heating to an addition is provided by existing service water-heating systems and equipment, such systems and equipment shall not be required to be in accordance with this appendix. However, new systems or equipment installed shall be in accordance with specific requirements applicable to those systems and equipment. [ASHRAE 90.1:7.1.1.2]
L 503.1.3 Alterations to Existing Buildings. Building service water-heating equipment installed as a direct replacement for existing building service water-heating equipment shall be in accordance with the requirements of Section L 503.0 applicable to the equipment being replaced. New and replacement piping shall comply with Section L 503.3.3.
Exception: Compliance shall not be required where there is insufficient space or access to meet these requirements. [ASHRAE 90.1:7.1.1.3]
L 503.2 Compliance Paths. Service water heating systems and equipment shall comply with Section L 503.2.1 and Section L 503.2.2.
L 503.2.1 Requirements for All Compliance Paths. Service water heating systems and equipment shall comply with Section L 503.1, Section L 503.3, and Section L 503.5. [ASHRAE 90.1:7.2.1]
TABLE L 502.7.1 WATER VOLUME FOR DISTRIBUTION PIPING MATERIALS* Col2 Col3 Col4 Col5 Col6 Col7 Col8 Col9 Col10 Col11 Col12 Col13 Col14 Col15 OUNCES OF WATER PER FOOT LENGTH OF PIPING **OUNCES OF WATER PER FOOT LENGTH OF CALGreen § 1.5 Medium relevance — show source text
LIFE CYCLE INVENTORY (LCI). A process of quantifying energy and raw material requirements, atmospheric emissions, waterborne emissions, solid wastes and other releases for the entire life cycle of a product, process or activity, including a whole building.
LONG RADIUS ELBOW. Pipe fitting installed between two lengths of pipe or tubing to allow a change of direction, with a radius 1.5 times the pipe diameter.
LONG-TERM SYSTEM COST (LSC). [CEC] The CEC-projected present value of costs to California’s energy systems over a period of 30 years. LSC does not represent a prediction of individual utility bills.
LOW-GWP REFRIGERANT. A compound used as a heat transfer fluid or gas that: (A) has a GWP value less than 150, and (B) is not an ozone depleting substance as defined in Title 40 of the Code of Federal Regulations, Part 82, §82.3 (as amended March 10, 2009).
LOW IMPACT DEVELOPMENT (LID). Control of stormwater at its source to mimic drainage services provided by an undisturbed site.
LOW POWER LEVEL 2 ELECTRIC VEHICLE (EV) CHARGING RECEPTACLE. [BSC-CG, DSA-SS, HCD] A 208/240-volt 20-ampere minimum branch circuit and a receptacle.
LOW-RISE RESIDENTIAL BUILDING. For the purpose of CALGreen, any building that is of Occupancy Group R and is three stories or less.
MATURE TREE CANOPY. [BSC-CG] The top of the mature trees or vegetation typical of a region.
MAXIMUM INCREMENTAL REACTIVITY (MIR). The maximum change in weight of ozone formed by adding a compound to the “Base Reactive Organic Gas (ROG) Mixture” per weight of compound added, expressed to hundredths of a gram (g O [3] / g ROC). Note: MIR values for individual compounds and hydrocarbon solvents are specified in CCR, Title 17, Sections 94700 and 94701.
MERV Filter minimum efficiency reporting value.
METERING FAUCET. A self-closing faucet that dispenses a specific volume of water for each actuation cycle. The volume or cycle duration can be fixed or adjustable.
MODEL WATER EFFICIENT LANDSCAPE ORDINANCE (MWELO) [BSC-CG & DSA-SS] A California regulation commencing with Section 490 of Chapter 2.7, Division 2, Title 23, California Code of Regulations . The MWELO regulation establishes a structure for planning, designing, installing, maintaining and managing water efficient landscapes in new construction and rehabilitated projects.
MODEL WATER EFFICIENT LANDSCAPE ORDINANCE (MWELO). [HCD] The California model ordinance (California Code of Regulations, Title 23, Division 2, Chapter 2.7), regulating landscape design, installation and maintenance practices. Local agencies are required to adopt the updated MWELO, or adopt a local ordinance at least as effective as the MWELO.
2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 2-7
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DEFINITIONS
MOISTURE CONTENT. The weight of the water in wood expressed in percentage of the weight of the oven-dry wood.
CALGreen § 5.303 Medium relevance — show source text
GRAYWATER.
METERING FAUCET.
MODEL WATER EFFICIENT LANDSCAPE ORDINANCE (MWELO).
POTABLE WATER.
SPECIAL LANDSCAPE AREA (SLA). [DSA-SS]
SUBMETER.
SECTION 5.303—INDOOR WATER USE
5.303.1 Meters. Separate submeters or metering devices shall be installed for the uses described in Sections 5.303.1.1 and 5.303.1.2. 5.303.1.1 New buildings or additions in excess of 50,000 square feet. Separate submeters shall be installed as follows:
- For each individual leased, rented or other tenant space within the building projected to consume more than 100 gal/day (380 L/day), including, but not limited to, spaces used for laundry or cleaners, restaurant or food service, medical or dental office, laboratory, or beauty salon or barber shop.
- Where separate submeters for individual building tenants are unfeasible, for water supplied to the following subsystems: a. Makeup water for cooling towers where flow through is greater than 500 gpm (30 L/s). b. Makeup water for evaporative coolers greater than 6 gpm (0.04 L/s). c. Steam and hot-water boilers with energy input more than 500,000 Btu/h (147 kW). 5.303.1.2 Excess consumption. A separate submeter or metering device shall be provided for any tenant within a new building or within an addition that is projected to consume more than 1,000 gal/day.
