CPC · California Plumbing Code
Special indirect wastes: chemical, condensate, cooling, steam, pools and appliances
Chapter 8 of the California Plumbing Code sets out air‑gap/indirect‑waste, material, pretreatment and receptor requirements for chemical, condensate, cooling, steam, pool and appliance discharges.
Last reviewed: July 6, 2026
Overview
This hub covers Chapter 8 of the California Plumbing Code — the rules for indirect wastes and special waste streams (chemical, clear/condensate, cooling water, steam/high‑temperature blowoff, pool wastes, and appliance discharges). It explains when an indirect connection, air gap/air break, receptor, or pretreatment is required and why those controls protect the sanitary sewer, building systems and occupants (see applicability and air‑gap rules at §801.1 and §801.2) .
Key topics and mandatory controls are organized by section: chemical and industrial wastes (materials, pretreatment and venting) are addressed in §811.0, including special material requirements and pretreatment obligations ; condensate collection, control, sizing and discharge requirements appear in §814.0–814.5 (including condensate disposal and pumps) ; cooling water, steam/high‑temperature discharges and intercepting sumps/condensers are covered at §808.0 and §810.0, which set out acceptable indirect connections and protections for high‑temperature or pressurized discharges . Swimming‑pool and pool‑filter backwash connections are treated as indirect wastes in §813.0 to prevent cross‑contamination of the drainage system .
In this section
- How are cooling water, boiler blowoff, condensers and high‑temperature discharges handled as indirect wastes?
- How must condensate be disposed of and what are the rules for condensate pumps?
- What appliance discharges require air gaps (dishwashers, sterilizers, drinking fountains)?
- What are the pretreatment, materials and venting requirements for chemical/industrial indirect wastes?
Code references
Grounded in the retrieved California Plumbing Code — click a citation to read the verbatim passage:
CPC § 811.3 High relevance — show source text
CPVC pipe and fittings shall comply with ASTM F2618. PP pipe and fittings shall comply with ASTM F1412 or CSA B181.3. PVDF pipe and fittings shall comply with ASTM F1673 or CSA B181.3. Chemical-resistant glass pipe and fittings shall comply with ASTM C1053. High-silicon iron pipe and fittings shall comply with ASTM A861.
811.3 Joining Materials. Joining materials shall be of approved type and quality.
811.4 Access. Where practicable, the piping shall be readily accessible and installed with the maximum of clearance from other services.
811.5 Permanent Record. The owner shall make and keep a permanent record of the location of piping and venting carrying chemical waste.
811.6 Chemical Vent. No chemical vent shall intersect
vents for other services.
811.7 Discharge. Chemical wastes shall be discharged in a manner approved by the Authority Having Jurisdiction.
811.8 Diluted Chemicals. The provisions of this section about materials and methods of construction shall not apply to installations such as photographic or x-ray darkrooms or research or control laboratories where minor amounts of ade quately diluted chemicals are discharged.
812.0 Clear Water Wastes.
812.1 General. Water lifts, expansion tanks, cooling jackets, sprinkler systems, drip or overflow pans, or similar devices that discharge clear wastewater into the building drainage system shall discharge through an indirect waste.
813.0 Swimming Pools.
813.1 General. Pipes carrying wastewater from swimming or wading pools, including pool drainage and backwash from filters, shall be installed as an indirect waste. Where a pump is used to discharge pool waste water to the drainage system, the pump discharge shall be installed as an indirect waste.
814.0 Condensate Waste and Control.
814.1 Condensate Disposal. Condensate from air washers, air-cooling coils, condensing appliances, and the over
2025 CALIFORNIA PLUMBING CODE 183
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
INDIRECT WASTES
flow from evaporative coolers and similar water-supplied equipment or similar air-conditioning equipment shall be collected and discharged to an approved plumbing fixture or disposal area. Where discharged into the drainage system, equipment shall drain using an indirect waste pipe. The waste pipe shall have a slope of not less than [1] ⁄ 8 inch per foot (10.4 mm/m) or 1 percent slope and shall be of an approved corrosion-resistant material not smaller than the outlet size in
accordance with Section 814.3 or Section 814.4 for air-cooling coils or condensing appliances, respectively. Condensate or wastewater shall not drain over a public way.
