Connections, Separation & Cross‑connection Control

Grounded in the retrieved California Plumbing Code — click a citation to read the verbatim passage:

• CPC § 312A.5.1. High relevance — show source text

  6. If the SPC building removed from general acute care service shares a common fire alarm system with the acute care hospital, the main fire alarm control panel shall be located in an acute care hospital building. The SPC building removed from general acute care service shall be in a separate zone monitored by the main fire alarm control panel. Flexible connections shall be provided for conduits/conductors crossing structural or SPC seismic separation joints. If the intent is to place the SPC building under local jurisdiction, the building shall satisfy Section 312A.5.1.

  Exception: Flexible connections for fire alarm conduits/conductors crossing seismic separation joints between an SPC building removed from general acute care service and adjacent SPC-1 or SPC-2 buildings may be omitted, provided the fire alarm in the adjacent SPC-1 and SPC-2 buildings have no connection to any SPC-3, SPC-4, SPC-4D and SPC-5 buildings providing general acute care service.

  7. If the SPC building removed from general acute care service shares the fire sprinkler system with the acute care hospital, an isolation valve with a tamper switch shall be provided to isolate the portion of the system serving the SPC building removed from acute care service. Flexible connections shall be provided in piping that crosses structural or SPC seismic separation joints. The fire sprinkler system shall not originate in the SPC building removed from general acute care service. If the intent is to place the building under local jurisdiction, the building shall satisfy Section 312A.5.1.

  Exception: Flexible connections for seismic separation joints and fail safe shutoff valves, and disconnects for utilities between an SPC building removed from general acute care service and adjacent SPC-1 or SPC-2 buildings may be omitted, provided util- ities in the adjacent SPC-1 and SPC-2 buildings have no connection to any SPC-3, SPC-4, SPC-4D and SPC-5 buildings providing general acute care service.

  8. Patient access as required by California Building Code Section 1224.4.7.5 does not pass through an SPC building removed from general acute care service or through buildings that are not under the jurisdiction of OSHPD.

  9. The primary accessible entrance to the hospital is not through an SPC building removed from general acute care service or through buildings that are not under the jurisdiction of OSHPD.

  10. No utilities servicing acute care hospital buildings originate in or pass through, over or under, an SPC building removed from general acute care service, except as permitted by Section 310A.1.1.1.5, or a building not under OSHPD jurisdiction.

  11. If utilities originating in an acute care hospital building feed an SPC building removed from general acute care hospital service, fail safe shutoff valves and/or disconnects shall be provided that permit isolation of the SPC building removed from general acute care service from the hospital utilities. Flexible connections shall be provided for all utilities crossing structural or SPC seismic separation joints.

  Exception: Flexible connections for seismic separation joints and fail safe shutoff valves, and disconnects for utilities between an SPC building removed from general acute care service and adjacent SPC-1 or SPC-2 buildings may be omitted, provided util- ities in the adjacent SPC-1 and SPC-2 buildings have no connection to any SPC-3, SPC-4, SPC-4D and SPC-5 buildings providing general acute care service.

• CPC § 1505.1 High relevance — show source text

  1505.1 General . . . . . . . . . . . . . . . . . . . . .318

  1505.2 Permit . . . . . . . . . . . . . . . . . . . . . .319

  1505.3 System Changes . . . . . . . . . . . . .319

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  TABLE OF CONTENTS

  1505.4 Connections to Potable or Recycled Water Supply Systems . . . . . . . . . . . . . . . . . . . .319

  1505.5 Water Pressure . . . . . . . . . . . . . . .319

  1505.6 Initial Cross-Connection Test . . . .319

  1505.7 Recycled Water Supply System Materials . . . . . . . . . . . . .319

  1505.8 Recycled Water Supply System Color and Marking Information . . . . . . . . . . . . . . . . . .319

  1505.9 Valves . . . . . . . . . . . . . . . . . . . . . .319

  1505.10 Hose Bibbs . . . . . . . . . . . . . . . . . .320

  1505.11 Required Appurtenances . . . . . . .320

  1505.12 Pipe Separation in Trenches . . . .320

  1505.13 Signage . . . . . . . . . . . . . . . . . . . .320

  1505.14 Inspection and Testing . . . . . . . . .320

  1505.15 Minimum Water Quality Requirements for Reclaimed (Recycled) Water . . . . . . . . . . . . .322

  1505.16 Maintenance and Inspection . . . .322

  Table 1505.16 Minimum Reclaimed (Recycled) Water Source Testing, Inspection, and Maintenance Frequency . . . . . . .322

  1506.0 On-Site Treated Nonpotable Gray Water Systems . . . . . . . . . .322

  1506.1 General . . . . . . . . . . . . . . . . . . . . .322

  1506.2 Plumbing Plan Submission . . . . . .322

  1506.3 System Changes . . . . . . . . . . . . .322

  1506.4 Connections to Potable or Recycled Water Supply Systems . . . . . . . . . . . . . . . . . . . .322

  1506.5 Water Pressure . . . . . . . . . . . . . . .322

  1506.6 Initial Cross-Connection Test . . . .323

  1506.7 On-Site Treated Nonpotable Gray Water System Materials . . .323

  1506.8 On-Site Treated Nonpotable Gray Water Devices and Systems . . . . . . . . . . . . . . . . . . . .323

  1506.9 On-Site Treated Nonpotable Gray Water System Color and Marking Information . . . . . . . . . . .323

• CPC § 1505.3 High relevance — show source text

  1505.3 System Changes. No changes or connections shall be made to either the recycled water supply system or the potable water system within a site containing a recycled water supply system without approval by the Authority Having Jurisdiction.