5.303.2 Reserved.
5.303.3 Water conserving plumbing fixtures and fittings. Plumbing fixtures (water closets and urinals) and fittings (faucets and showerheads) shall comply with the following: 5.303.3.1 Water closets. The effective flush volume of all water closets shall not exceed 1.28 gallons per flush. Tank-type water closets shall be certified to the performance criteria of the US EPA WaterSense Specification for Tank-Type Toilets. Note: The effective flush volume of dual flush toilets is defined as the composite, average flush volume of two reduced flushes and one full flush.
5.303.3.2 Urinals.
5.303.3.2.1 Wall-mounted urinals. The effective flush volume of wall-mounted urinals shall not exceed 0.125 gallons per flush.
5.303.3.2.2 Floor-mounted urinals. The effective flush volume of floor-mounted or other urinals shall not exceed 0.5 gallons per flush.
5.303.3.3 Showerheads.
5.303.3.3.1 Single showerhead. Showerheads shall have a maximum flow rate of not more than 1.8 gallons per minute at 80 psi. Showerheads shall be certified to the performance criteria of the US EPA WaterSense Specification for Showerheads. 5.303.3.3.2 Multiple showerheads serving one shower. When a shower is served by more than one showerhead, the combined flow rate of all showerheads and/or other shower outlets controlled by a single valve shall not exceed 1.8 gallons per minute at 80 psi, or the shower shall be designed to allow only one shower outlet to be in operation at a time.
Note: A hand-held shower shall be considered a showerhead.
5.303.3.4 Faucets and fountains.
CALGreen § 90.1 Medium relevance — show source text
Maintenance. The upkeep of property or equipment by the owner of the property in compliance with the requirements of this appendix.
Metering Faucet. A self-closing faucet that dispenses a specific volume of water for each actuation cycle. The volume or cycle duration can be fixed or adjustable.
Modified Evapotranspiration. Numeric values, expressed in inches/hour (in/h), of evapotranspiration rates, derived by altering ETo rates by applying factors of specific needs of the vegetation and local climate conditions. Modified evapotranspiration rates are used as a factor in estimating the irrigation water needs of landscapes. Common usage includes reference evapotranspiration as the base rate, modified by coefficients or factors for specific plant types and densities.
Multi-Occupant Spaces. Indoor spaces used for presentations and training, including classrooms and conference
rooms.
On-Site Renewable Energy. Energy generated from renewable sources produced at the building site. [ASHRAE 90.1:3.2]
Pre-Rinse Spray Valve. A handheld device for use with commercial dishwashing and ware washing equipment that sprays water on dishes, flatware, and other food service items for the purpose of removing food residue before cleaning and sanitizing the items.
Precipitation Rate. The sprinkler head application rate of water applied to landscape irrigation zone, measured as inches per hour (mm/h). Precipitation rates of sprinkler heads are calculated according to the flow rate, pattern, and spacing of the sprinkler heads.
Recirculation System. A system of hot water supply and return piping with shutoff valves, balancing valves, circulating pumps, and a method of controlling the circulating sys tem.
Reference Evapotranspiration (ET o ). Numeric value, expressed in inches/hour (in/h), calculated as the water necessary to produce maximum biomass based upon a cool-season turf grass 4 inches to 6 inches (102 mm to 152 mm) tall. Common sources for obtaining local reference evapotranspiration rates are local agriculture extension services, state departments of agriculture, water agencies, irrigation professionals, the United States Geological Survey, and internet websites.
Renewable Energy Resources. Energy from solar, wind, biomass or hydro, or extracted from hot fluid or steam heated within the earth. [ASHRAE 90.1:3.2]
Reverse Osmosis Reject Water. Water that does not pass through a membrane of a reverse osmosis system. Run Out. The developed length of pipe that extends away from the circulating loop system to a fixture(s). Self Closing Faucet. A faucet that closes itself after the actuation or control mechanism is deactivated. The actuation
or control mechanism can be mechanical or electronic.
Single Occupant Spaces. Private offices, workstations in open offices, reception workstations, and ticket booths. Soil Absorption Rate. The rate of the soil’s ability to allow water to percolate or infiltrate the soil and be retained in the root zone of the soil expressed as inches per hour (mm/h). Sprinkler Head. Landscape irrigation emission device discharging water in the form of sprays or rotating streams, not including low flow emitters. Storage Tank. The central component of the rainwater, stormwater, or dry weather runoff catchment system. Also known as a cistern or rain barrel.
CALGreen § 90.1 Medium relevance — show source text
Reference Evapotranspiration (ET o ). Numeric value, expressed in inches/hour (in/h), calculated as the water necessary to produce maximum biomass based upon a cool-season turf grass 4 inches to 6 inches (102 mm to 152 mm) tall. Common sources for obtaining local reference evapotranspiration rates are local agriculture extension services, state departments of agriculture, water agencies, irrigation professionals, the United States Geological Survey, and internet websites.
Renewable Energy Resources. Energy from solar, wind, biomass or hydro, or extracted from hot fluid or steam heated within the earth. [ASHRAE 90.1:3.2]
Reverse Osmosis Reject Water. Water that does not pass through a membrane of a reverse osmosis system. Run Out. The developed length of pipe that extends away from the circulating loop system to a fixture(s). Self Closing Faucet. A faucet that closes itself after the actuation or control mechanism is deactivated. The actuation
or control mechanism can be mechanical or electronic.
Single Occupant Spaces. Private offices, workstations in open offices, reception workstations, and ticket booths. Soil Absorption Rate. The rate of the soil’s ability to allow water to percolate or infiltrate the soil and be retained in the root zone of the soil expressed as inches per hour (mm/h). Sprinkler Head. Landscape irrigation emission device discharging water in the form of sprays or rotating streams, not including low flow emitters. Storage Tank. The central component of the rainwater, stormwater, or dry weather runoff catchment system. Also known as a cistern or rain barrel.