814.1.1 Condensate Pumps. Where approved by the Authority Having Jurisdiction, condensate pumps shall be installed in accordance with the manufacturer’s instal lation instructions. Pump discharge shall rise vertically to a point where it is possible to connect to a gravity condensate drain and discharged to an approved disposal point. Each condensing unit shall be provided with a separate sump and interlocked with the equipment to prevent the equipment from operating during a failure. Separate pumps shall be permitted to connect to a single gravity indirect waste where equipped with check valves and approved by the Authority Having Jurisdiction.
CPC § 1.11.0. High relevance — show source text
This state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.
2025 CALIFORNIA PLUMBING CODE 179
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
180 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
CHAPTER 8
INDIRECT WASTES
801.0 General.
801.1 Applicability. This chapter shall govern the materials, design, and installation of indirect waste piping, receptors, and connections; and provisions for discharge and disposal of condensate wastes, chemical wastes, industrial wastes, and clear water wastes.
801.2 Air Gap or Air Break Required. Indirect waste piping shall discharge into the building drainage system through an air gap or air break as set forth in this code. Where a drainage air gap is required by this code, the minimum vertical distance as measured from the lowest point of the indirect waste pipe or the fixture outlet to the flood-level rim of the receptor shall be not less than 1 inch (25.4 mm). 801.3 Food and Beverage Handling Establishments. Establishments engaged in the storage, preparation, selling, serving, processing, or other handling of food and beverage involving the following equipment that requires drainage shall provide indirect waste piping for refrigerators, refrigeration coils, freezers, walk-in coolers, iceboxes, ice-making machines, steam tables, egg boilers, coffee urns and brewers, hot-and-cold drink dispensers, and similar equipment. 801.3.1 Size of Indirect Waste Pipes. Except for refrigeration coils and ice-making machines, the size of the indirect waste pipe shall be not smaller than the drain on the unit, but shall be not smaller than 1 inch (25 mm), and the maximum developed length shall not exceed 15 feet (4572 mm). Indirect waste pipe for ice-making machines shall be not less than the drain on the unit and in no case less than [3] ⁄ 4 of an inch (20 mm). 801.3.2 Walk-In Coolers. For walk-in coolers, floor drains shall be permitted to be connected to a separate drainage line discharging into an outside receptor. The flood-level rim of the receptor shall be not less than 6 inches (152 mm) lower than the lowest floor drain. Such floor drains shall be trapped and individually vented. Cleanouts shall be provided at 90 degree (1.57 rad) turns and shall be accessibly located. Such waste shall discharge through an air gap or air break into a trapped and vented receptor, except that a full-size air gap is required where the indirect waste pipe is under vacuum. 801.3.3 Food-Handling Fixtures. Food-preparation sinks, steam kettles, potato peelers, ice cream dipper wells, and similar equipment shall be indirectly connected to the drainage system by means of an air gap.
CPC § 807.2 High relevance — show source text
807.2 Undiluted Condensate Waste. Where undiluted condensate waste from a fuel-burning condensing appliance is discharged into the drainage system, the material in the drainage system shall be cast-iron, galvanized iron, plastic, or other materials approved for this use.
Exceptions:
(1) Where the above condensate is discharged to an exposed fixture tailpiece and trap, such tailpiece and trap shall be permitted to be a copper alloy.
(2) Materials approved in Section 701.0 shall be permitted to be used where data is provided that the condensate waste is adequately diluted.
807.3 Domestic Dishwashing Machine. No domestic dishwashing machine shall be directly connected to a drainage system or food waste disposer without the use of an approved dishwasher air gap fitting on the discharge side of the dishwashing machine. Listed dishwasher air gap fittings shall be installed with the flood-level (FL) marking at or above the flood level of the sink or drainboard, whichever is higher.