  1505.4 Connections to Potable or Recycled Water Supply Systems. Recycled water supply systems shall have no direct connection to a potable water supply or alternate water source system.

  Exceptions:

  (1) Potable water is permitted to be used as makeup water for a reclaimed (recycled) water storage tank provided the potable water supply inlet is protected by an air gap in accordance with this code.

  (2) A potable water supply may be connected temporarily for initial testing of the recycled water supply system as provided in Section 1505.14.2.2. Prior to temporarily connecting the potable line to the recycled water supply system for the initial cross-connection test purposes, the potable line must have a reduced-pressure principle backflow preventer installed.

  (3) Reclaimed (recycled) water is permitted to be used as makeup water for an alternate water source system pro- vided the recycled water supply system is protected by an air gap in accordance with this code.

  (4) In order to use potable water as an auxiliary water sup- ply when there is an interruption to the reclaimed (recy- cled) water supply, a changeover device, swivel ell, or other assembly is permitted if the following two condi-

  tions are met:

  (a) The water user maintains ongoing compliance with State Water Resources Control Board’s Cross-Con-

  nection Control Policy Handbook requirements.

  (b) The changeover device, swivel ell, or other assembly complies with the State Water Resources Control Board’s Cross-Connection Control Policy Handbook requirements.

  1505.5 Water Pressure. Reclaimed (recycled) water systems supplying water to water closets, urinals, and trap primers shall be capable of delivering not less than 15 pounds-force per square inch (psi) (103 kPa) residual pressure at the highest and most remote outlet served. Where the water pressure in the reclaimed water supply system within the building exceeds 80 psi (552 kPa), a pressure reducing valve reducing the pressure to 80 psi (552 kPa) or less to water outlets in the building shall be installed.

  1505.6 Initial Cross-Connection Test. A cross-connection test is required in accordance with Section 1505.14.2.2 . Before the building is occupied or the system is activated, the installer shall perform an initial cross-connection test in the presence of the Authority Having Jurisdiction or other authorities having jurisdiction. The test shall be ruled successful by the Authority Having Jurisdiction before final approval is granted. 1505.7 Recycled Water Supply System Materials. Reclaimed (recycled) water supply and distribution system materials shall comply with the requirements of this code for potable water supply and distribution systems unless otherwise provided for in this section.

  1505.8 Recycled Water Supply System Color and Marking Information. All mechanical equipment, including control valves, appurtenant to recycled water supply systems shall be painted purple or composed of purple material _matching Pantone color No. 512, 522C or equivalent.

• CPC § 602.4 High relevance — show source text

  602.4 Approval by Authority. No water piping supplied by a private water supply system shall be connected to any other source of supply without the approval of the Authority Having Jurisdiction, Health Department, or other department having jurisdiction.

  603.0 Cross-Connection Control.

  603.1 General. Cross-connection control shall be provided in accordance with the provisions of this chapter.

  No person shall install a water-operated equipment or mechanism, or use a water-treating chemical or substance, where it is found that such equipment, mechanism, chemical, or substance causes pollution or contamination of the domestic water supply. Such equipment or mechanism shall be permitted where equipped with an approved backflow prevention device or assembly.

  603.2 Approval of Devices or Assemblies. Before a device or an assembly is installed for the prevention of backflow, it shall have first been approved by the Authority Having Jurisdiction. Devices or assemblies shall be tested in accordance with recognized standards or other standards acceptable to the Authority Having Jurisdiction. Backflow prevention devices and assemblies shall comply with Table 603.2, except for specific applications and provisions as stated in Section 603.5.1 through Section 603.5.22.

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  WATER SUPPLY AND DISTRIBUTION

  Devices or assemblies installed in a potable water supply system for protection against backflow shall be maintained in good working condition by the person or persons having control of such devices or assemblies. Such devices or assemblies shall be tested at the time of installation, repair, or relocation and not less than on an annual schedule thereafter, or more often where required by the Authority Having Jurisdiction. Where found to be defective or inoperative, the device or assembly shall be repaired or replaced. No device or assembly shall be removed from use or relocated or other device or assembly substituted, without the approval of the Authority Having Jurisdiction.

  Testing or maintenance shall be performed by a certified backflow assembly tester or repairer certified in accordance with ASSE/IAPMO/ANSI Series 5000 or any other additional certification approved by the Authority Having Jurisdiction.

  603.3 Backflow Prevention Devices, Assemblies, and Methods. Backflow prevention devices, assemblies, and methods shall comply with Section 603.3.1 through Section 603.3.12.