Stormwater. Natural precipitation that has contacted a surface at grade or below grade and has not been put to beneficial use. Stormwater Catchment System. A system that collects and stores stormwater for beneficial use.
Submeter. A meter installed subordinate to a site meter.
Also known as a dedicated meter.
WaterSense. A voluntary program of the U.S., Environmental Protection Agency, designed to identify and promote water-efficient products and practices. Water Closet. A fixture with a water-containing receptor that receives liquid and solid body waste and on actuation conveys the waste through an exposed integral trap into a drainage system. Also referred to as a toilet.
L 301.0 General Regulations. L 301.1 Installation. Plumbing systems covered by this appendix shall be installed in accordance with this code, other applicable codes, and the manufacturer’s installation instructions.
L 301.2 Qualifications. Where permits are required, the Authority Having Jurisdiction shall have the authority to require contractors, installers, or service technicians to demonstrate competency. Where determined by the Authority Having Jurisdiction, the contractor, installer or service technician shall be licensed to perform such work.
L 302.0 Disposal of Liquid Waste.
L 302.1 Disposal. It shall be unlawful for a person to cause, suffer, or permit the disposal of sewage, human excrement, or other liquid wastes, in a place or manner, except through and by means of an approved drainage system, installed and maintained in accordance with the provisions of this code. L 302.2 Connections to Plumbing System Required. Equipment and appliances, used to receive or discharge liquid wastes or sewage, shall be connected properly to the drainage system of the building or premises, in accordance with the requirements of this code.
CALGreen § 2.7 Medium relevance — show source text
MERV Filter minimum efficiency reporting value.
METERING FAUCET. A self-closing faucet that dispenses a specific volume of water for each actuation cycle. The volume or cycle duration can be fixed or adjustable.
MODEL WATER EFFICIENT LANDSCAPE ORDINANCE (MWELO) [BSC-CG & DSA-SS] A California regulation commencing with Section 490 of Chapter 2.7, Division 2, Title 23, California Code of Regulations . The MWELO regulation establishes a structure for planning, designing, installing, maintaining and managing water efficient landscapes in new construction and rehabilitated projects.
MODEL WATER EFFICIENT LANDSCAPE ORDINANCE (MWELO). [HCD] The California model ordinance (California Code of Regulations, Title 23, Division 2, Chapter 2.7), regulating landscape design, installation and maintenance practices. Local agencies are required to adopt the updated MWELO, or adopt a local ordinance at least as effective as the MWELO.
2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 2-7
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
DEFINITIONS
MOISTURE CONTENT. The weight of the water in wood expressed in percentage of the weight of the oven-dry wood.
MOUNTING HEIGHT (MH). The height of the photometric center of a luminaire above grade level.
MULTI-OCCUPANT SPACES. Indoor spaces used for presentations and training, including classrooms and conference rooms.
NEIGHBORHOOD ELECTRIC VEHICLE (NEV). [BSC-CG, DSA-SS] A motor vehicle that meets the definition of “low-speed vehicle” either in Section 385.5 of the Vehicle Code or in 49 CFR571.500 (as it existed on July 1, 2000), and is certified to zero-emission vehicle standards.
NEWLY CONSTRUCTED (or NEW CONSTRUCTION). A newly constructed building (or new construction) does not include additions, alterations or repairs.
NO ADDED FORMALDEHYDE (NAF) BASED RESINS. Resin formulated with no added formaldehyde as part of the resin cross linking structure for making hardwood plywood, particle board or medium density fiberboard. “No added formaldehyde resins” include, but are not limited to, resins made from soy, polyvinyl acetate or methylene diisocyanate. [BSC] See CCR, Title 17, Section 93120.1(a).
NON-STORMWATER DISCHARGES. Discharges that do not originate from precipitation events. Including, but not limited to, dewatering activities, washout area discharge, vehicle and equipment cleaning, street cleaning and irrigation runoff.
NONWATER URINAL WITH DRAIN CLEANSING ACTION. A nonwater urinal that conveys waste into the drainage system without the use of water for flushing and automatically performs a drain-cleansing action after a predetermined amount of time.
OFF-STREET LOADING SPACES. [BSC-CG, DSA-SS] An area, other than a public street, public way or other property (and exclusive of off-street parking spaces), permanently reserved or set aside for the loading or unloading of motor vehicles, including ways of ingress and egress and maneuvering areas. Whenever the term “loading space” is used, it shall, unless the context clearly requires otherwise, be construed as meaning off-street loading space. This excludes designated passenger loading/unloading.
CALGreen § 0.76 Medium relevance — show source text
[BSC-CG & DSA-SS] Metering faucets for wash foun- tains shall have a maximum flow rate of not more than 0.20 gallons (0.76 L) per cycle/20 [rim space (inches) at 60 psi] in compliance with Chapter 5, Division 5.3 of the California Green Building Standards Code (CALGreen).
417.2 Deck Mounted Bath/Shower Valves. Deck mounted bath/shower transfer valves with integral backflow protection shall comply with ASME A112.18.1/CSA B125.1.
This shall include handheld showers, and other bathing appliances mounted on the deck of bathtubs or other bathing appliances that incorporate a hose or pull out feature. 417.3 Handheld Showers. Handheld showers shall comply with ASME A112.18.1/CSA B125.1. Handheld showers with integral backflow protection shall comply with ASME A112.18.1/CSA B125.1 or shall have a backflow prevention device that complies with ASME A112.18.3 or ASSE 1014. 417.4 Faucets and Fixture Fittings with Hose Con- nected Outlets. Faucets and fixture fittings with pull out spout shall comply with ASME A112.18.1/CSA B125.1. Faucets and fixture fittings with pull out spouts with integral backflow protection shall comply with ASME A112.18.1/CSA B125.1 or shall have a backflow preventer device that complies with ASME A112.18.3. 417.5 Separate Controls for Hot and Cold Water. Where two separate handles control the hot and cold water, the left-hand control of the faucet where facing the fixture fitting outlet shall control the hot water. Faucets and diverters shall be connected to the water distribution system so that hot water corresponds to the left side of the fixture fitting.