808.0 Cooling Water.
808.1 General. Where permitted by the Authority Having Jurisdiction, clean running water used exclusively as a cooling medium in an appliance, device, or apparatus shall be permitted to discharge into the drainage system through the inlet side of a fixture trap in the event that a suitable fixture is not available to receive such discharge. Such trap connection shall be by means of a pipe connected to the inlet side of an approved fixture trap, the upper end terminating in a funnelshaped receptacle set adjacent, and not less than 6 inches (152 mm) above the overflow rim of the fixture.
809.0 Drinking Fountains.
809.1 General. Drinking fountains shall be permitted to be installed with indirect wastes through an air break.
810.0 Steam and Hot Water Drainage Condensers and Sumps.
810.1 High-Temperature Discharge. No steam pipe shall be directly connected to plumbing or drainage system, nor shall water having a temperature above 140°F (60°C) be discharged under pressure directly into a drainage system. Pipes from boilers shall discharge by means of indirect waste piping as determined by the Authority Having Jurisdiction or the boiler manufacturer’s recommendations. Such pipes shall be permitted to be indirectly connected by discharging into an open or closed condenser or an intercepting sump of an approved type that will prevent the entrance of steam or such water under pressure into the drainage system. Closed condensers or sumps shall be provided with a vent that shall be taken off the top and extended separately, full size above the roof. Condensers and sumps shall be properly trapped at the outlet with a deep seal trap extending to within 6 inches (152 mm) of the bottom of the tank. The top of the deep seal trap shall have a [3] ⁄ 4 of an inch (19.1 mm) opening located at the highest point of the trap to serve as a siphon breaker. Outlets shall be taken off from the side in such a manner as to allow
a waterline to be maintained that will permanently occupy not
182 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
INDIRECT WASTES
CPC § 814.0 High relevance — show source text
814.0 Condensate Waste and Control.
814.1 Condensate Disposal. Condensate from air washers, air-cooling coils, condensing appliances, and the over
2025 CALIFORNIA PLUMBING CODE 183
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
INDIRECT WASTES
flow from evaporative coolers and similar water-supplied equipment or similar air-conditioning equipment shall be collected and discharged to an approved plumbing fixture or disposal area. Where discharged into the drainage system, equipment shall drain using an indirect waste pipe. The waste pipe shall have a slope of not less than [1] ⁄ 8 inch per foot (10.4 mm/m) or 1 percent slope and shall be of an approved corrosion-resistant material not smaller than the outlet size in
accordance with Section 814.3 or Section 814.4 for air-cooling coils or condensing appliances, respectively. Condensate or wastewater shall not drain over a public way.
814.1.1 Condensate Pumps. Where approved by the Authority Having Jurisdiction, condensate pumps shall be installed in accordance with the manufacturer’s instal lation instructions. Pump discharge shall rise vertically to a point where it is possible to connect to a gravity condensate drain and discharged to an approved disposal point. Each condensing unit shall be provided with a separate sump and interlocked with the equipment to prevent the equipment from operating during a failure. Separate pumps shall be permitted to connect to a single gravity indirect waste where equipped with check valves and approved by the Authority Having Jurisdiction.
814.2 Condensate Control. Where any equipment or appliance is installed in a space where damage is capable of resulting from condensate overflow, a drain line shall be provided and shall be drained in accordance with Section 814.1.
An additional protection method for condensate overflow shall be provided in accordance with one of the following:
(1) A water level detecting device that will shut off the equipment or appliance in the event the primary drain is blocked. Such detecting device shall be in accordance with the manufacturer’s installation instructions.
(2) An additional watertight pan of corrosion-resistant material, with a separate drain line, installed beneath the cooling coil, unit, or the appliance to catch the overflow condensate due to a clogged primary condensate drain.
(3) An additional separate drain line at a level that is higher than the primary drain line connection of the drain pan.
(4) An additional watertight pan of corrosion-resistant material with a water level detection device installed beneath
the cooling coil, unit, or the appliance to catch the overflow condensate due to a clogged primary condensate drain and to shut off the equipment.
The additional pan or the additional drain line connection shall be provided with a drainpipe of not less than [3] ⁄ 4 of an inch (20 mm) nominal pipe size, discharging at a point that is readily observed.
814.2.1 Protection of Appurtenances. Where insulation or appurtenances are installed where damage is capable of resulting from a condensate drain pan overfill, such installations shall occur above the rim of the drain
pan with supports. Where the supports are in contact with the condensate waste, the supports shall be of approved corrosion-resistant material.
CPC § 801.7 High relevance — show source text
801.7 Drip or Drainage Outlets . . . . . . . .181
802.0 Approvals . . . . . . . . . . . . . . . . . . .181
802.1 General . . . . . . . . . . . . . . . . . . . . .181
803.0 Indirect Waste Piping . . . . . . . . . .181
803.1 Materials . . . . . . . . . . . . . . . . . . . .181
803.2 Copper and Copper Alloys . . . . . .181
803.3 Pipe Size and Length . . . . . . . . . .181
804.0 Indirect Waste Receptors . . . . . . .182
804.1 Standpipe Receptors . . . . . . . . . .182
805.0 Pressure Drainage Connections . . . . . . . . . . . . . . . . .182
805.1 General . . . . . . . . . . . . . . . . . . . . .182
806.0 Sterile Equipment . . . . . . . . . . . . .182
806.1 General . . . . . . . . . . . . . . . . . . . . .182
807.0 Appliances . . . . . . . . . . . . . . . . . .182
807.1 Non-Classed Apparatus . . . . . . . .182
807.2 Undiluted Condensate Waste . . . .182
807.3 Domestic Dishwashing Machine . . . . . . . . . . . . . . . . . . . .182
808.0 Cooling Water . . . . . . . . . . . . . . . .182
808.1 General . . . . . . . . . . . . . . . . . . . . .182
809.0 Drinking Fountains . . . . . . . . . . . .182
809.1 General . . . . . . . . . . . . . . . . . . . . .182
810.0 Steam and Hot Water Drainage Condensers and Sumps . . . . . . . .182
810.1 High-Temperature Discharge . . . .182
Table 810.1 Pipe Connections in Blowoff Condensers and Sumps . . . . . . . .183
810.2 Sumps, Condensers, and Intercepting Tanks . . . . . . . . . . . .183
810.3 Cleaning . . . . . . . . . . . . . . . . . . . .183
810.4 Strainers . . . . . . . . . . . . . . . . . . . .183
811.0 Chemical Wastes . . . . . . . . . . . . .183
811.1 Pretreatment . . . . . . . . . . . . . . . . .183
811.2 Waste and Vent Pipes . . . . . . . . .183
811.3 Joining Materials . . . . . . . . . . . . . .183
811.4 Access . . . . . . . . . . . . . . . . . . . . .183
811.5 Permanent Record . . . . . . . . . . . .183
811.6 Chemical Vent . . . . . . . . . . . . . . .183
CPC § 814.3 High relevance — show source text
814.3 Condensate Waste Pipe Material and Sizing. Condensate waste pipes from air-cooling coils shall be sized in accordance with the equipment capacity as specified in Table 814.3. The material of the piping shall comply with the pressure and temperature rating of the appliance or equipment and shall be approved for use with the liquid being discharged.
TABLE 814.3
MINIMUM CONDENSATE PIPE SIZE
EQUIPMENT CAPACITY IN TONS
OF REFRIGERATIONMINIMUM CONDENSATE PIPE
DIAMETER
(inches)Up to 20 3⁄4
21 – 401
41 – 9011⁄4
91 – 12511⁄2
126 – 2502 For SI units: 1 ton of refrigerant = 3.52 kW, 1 inch = 25 mm
The size of condensate waste pipes is for one unit or a combination of units, or as recommended by the manufacturer. The capacity of waste pipes assumes a [1] ⁄ 8 inch per foot (10.4 mm/m) or 1 percent slope, with the pipe running threequarters full at the following pipe conditions:
Outside Air – 20% Col2 Room Air – 80% Col4
DBWB DB WB
90°F73°F 75°F 62.5°FFor SI units: °C = (°F-32)/1.8
Condensate drain sizing for other slopes or other conditions shall be approved by the Authority Having Jurisdiction.