Single-handle mixing valves installed in showers and tub-shower combinations shall have the flow of hot water corresponding to the markings on the fixture fitting. 417.6 Low-Pressure Water Dispenser. Beverage faucets shall comply with ASME A112.18.1/CSA B125.1. Electrically heated or cooled water dispensers shall comply with ASSE 1023.
417.7 Head Shampoo Sink Faucets. Head shampoo sink faucets shall be supplied with hot water that is limited to not more than 120°F (49°C). Each faucet shall have integral check valves to prevent crossover flow between the hot and cold water supply connections. The means for regulating the maximum temperature shall be in accordance with one of the following:
(1) A limiting device conforming to ASSE 1070/ASME A112.1070/CSA B125.70.
(2) A water heater conforming to ASSE 1084.
(3) A temperature-actuated, flow-reduction device conforming to ASSE 1062. 417.8 Footbaths and Pedicure Baths. The water supplied to specialty plumbing fixtures, such as pedicure chairs having an integral foot bathtub and footbaths, shall be limited to not more than 120ºF (49ºC) by a water-temperaturelimiting device that conforms to ASSE 1070/ASME A112.1070/CSA B125.70 or by a water heater complying with ASSE 1084.
418.0 Floor Drains.
CALGreen § 402.1 Medium relevance — show source text
TABLE L 402.1
MAXIMUM FIXTURE AND FIXTURE FITTINGS FLOW RATES
FIXTURE TYPE FLOW RATE
Showerheads2.0 gpm at 80 psi1
Kitchen faucets residential41.8 gpm at 60 psi
Lavatory faucets residential51.5 gpm at 60 psi
Lavatory faucets other than
residential0.5 gpm at 60 psi
Metering faucets0.25 gallons/cycle
Metering faucets for wash
fountainsOne 0.25 gallons/cycle fixture fit-
ting for each 20 inches rim space
Wash fountainsOne 2.2 gpm at 60 psi fixture fit-
ting for each 20 inches rim space
Water Closets1.28 gallons/flush2
Urinals0.5 gallons/flush3
Commercial Pre-Rinse
Spray ValvesSee Section L 402.9 For SI units: 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 inch = 25.4 mm, 1 gallon = 3.785 L
Notes: 1 Shall be listed to EPA WaterSense Specification for Showerheads. For multiple showerheads serving one shower compartment see Section L
402.6.1. 2 Shall be listed to EPA WaterSense Specification for Tank-Type Toilet or Specification for Flushometer-Valve Water Closets. 3 Shall be listed to EPA WaterSense Flushing Urinal Specification. Nonwater urinals shall comply with specifications listed in Section L 402.3.1. 4 See Section L 402.4. 5 Shall be listed to EPA WaterSense High-Efficiency Lavatory Faucet Specification.
L 402.2 Water Closets. No water closet shall have an effective flush volume exceeding 1.28 gallons per flush (gpf) (4.8 Lpf). L 402.2.1 Gravity, Pressure Assisted, and Elec- tro-Hydraulic Tank Type Water Closets. Gravity, pressure assisted, and electro-hydraulic tank-type water closets shall have a maximum effective flush volume of
TABLE L 402.1
MAXIMUM FIXTURE AND FIXTURE FITTINGS FLOW RATES
For SI units: 1 gallon per minute = 0.06 L/s, 1 pound-force per square inch = 6.8947 kPa, 1 inch = 25.4 mm, 1 gallon = 3.785 L
Notes: 1 Shall be listed to EPA WaterSense Specification for Showerheads. For multiple showerheads serving one shower compartment see Section L
402.6.1. 2 Shall be listed to EPA WaterSense Specification for Tank-Type Toilet or Specification for Flushometer-Valve Water Closets. 3 Shall be listed to EPA WaterSense Flushing Urinal Specification. Nonwater urinals shall comply with specifications listed in Section L 402.3.1. 4 See Section L 402.4. 5 Shall be listed to EPA WaterSense High-Efficiency Lavatory Faucet Specification.
CALGreen § 1-5 Medium relevance — show source text
102 Construction Documents
and Installation Verification . . . . . . . . . . . . . . . . . . . .1-5
103 Building Standards Commission. . . . . . . . . . . . . . . . . . .1-5 104 Department of Housing and Community Development. . . . . . . . . . . . . . . . . .1-6 105 Division of the State Architect . . . . . . . . . . . . . . . . . . . . .1-6
106 Office of Statewide Health Planning and Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
CHAPTER 2 DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
201 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
202 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
CHAPTER 3 GREEN BUILDING . . . . . . . . . . . . . . . . . . . . . . . . 3-3
301 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
302 Mixed Occupancy Buildings . . . . . . . . . . . . . . . . . . . . . . .3-4 303 Phased Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4 304 Voluntary Tiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4 305 CALGreen Tier 1 and CALGreen Tier 2 . . . . . . . . . . . . . .3-4
306 Voluntary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
CHAPTER 4 RESIDENTIAL MANDATORY MEASURES . . . . . . 4-3
4.1 Planning and Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3 4.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7 4.3 Water Efficiency and Conservation . . . . . . . . . . . . . . . . .4-9 4.4 Material Conservation and Resource Efficiency . . . . 4-11 4.5 Environmental Quality . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
CHAPTER 5 NONRESIDENTIAL MANDATORY MEASURES . . 5-3
CALGreen § 301.0 Medium relevance — show source text
Submeter. A meter installed subordinate to a site meter.