Air-conditioning waste pipes, 1¼ of an inch (32 mm) and larger in size, shall be constructed of materials specified in Chapter 7. Condensate waste piping less than 1¼ of an inch (32 mm) in size shall be permitted to be PVC, CPVC, PE, PP, copper, or other rigid materials approved by the Authority Having Jurisdiction.
814.3.1 Cleanouts. Condensate drain lines shall be configured or provided with a cleanout to permit the clearing of blockages and for maintenance without requiring the drain line to be cut. 814.4 Appliance Condensate Drains. Condensate drain lines from individual condensing appliances shall be sized as required by the manufacturer’s instructions. Condensate drain lines serving more than one appliance connecting to a common indirect waste pipe shall have the connections to the indirect waste pipe protected by a sanitary waste valve complying with ASME A112.18.8, condensate trap complying with IAPMO IGC 196, or trap with a trap primer. 814.5 Point of Discharge. Air-conditioning condensate waste pipes shall connect indirectly to the drainage system through an air gap or air break to trapped and vented receptors, dry wells, mop sinks, leach pits, or the tailpiece of plumbing fixtures. An individual condensate drain shall be trapped in accordance with the appliance manufacturer’s instructions or in accordance with Section 814.4.
TABLE 814.3
MINIMUM CONDENSATE PIPE SIZE
For SI units: 1 ton of refrigerant = 3.52 kW, 1 inch = 25 mm
CPC § 814.3.1 High relevance — show source text
Condensate drain sizing for other slopes or other conditions shall be approved by the Authority Having Jurisdiction.
Air-conditioning waste pipes, 1¼ of an inch (32 mm) and larger in size, shall be constructed of materials specified in Chapter 7. Condensate waste piping less than 1¼ of an inch (32 mm) in size shall be permitted to be PVC, CPVC, PE, PP, copper, or other rigid materials approved by the Authority Having Jurisdiction.
814.3.1 Cleanouts. Condensate drain lines shall be configured or provided with a cleanout to permit the clearing of blockages and for maintenance without requiring the drain line to be cut. 814.4 Appliance Condensate Drains. Condensate drain lines from individual condensing appliances shall be sized as required by the manufacturer’s instructions. Condensate drain lines serving more than one appliance connecting to a common indirect waste pipe shall have the connections to the indirect waste pipe protected by a sanitary waste valve complying with ASME A112.18.8, condensate trap complying with IAPMO IGC 196, or trap with a trap primer. 814.5 Point of Discharge. Air-conditioning condensate waste pipes shall connect indirectly to the drainage system through an air gap or air break to trapped and vented receptors, dry wells, mop sinks, leach pits, or the tailpiece of plumbing fixtures. An individual condensate drain shall be trapped in accordance with the appliance manufacturer’s instructions or in accordance with Section 814.4.
TABLE 814.3
MINIMUM CONDENSATE PIPE SIZE
For SI units: 1 ton of refrigerant = 3.52 kW, 1 inch = 25 mm
For SI units: °C = (°F-32)/1.8
184 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
INDIRECT WASTES
814.6 Condensate Waste from Air-Conditioning Coils. Where the condensate waste from air-conditioning coils discharges by direct connection to a lavatory tailpiece or to an approved accessible inlet on a bathtub overflow, the connection shall be located in the area controlled by the same person controlling the air-conditioned space. 814.7 Plastic Fittings. Female plastic screwed fittings shall be used with male plastic fittings and plastic threads.
2025 CALIFORNIA PLUMBING CODE 185
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
186 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE
CHAPTER 9 - VENTS
(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
CPC § 808.0 Medium relevance — show source text
808.0 Cooling Water . . . . . . . . . . . . . . . .182
808.1 General . . . . . . . . . . . . . . . . . . . . .182
809.0 Drinking Fountains . . . . . . . . . . . .182
809.1 General . . . . . . . . . . . . . . . . . . . . .182
810.0 Steam and Hot Water Drainage Condensers and Sumps . . . . . . . .182
810.1 High-Temperature Discharge . . . .182
Table 810.1 Pipe Connections in Blowoff Condensers and Sumps . . . . . . . .183
810.2 Sumps, Condensers, and Intercepting Tanks . . . . . . . . . . . .183
810.3 Cleaning . . . . . . . . . . . . . . . . . . . .183
810.4 Strainers . . . . . . . . . . . . . . . . . . . .183
811.0 Chemical Wastes . . . . . . . . . . . . .183
811.1 Pretreatment . . . . . . . . . . . . . . . . .183
811.2 Waste and Vent Pipes . . . . . . . . .183
811.3 Joining Materials . . . . . . . . . . . . . .183
811.4 Access . . . . . . . . . . . . . . . . . . . . .183
811.5 Permanent Record . . . . . . . . . . . .183
811.6 Chemical Vent . . . . . . . . . . . . . . .183
811.7 Discharge . . . . . . . . . . . . . . . . . . .183
811.8 Diluted Chemicals . . . . . . . . . . . . .183
812.0 Clear Water Wastes . . . . . . . . . . .183
812.1 General . . . . . . . . . . . . . . . . . . . . .183
813.0 Swimming Pools . . . . . . . . . . . . . .183
813.1 General . . . . . . . . . . . . . . . . . . . . .183
814.0 Condensate Waste and Control . . .183
814.1 Condensate Disposal . . . . . . . . . .183
814.2 Condensate Control . . . . . . . . . . .184
814.3 Condensate Waste Pipe Material and Sizing . . . . . . . . . . . .184
Table 814.3 Minimum Condensate Pipe Size . . . . . . . . . . . . . . . . . . .184
814.4 Appliance Condensate Drains . . .184
814.5 Point of Discharge . . . . . . . . . . . .184
814.6 Condensate Waste from
Air-Conditioning Coils . . . . . . . . . .185
814.7 Plastic Fittings . . . . . . . . . . . . . . .185
xxxvi 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
TABLE OF CONTENTS
CPC § 701.2 Medium relevance — show source text
VITRIFIED CLAY PIPE . . . . . . . . .701.2, Table 701.2, 705.8,
811.2, Table 1101.4.6
– W –
WALL, EXTENSION THROUGH . . . . .312.1, 509.6.1, 509.8
WALL-HUNG FIXTURES,
INSTALLATION OF . . . . . . . . . . . . . . . . . . . . .402.4, 402.6
WASH FOUNTAINS . . . . . . . . . . . . . . . . . . . . . 417.1.1, 417.1.2
WASH RACKS, AUTO . . . . . . . . . . . . . . . . . . . . . . . . . 1011.0
WASTES
Anesthetic gas disposal . . . . . . . . . . . . . . . . . . . .1301.2 Chemical . . . . . . . . . . . . . . . . . . . .205.0, 811.0, 903.2.2
Clear water . . . . . . . . . . . . . . . . . . . . . . . . .205.0, 812.0
Condensate . . . . . . . . . . . . . . . . . . . . . . . . .807.2, 814.0
Continuous . . . . . . . . . . . . . . . . . . . . . . . . .205.0, 407.5,
408.5, 409.2, 419.2
Cooling water . . . . . . . . . . . . . . . . . . . . . . . . . . . .808.0
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225.0
Detrimental or harmful . . . . . . . . . .305.1, 306.1, 714.1,
811.1, 1009.1, H 901.1
Flammable . . . . . . . . . . . . . . . . . . . . . . .1009.1, H 901.1
Indirect . . . . . . . . . . . . . . . . . . . . . .Chapter 8, 1303.4.1
2025 CALIFORNIA PLUMBING CODE 585
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
INDEX
Industrial . . . . . . . . . . . . . . . . . . . . .211.0, 306.0, 801.1,
811.1, 903.2.2
Liquid . . . . . . . . . . . . . . . . . .214.0, 303.0, 304.0, 710.2, 811.1, 1006.1, 1009.1, H 101.3,
H 701.1, H 901.1, L 302.0
CPC § 722.3 Medium relevance — show source text
722.3 Filling . . . . . . . . . . . . . . . . . . . . . .178