Also known as a dedicated meter.
WaterSense. A voluntary program of the U.S., Environmental Protection Agency, designed to identify and promote water-efficient products and practices. Water Closet. A fixture with a water-containing receptor that receives liquid and solid body waste and on actuation conveys the waste through an exposed integral trap into a drainage system. Also referred to as a toilet.
L 301.0 General Regulations. L 301.1 Installation. Plumbing systems covered by this appendix shall be installed in accordance with this code, other applicable codes, and the manufacturer’s installation instructions.
L 301.2 Qualifications. Where permits are required, the Authority Having Jurisdiction shall have the authority to require contractors, installers, or service technicians to demonstrate competency. Where determined by the Authority Having Jurisdiction, the contractor, installer or service technician shall be licensed to perform such work.
L 302.0 Disposal of Liquid Waste.
L 302.1 Disposal. It shall be unlawful for a person to cause, suffer, or permit the disposal of sewage, human excrement, or other liquid wastes, in a place or manner, except through and by means of an approved drainage system, installed and maintained in accordance with the provisions of this code. L 302.2 Connections to Plumbing System Required. Equipment and appliances, used to receive or discharge liquid wastes or sewage, shall be connected properly to the drainage system of the building or premises, in accordance with the requirements of this code.
500 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
APPENDIX L
L 303.0 Abandonment.
L 303.1 General. An abandoned system or part thereof covered under the scope of this appendix shall be disconnected from remaining systems, drained, plugged, and capped in an approved manner.
L 401.0 Water Conservation and Efficiency. L 401.1 Scope. The provisions of this section establish the means of conserving potable and nonpotable water used in and around a building.
L 402.0 Water-Conserving Plumbing Fixtures and Fittings. L 402.1 General. The maximum water consumption of fixtures and fixture fittings shall comply with the flow rates specified in Table L 402.1, and Section L 402.2 through Section L 402.10.
TABLE L 402.1
MAXIMUM FIXTURE AND FIXTURE FITTINGS FLOW RATES
CALGreen § 502.7 Medium relevance — show source text
L 502.7 Maximum Volume and Length of Hot Water. The maximum volume of water contained in a hot water
branch shall be in accordance with Section L 502.7.1. The maximum length per volume of piping shall comply with Section L 502.7.2.
L 502.7.1 Maximum Volume of Hot Water in a Branch. The water volume per foot of piping shall be calculated using Table L 502.7.1. The maximum volume of water in a fixture branch between any source of hot water (water heaters, recirculation loops and electrically heat traced pipe shall be considered sources of hot water) and the fixture fitting shall be:
(1) 24 oz (710 mL) where a single branch serves a single fixture.
(2) 40 oz (1183 mL) where a series branch incorporating one or more flow-through design configurations that serves two or more fixtures.
508 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
APPENDIX L
«
«
(3) 60 oz (1774 mL) where a ring branch incorporating two or more flow-through design configurations that serves two or more fixtures.
Exceptions:
(1) The maximum volume of a single branch or series branch between any source of hot water and a kitchen sink and dishwasher located on an island or a peninsula where the floor is a concrete slab shall not contain more than 40 oz (1183 mL).
(2) The maximum volume of a single branch to a standalone tub shall not contain more than 80 oz (2366 mL).
L 502.7.2 Maximum Length Per Volume of Water in a Branch. For fixture branches in accordance with Section L 502.7.1, the maximum length of piping shall be calculated using Table L 502.7.2(1) through Table 502.7.2(4). Where a fixture fitting shut off valve (supply stop) is installed ahead of the fixture fitting, the maximum length is measured between the source of hot water and the fixture fitting shut off valve (supply stop).
L 502.7.3 Hot Water System Submeters. Where a hot water pipe from a circulation loop or electric heat trace line is equipped with a submeter, the hot water distribution system downstream of the submeter shall have either an end-of-line hot water circulation pump or shall be electrically heat traced. The maximum volume of water in a branch from the circulation loop or electric heat trace line downstream of the submeter shall not exceed 16 oz (473 mL).
Where there is no circulation loop or electric heat traced line downstream of the submeter, the submeter shall be located within 2 feet (610 mm) of the central hot water system; or the branch line to the submeter shall be circulated or heat traced to within 2 feet (610 mm) of the submeter. The maximum volume from the submeter to each fixture shall not exceed 32 oz (946 mL).
The circulation pump controls shall comply with the provisions of Section L 501.4.
L 503.0 Service Hot Water – Other Than Low-Rise Residential Buildings.
L 503.1 General. The service hot water, other than singlefamily houses, multifamily structures of three stories or fewer above grade, and modular houses shall comply with this section.
CALGreen § 90.1 Medium relevance — show source text
[ASHRAE 90.1:3.2] Site-Recovered Energy. Waste energy recovered at the building site that is used to offset consumption of purchased fuel or electrical energy supplies. [ASHRAE 90.1:3.2] Stormwater. Natural precipitation that has contacted a surface at grade or below grade and has not been put to beneficial use.
Thermal Energy. The amount of sensible heat energy stored within a material or fluid. The product of the mass, specific thermal capacity and temperature increase/decrease of the material or fluid. Also known as sensible heat energy. Thermal Storage. A tank or vessel used in a solar thermal, hydronic, or geothermal system, in which thermal energy is stored.
Total Dissolved Solids (TDS). A measure (by electrical conductivity) of the amount of soluble matter that is present in the water.
Whole House Fan. A fan used for ventilating a building or space primarily to exhaust air from the conditioned space typically through an attic.