722.4 Ownership . . . . . . . . . . . . . . . . . .178
722.5 Disposal Facilities . . . . . . . . . . . . .178
723.0 Building Sewer Test . . . . . . . . . . .178
723.1 General . . . . . . . . . . . . . . . . . . . . .178
724.0 Meat and Poultry Processing Plant Drainage . . . . . . . . . . . . . . .178
725.0 Collection Center and
Facilities Drainage . . . . . . . . . . . .178
726.0 Drainage and Plumbing, General . . . . . . . . . . . . . . . . . . . . .178
727.0 Emergency Sanitary Drainage . . .178
CHAPTER 8 INDIRECT WASTES . . . . . . . . . .179
801.0 General . . . . . . . . . . . . . . . . . . . . .181
801.1 Applicability . . . . . . . . . . . . . . . . . .181
801.2 Air Gap or Air Break Required . . .181
801.3 Food and Beverage Handling Establishments . . . . . . .181
801.4 Bar and Fountain Sink Traps . . . .181
801.5 Connections from Water Distribution System . . . . . . . . . . . .181
801.6 Sterilizers . . . . . . . . . . . . . . . . . . .181
801.7 Drip or Drainage Outlets . . . . . . . .181
802.0 Approvals . . . . . . . . . . . . . . . . . . .181
802.1 General . . . . . . . . . . . . . . . . . . . . .181
803.0 Indirect Waste Piping . . . . . . . . . .181
803.1 Materials . . . . . . . . . . . . . . . . . . . .181
803.2 Copper and Copper Alloys . . . . . .181
803.3 Pipe Size and Length . . . . . . . . . .181
804.0 Indirect Waste Receptors . . . . . . .182
804.1 Standpipe Receptors . . . . . . . . . .182
805.0 Pressure Drainage Connections . . . . . . . . . . . . . . . . .182
805.1 General . . . . . . . . . . . . . . . . . . . . .182
806.0 Sterile Equipment . . . . . . . . . . . . .182
806.1 General . . . . . . . . . . . . . . . . . . . . .182
807.0 Appliances . . . . . . . . . . . . . . . . . .182
807.1 Non-Classed Apparatus . . . . . . . .182
807.2 Undiluted Condensate Waste . . . .182
807.3 Domestic Dishwashing Machine . . . . . . . . . . . . . . . . . . . .182
CPC § 316.0 Medium relevance — show source text
INCREASERS AND REDUCERS . . . . . . . . . . . . . . . .316.0
INDIRECT-FIRED WATER HEATERS . . . . . . . .211.0, 505.4,
603.5.4, 608.7 INDIRECT WASTE . . . . . . . . . . . . . . . . . . . . . . . .Chapter 8 Air gap or break . . . . . . . . . . . . . . . . . . . . . . . . . . .801.2 Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .807.0 Approval required . . . . . . . . . . . . . . . . . . . . . . . . .802.0 Aspirators . . . . . . . . . . . . . . . . . . . . . . .603.5.9, 1303.5
Chemical wastes . . . . . . . . . . . . . . . . . . . . . . . . . .811.0
Cleanouts . . . . . . . . . . . . . . . . . . . . . . . . .801.3.2, 803.3
Clear water wastes . . . . . . . . . . . . . . . . . . . . . . . .812.0
Condensate . . . . . . . . . . . . . . . . . .814.1, 814.1.1, 814.5 Food handling fixtures . . . . . . . . . . . . . . . . . . . . .801.3.3 High temperature discharge . . . . . . . . . . . . . . . . .810.1 Interceptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .902.1 Receptors . . . . . . . . . . . . . . . . . . . . . . . . . .801.4, 804.0 Sterile equipment . . . . . . . . . . . .801.6, 806.0, 1303.4.1 Swimming pools . . . . . . . . . . . . . . . . . . . . . . . . . .813.0 Traps . . . . . . . . . . . . . . . . . . . . . . .801.3.2, 803.3, 814.5
Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .803.3
Where required . . . . . . . . . . . . . . . . . . . . . . . . . . .801.2
INDIVIDUAL VENTS . . . . . . . . . . .211.0, Table 703.2, 904.1,
908.2.1
2025 CALIFORNIA PLUMBING CODE 569
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
INDEX
INDUSTRIAL WASTES
CPC § 309.0 Medium relevance — show source text
309.0 Workmanship.
309.1 Engineering Practices. Design, construction, and workmanship shall comply with accepted engineering practices and shall be of such character as to secure the results sought to be obtained by this code.
309.2 Concealing Imperfections. It shall be unlawful to conceal cracks, holes, or other imperfections in materials by welding, brazing, or soldering, by using therein or thereon paint, wax, tar, solvent cement, other leak-sealing or repair agent.
309.3 Installation Practices. Mechanical systems shall be installed in a manner that is in accordance with this code, applicable standards, and the manufacturer’s installation instructions. All mechanical systems shall be in accordance with construction documents approved by the Authority Having Jurisdiction.
310.0 Condensate Wastes and Control.
310.1 Condensate Disposal. Condensate from air washers, air-cooling coils, condensing appliances, and the overflow from evaporative coolers and similar water-supplied equipment or similar air-conditioning equipment shall be collected and discharged to an approved plumbing fixture or disposal area. Where discharged into the drainage system, equipment shall drain by means of an indirect waste pipe. The waste pipe shall have a slope of not less than [1] ⁄ 8 inch per foot (10.4 mm/m) or 1 percent slope and shall be of approved corrosion-resistant material not smaller than the outlet size in
accordance with Section 310.3 or Section 310.4 for air-cooling coils or condensing appliances, respectively. Condensate or wastewater shall not drain over a public way.
310.1.1 Condensate Pumps. Where approved by the Authority Having Jurisdiction, condensate pumps shall be installed in accordance with the manufacturer’s installation instructions. Pump discharge shall rise vertically to a point where it is possible to connect to a gravity condensate drain and discharged to an approved disposal point. Each condensing unit shall be provided with a separate sump and interlocked with the equipment to prevent the equipment from operating during a failure. Separate pumps shall be permitted to connect to a single gravity indirect waste where equipped with check valves and approved by the Authority Having Jurisdiction.
310.2 Condensate Control. Where any equipment or appliance is installed in a space where damage is capable of resulting from condensate overflow, a drain line shall be provided and shall be drained in accordance with Section 310.1. An additional protection method for condensate overflow shall be provided in accordance with one of the following:
(1) A water level detecting device that will shut off the equipment or appliance in the event the primary drain is
EQUIPMENT CAPACITY IN
TONS OF REFRIGERATIONMINIMUM CONDENSATE
PIPE DIAMETER
(inches)
Up to 203⁄4
21 – 401
41 – 9011⁄4
91 – 12511⁄2
126 – 2502 For SI units: 1 ton of refrigeration = 3.52 kW, 1 inch = 25 mm
Frequently asked questions
When does Chapter 8 require an indirect connection (air gap/air break)?
Indirect connections are required where the code would otherwise permit a direct discharge that could contaminate the drainage system or be under pressure; see the chapter applicability and the air‑gap/air‑break rule at §801.1 and §801.2 for the general requirement and minimum air‑gap dimensions .
What are the special requirements for chemical or industrial wastes?
Chemical/process wastes that can harm the sewer or treatment works must be pretreated and conveyed in approved corrosion‑resistant materials; see §811.0 for pretreatment, material and venting requirements and the Authority Having Jurisdiction’s role in approving discharge methods filecite.
How are condensate drains sized and protected?
Condensate drains must be sized to equipment capacity (see Table 814.3), use corrosion‑resistant materials, and provide secondary overflow protection or level shutoffs where overflow could cause damage; see §814.1–814.5 and Table 814.3 for sizing, materials and overflow controls .
More in California Plumbing Code
- Administration
- Definitions
- General Regulations
- Plumbing Fixtures and Fixture Fittings
- Water Heaters
- Water Supply and Distribution
- Sanitary Drainage (Drain, Waste, and Vent)
- Indirect Wastes
- Vents
- Traps and Interceptors
- Storm Drainage
- Fuel Gas Piping
- Health Care Facilities — Medical Gas and Medical Vacuum Systems
- Alternate Water Sources and Nonpotable Rainwater Catchment Systems
Ask about the CPC
Get cited, plain-English answers on the California Plumbing Code for your project — any code section, any scenario.
Start Free Trial