E 301.0 General Regulations. E 301.1 Installation. Mechanical systems covered by this appendix shall be installed in accordance with this code, other applicable codes, and the manufacturer’s installation and operating instructions. E 301.2 Qualifications. Where permits are required, the Authority Having Jurisdiction shall have the authority to require contractors, installers, or service technicians to demonstrate competency. Where determined by the Authority Having Jurisdiction, the contractor, installer or service technician shall be licensed to perform such work.
E 302.0 Disposal of Liquid Waste. E 302.1 Disposal. It shall be unlawful for a person to cause, suffer, or permit the disposal of liquid wastes, in a place or manner, except through and by means of an approved drainage system, installed and maintained in accordance with the provisions of the plumbing code. E 302.2 Connections to Plumbing System Required. Equipment and appliances, used to receive or discharge liquid wastes or sewage, shall be connected to the drainage system of the building or premises in accordance with the requirements of the plumbing code and this appendix.
E 303.0 Abandonment.
E 303.1 General. An abandoned system or part thereof covered under the scope of this appendix shall be disconnected
from remaining systems, drained, plugged, and capped in an approved manner.
E 401.0 Water Conservation and Efficiency. E 401.1 General. The provisions of this section establish the means of conserving potable and nonpotable water used in and around a building.
E 402.0 Meters.
E 402.1 Required. A water meter shall be required for buildings connected to a public water system, including municipally supplied reclaimed (recycled) water. In other than single-family houses, multi-family structures not exceeding three stories above grade, and modular houses, a separate meter or submeter shall be installed in the following locations:
California Green Building Standards Code (CALGreen) Medium relevance — show source text
2
3|120
123
126|444
498
540|216
247
281|142
145
147|582
652
705|277
321
366|165
168
171|739
825
893|348
407
463| |15|1
2
3|125
128
131|511
558
597|229
260
292|153
156
159|658
718
760|297
339
382|184
187
190|824
900
960|375
432
486| |20|1
2
3|123
126
129|584
625
661|239
270
301|150
153
156|752
805
851|312
354
396|180
184
187|943
1011
1067|397
452
505| |30|1
2
3|119
122
125|680
715
746|255
287
317|145
149
152|883
928
968|337
378
418|175
179
182|1115
1171
1220|432
484
535| |50|1
2
3|115
118
121|798
827
854|294
326
357|140
143
147|1049
1085
1118|392
433
474|168
172
176|1334
1379
1421|506
558
611| |100|1
2
3|109
113
116|907
933
956|334
368
399|134
138
141|1222
1253
1282|454
497
540|161
165
169|1589
1626
1661|596
651
705|Col1 COMMON VENT CAPACITY Col3 Col4 Col5 Col6 Col7 Col8 Col9 Col10 MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches) MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches) MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches) MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches) MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches) MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches) MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches) MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches) MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches) 63 63 63 78 78 78 113 113 113 **COMBINED APPLIANCE INPUT RATING CALGreen § 2-24 Medium relevance — show source text
b. Installed on a Foundation System: The mobile home must have a foundation system as described on the California Department of Housing and Community Development website. From the Home page, click Manufactured & Mobilehomes. Then from the drop down, click Mobilehome Parks. Finally, click Laws and Regulations.)
This section says that if a mobile home park contains lots or site spaces that are set up to accommodate “movable” mobile home units, PG&E will install and supply the park using utility-approved service and metering facilities at a fixed location other than the mobile home. In these cases, applicants are responsible for connecting their mobile home units to those fixed metering facilities.
2022 – 2023 2-24
Section 2, Gas Service
2.4.2. (continued)
5. Subsidence Areas
In subsidence areas, the acceptable location requirements are the same as the requirements outlined in Subsection 2.4.2.A., “Descriptions of Acceptable Meter Locations,” on Page 2-21. PG&E may require a flexible connector to be installed between the gas meter outlet and the houseline. These connectors may require additional clearance space. See Figure 2-13, “Flex-Hose Meter Set−Residential and Small Commercial,” located below, for a sample installation. Contact your local project coordinator for Gas Design Standard J-58, “Flex Hose Meter Set Installation,” which provides information about diaphragm and rotary meters in subsidence areas.
Service Tee Owned and Installed by PG&E
Precast Concrete Pad 12” x 12” x 3”
Figure 2-13 Flex-Hose Meter Set–Residential and Small Commercial
Notes in reference to Figure 2-13.
- Hoses have a minimum bending radius (R) based on the projected settlement of the ground and on the size of the hose.
B. Unacceptable Meter Locations
For new or remodeled buildings, do not locate gas meter sets in the following areas.
In curb meter boxes or vaults. (Only allowed as an option of last resort.)
In living quarters, closets, toilet rooms, or bathrooms.
Under stairs inside or outside.
In garages without properly vented meter cabinets.
2-25 2022 – 2023
Section 2, Gas Service
2.4.2. (continued)
Behind fences. (This is not preferred, but on an exception basis may be allowed.) See Subsection 2.4.2.A.1., “Required Access,” on Page 2-21.
On steep slopes.
In areas where landscaping restricts access.
Within engine, boiler, heater, or electrical-equipment rooms.
CALGreen § 1.8.10.2 Medium relevance — show source text
8 through 1.8.10.2_||||X|||||||||||||||||||| |1.11 through 1.11.11|||X||||||||||||||||||||| |_Division II Scope_and
Administration|||||||||||||||||||||||| |R101.2|||X|X|||||||||||||||||||| |R102.8|||X||||||||||||||||||||| |R104.3|||X||||||||||||||||||||| |R104.6|||X||||||||||||||||||||| |R104.7.2|||X||||||||||||||||||||| |R104.7.3|||X||||||||||||||||||||| |R104.9 - R104.9.1|||X||||||||||||||||||||| |R105.1|||X||||||||||||||||||||| |R105.2
Building: Items 1 - 10|X||X|X|||||||||||||||||||| |Electrical:||||†|||||||||||||||||||| |Gas:||||†|||||||||||||||||||| |Mechanical:||||†|||||||||||||||||||| |Plumbing:||||†|||||||||||||||||||| |R105.2.1 - R105.2.2|||X||||||||||||||||||||| |R105.3 - R105.3.1|||X||||||||||||||||||||| |R105.4|||X||||||||||||||||||||| |R105.5.1|X||X||||||||||||||||||||| |R105.6|||X||||||||||||||||||||| |R105.7|||X||||||||||||||||||||| |R106 - R106.5|||X||||||||||||||||||||| |R106.1||||X|||||||||||||||||||| |R106.1.1||||X|||||||||||||||||||| |R106.1.3||||X|||||||||||||||||||| |R106.1.4||||X|||||||||||||||||||| |R106.1.6||||X|||||||||||||||||||| |R106.2||||X|||||||||||||||||||| |R107 - R107.4|||X||||||||||||||||||||| |R109.1|||X|X|||||||||||||||||||| |R109.1.1||||X|||||||||||||||||||| |R109.1.1.1||||X|||||||||||||||||||| |R109.1.2|||X|†|||||||||||||||||||| |R109.1.3||||X|||||||||||||||||||| |R109.1.4|||X|X|||||||||||||||||||| |R109.1.4.1||||X|||||||||||||||||||| |R109.1.4.2||||X||||||||||||||||||||2025 CALIFORNIA RESIDENTIAL CODE 1-1
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE
CHAPTER 1 – ADMINISTRATION—continued
CALGreen § 2-11 Medium relevance — show source text
Non-Preferred Meter Locations
Figure 2-11 Acceptable Locations for Gas Meter Installations
N OTE: When the meter set from the gas distribution line is located in a rear alley, applicants should locate the meter set outside of any gated or fenced area. This allows access for PG&E employees when maintenance is required.
4. Mobile Home Parks
For new mobile home parks, the mobile home park owner or operator must provide a separate and independent meter location for each lot. New mobile home parks are not allowed to have submetering facilities.
Typically, meters are located on flat surfaces that are not obstructed by landscaping. Meter locations cannot be obstructed by porches and stairs leading to porches. Figure 2-12, on Page 2-24, represents several acceptable meter locations within a typical mobile home park.
2-23 2022 – 2023
Section 2, Gas Service
2.4.2. (continued)
Distribution
Col1 Col2 Col3 Col4 Porch
Figure 2-12 Acceptable Meter Locations for Mobile Home Parks
Garage
Patio
Porch
PG&E does not provide metering facilities if they will be attached directly to a “movable” mobile home unit that is installed or set up in any location, including a mobile home park. Before PG&E provides metering facilities, the mobile home must meet both of the following conditions.
a. Fixed in Place: The mobile home typically does not have either running gear or wheels and is not capable of being moved to another location.
b. Installed on a Foundation System: The mobile home must have a foundation system as described on the California Department of Housing and Community Development website. From the Home page, click Manufactured & Mobilehomes. Then from the drop down, click Mobilehome Parks. Finally, click Laws and Regulations.)
This section says that if a mobile home park contains lots or site spaces that are set up to accommodate “movable” mobile home units, PG&E will install and supply the park using utility-approved service and metering facilities at a fixed location other than the mobile home. In these cases, applicants are responsible for connecting their mobile home units to those fixed metering facilities.
2022 – 2023 2-24
Section 2, Gas Service
2.4.2. (continued)
5. Subsidence Areas
In subsidence areas, the acceptable location requirements are the same as the requirements outlined in Subsection 2.4.2.A., “Descriptions of Acceptable Meter Locations,” on Page 2-21. PG&E may require a flexible connector to be installed between the gas meter outlet and the houseline. These connectors may require additional clearance space. See Figure 2-13, “Flex-Hose Meter Set−Residential and Small Commercial,” located below, for a [sample installation.
CALGreen § 1101.12 Medium relevance — show source text
1101.12, 1101.13, 1101.15,
1103.0, 1104.1
STORM SEWERS . . . . . . . . . .221.0, 715.3, 1101.2, 1101.4.5,
1101.12.2.2.2, 1101.13.1,
1103.2, 1104.1
STRAINERS
AND CONNECTIONS . . . . . . . . . . . . . . . . . .407.5, 408.5,
810.4, 1012.1, 1102.2
S-TRAP PROHIBITED . . . . . . . . . . . . . . . . . . . . . . . .1004.1
STREET MAIN;
(SEE WATER MAIN) . . . . . . . . . .225.0, 608.1, 608.3, 610.7,
Table 721.1, Table 1503.4, A 104.2,
A 104.4, Table H 101.8
STRUCTURAL
CONDITION SAFETY . . . . . . . . . . . . . . . . .312.2, 312.11
SUBMETER
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221.0
Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . .601.2.1
SUBMITTAL OF PLANS . . . . .103.3, 104.3, 104.3.2, 104.3.3,
301.5.3, 811.1, 910.2,
1105.1, 1304.3, 1505.2.1,
1602.2, C 301.1, C 501.1,
E 101.2, H 501.1, K 101.3.1
SUBSOIL DRAINS . . . . . . . .221.0, 1101.4.6, Table 1101.4.6,
1101.6, 1101.8, 1101.9
SUBSOIL
IRRIGATION FIELDS . . . . . .221.0, 1503.2.1, Table 1503.4,
1504.2, 1504.5, Table 1504.5.3
SUBSTITUTE MATERIALS . . . . . . . . . . . . . . . . . . . . .301.3
SUBSURFACE
DISPOSAL FIELDS
Absorption capacity . . . . . . . . . . . . . . . . . . . . . . .1504.3
Construction . . . . . . . . . . . . . . . . . . . .1504.5, 1504.5.3
Prohibited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1504.4
Required area . . . . . . . . . . . . . . . . . . . . . . . . . . .1504.2
CALGreen § 2-3 Medium relevance — show source text
VACUUM||||X|||||||||||||||||||| |REPAIR||||X|||||||||||||||||||| |REROOFING||||X|||||||||||||||||||| |RESIDENTIAL CARE FACILITY FOR THE
CHRONICALLY ILL (RCF/CI)|||X||||||||||||||||||||| |RESIDENTIAL CARE FACILITY FOR THE
ELDERLY (RCFE)|||X||||||||||||||||||||| |RESIDENTIAL FACILITY (RF)|||X||||||||||||||||||||| |RESTRAINT|||X||||||||||||||||||||| |ROOF ASSEMBLY||||X|||||||||||||||||||| |ROOF RECOVER||||X|||||||||||||||||||| |ROOF REPAIR||||X|||||||||||||||||||| |ROOF REPLACEMENT||||X|||||||||||||||||||| |SKYLIGHTS AND SLOPED GLAZING||||X|||||||||||||||||||| |SLEEPING UNIT||||X|||||||||||||||||||| |STATE-OWNED/LEASED BUILDING|||X||||||||||||||||||||| |SUBSTANTIAL IMPROVEMENT||||X|||||||||||||||||||| |SUNROOM||||X|||||||||||||||||||| |TERMINALLY ILL|||X||||||||||||||||||||| |TESTING AGENCY||||X|||||||||||||||||||| |THIRD-PARTY CERTIFICATION
AGENCY||||X|||||||||||||||||||| |THIRD-PARTY CERTIFIED||||X|||||||||||||||||||| |TODDLER|||X||||||||||||||||||||| |VENT||||X|||||||||||||||||||| |VENT CONNECTOR||||X|||||||||||||||||||| |VENT SYSTEM||||X|||||||||||||||||||| |VENTILATION||||X|||||||||||||||||||| |WATER HEATER||||X|||||||||||||||||||| |WHOLE-HOUSE MECHANICAL
VENTILATION SYSTEM||||X|||||||||||||||||||| |WILDLAND-URBAN INTERFACE (WUI)|||X|||||||||||||||||||||The state agency does not adopt sections identified with the following symbol: †
2025 CALIFORNIA RESIDENTIAL CODE 2-3
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
2-4 2025 CALIFORNIA RESIDENTIAL CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
Part II—Definitions
2 DEFINITIONS
User notes:
About this chapter: Codes, by their very nature, are technical documents. Every word, term and punctuation mark can add to or change the meaning of a technical requirement. It is necessary to maintain a consensus on the specific meaning of each term contained in the code. Chapter 2 performs this function by stating clearly what specific terms mean for the purpose of the code.
ICC code development note: Code change proposals to definitions in this chapter preceded by a bracketed letter are considered by the IRC—Building Code Development Committee [RB], the IRC—Mechanical/Plumbing Code Development Committee [MP] or the IECC—Residential Code Development Committee [RE] during the Group B (2025) Code Development Cycle.
SECTION R201—GENERAL
R201.1 Scope. Unless otherwise expressly stated, the following words and terms shall, for the purposes of this code, have the meanings indicated in this chapter.
Frequently asked questions
What exact text does CALGreen use to define "Metering Faucet" and "Submeter"?
CALGreen’s Chapter‑2 entry for Metering Faucet describes it as a self‑closing faucet dispensing a specific volume per actuation; the listing for Submeter appears in the Chapter‑2 definitions list. The plumbing code also provides a concise submeter definition: “a meter installed subordinate to a site meter.”
When do I need a submeter for a tenant?
For new buildings or additions over 50,000 ft², install separate submeters for any tenant space projected to consume more than 100 gal/day. For any tenant projected to consume more than 1,000 gal/day, a separate submeter or metering device is required regardless of building size. § 5.303.1.1 and § 5.303.1.2.
Which per‑cycle value should I use for metering faucets in CALGreen water calculations?
Use 0.20 gallons per cycle for metering faucets when doing CALGreen nonresidential baseline and worksheet calculations (see CALGreen appendix tables / WS‑1).
Do hot‑water submeters have special installation limits?
Yes. The Plumbing Code Appendix L (§ L502.7.3) sets maximum downstream volumes and location/trace/circulation requirements for hot‑water submeters; follow those when submetering hot‑water branches.
More in California Green Building Standards Code (CALGreen)
- Administration (Chapter 1)
- Nonresidential Voluntary Measures (Appendix A5 — divisions A5.1–A5.6, electives & verification)
- Residential Mandatory Measures — Planning & Design; Energy; Water; Materials; Environmental Quality (Chapter 4)
- Definitions (Chapter 2)
- Voluntary Standards for Health Facilities (Appendix A6 / OSHPD guidance)
- Green Building – scope, mixed occupancies, phased projects (Chapter 3)
- Residential Voluntary Measures (Appendix A4 — divisions A4.1–A4.6, tiers & model ordinance)
- Nonresidential Mandatory Measures — Planning & Design; Energy; Water; Materials; Environmental Quality (Chapter 5)
- Compliance verification, construction documents & checklists (Section 102, Chapter 7, Appendix checklists)
- Referenced Organizations and Standards (Chapter 6)
- Voluntary Tiers and CALGreen Tier 1 / Tier 2 (performance tiers, thresholds)
- Installer and Special Inspector Qualifications (Chapter 7)
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