  603.3.1 Air Gap. The minimum air gap to afford backflow protection shall be in accordance with Table 603.3.1. 603.3.2 Atmospheric Vacuum Breaker (AVB). An atmospheric vacuum breaker consists of a body, a checking member, and an atmospheric port.

  603.3.3 Hose Connection Backflow Preventer. A hose connection backflow preventer consists of two independent check valves with an independent atmospheric vent between and a means of field testing and draining.

  603.3.4 Double Check Valve Backflow Prevention Assembly (DC). A double check valve backflow prevention assembly consists of two independently acting internally loaded check valves, four properly located test cocks, and two isolation valves.

  603.3.5 Pressure Vacuum Breaker Backflow Pre- vention Assembly (PVB). A pressure vacuum breaker backflow prevention assembly consists of a loaded air inlet valve, an internally loaded check valve, two properly located test cocks, and two isolation valves.

• CPC § 1505.14.2.1 High relevance — show source text

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  ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

  dance with Section 1505.14.2.1 through Section 1505.14.2.4. The inspection and testing shall be per- formed by a cross-connection control specialist who has valid certification from a certifying organization recog- nized by the State Water Resources Control Board pur- suant to its Cross-Connection Control Policy Handbook. (1) Written reports of cross-connection inspections and testing shall be performed as provided in California Code of Regulations, Title 22, Section 60316.

  (2) A cross-connection test pursuant to Section 1505.14.2.2 shall be performed on the premises of a recycled water supply system when there is material reason to believe that the potable water system or recycled water supply system separation from another water supply has been compromised. A material reason to believe that the system has been compromised may be based on, but is not limited to, evidence gathered (a) during a visual inspection performed pursuant to Section 1505.14.2.1, (b) as a result of an inspection performed following com- plaints of water quality or flow conditions consis- tent with a compromised system, or (c) during a visual inspection that indicates that the recycled water supply system has been modified. 1505.14.2.1 Visual System Inspection. A visual dual system inspection shall be conducted by the Authority Having Jurisdiction and other authorities having jurisdiction to verify that no modifications were made, and that no cross-connections are visi- ble as follows:

  (1) Meter locations of the reclaimed (recycled) water source and potable water lines shall be checked.

  (2) All pumps and equipment, equipment room signs, and exposed piping in equipment room shall be checked.

  (3) All valves shall be checked to ensure that the valve lock seals are still in place and intact. Valve control door signs shall be checked to verify that no signs have been removed.

  1505.14.2.2 Cross-Connection Test. A cross- connection test shall be performed pursuant to Sec- tion 1505.14.2. The test shall be conducted in the presence of the Authority Having Jurisdiction or other authorities having jurisdiction to determine whether a cross connection has occurred as follows:

  (1) The potable water system shall be activated and pressurized. The recycled water supply system shall be shut down, depressurized, and drained.

  (2) The potable water system shall remain pressur- ized for a minimum period of time specified by the Authority Having Jurisdiction while the recycled water supply system is empty. The min- imum period the recycled water supply system is to remain depressurized shall be determined on a case-by-case basis, taking into account the size and complexity of the potable and the recy- cled water supply systems, but in no case shall that period be less than 1 hour.

• CPC § 602.0 High relevance — show source text

  602.0 Unlawful Connections.

  602.1 Prohibited Installation. No installation of potable water supply piping, or part thereof, shall be made in such a manner that it will be possible for used, unclean, polluted, or contaminated water, mixtures, or substances to enter a portion of such piping from a tank, receptor, equipment, or plumbing fixture by reason of backsiphonage, suction, or other cause, either during normal use and operation thereof, or where such tank, receptor, equipment, or plumbing fixture is flooded or subject to pressure exceeding the operating pressure in the hot or cold water piping. 602.2 Cross-Contamination. No person shall make a connection or allow one to exist between pipes or conduits carrying domestic water supplied by a public or private building supply system, and pipes, conduits, or fixtures containing or carrying water from any other source or containing or carrying water that has been used for any purpose whatsoever, or piping carrying chemicals, liquids, gases, or substances whatsoever, unless there is provided a backflow prevention device approved for the potential hazard and maintained in accordance with this code. Each point of use shall be separately protected where potential cross-contamination of individual units exists.

  602.3 Backflow Prevention. No plumbing fixture, device, or construction shall be installed or maintained, or shall be connected to a domestic water supply, where such installation or connection provides a possibility of polluting such water supply or cross-connection between a distributing system of water for drinking and domestic purposes and water that becomes contaminated by such plumbing fixture, device, or construction unless there is provided a backflow prevention device approved for the potential hazard.

  602.4 Approval by Authority. No water piping supplied by a private water supply system shall be connected to any other source of supply without the approval of the Authority Having Jurisdiction, Health Department, or other department having jurisdiction.

  603.0 Cross-Connection Control.

  603.1 General. Cross-connection control shall be provided in accordance with the provisions of this chapter.

  No person shall install a water-operated equipment or mechanism, or use a water-treating chemical or substance, where it is found that such equipment, mechanism, chemical, or substance causes pollution or contamination of the domestic water supply. Such equipment or mechanism shall be permitted where equipped with an approved backflow prevention device or assembly.

  603.2 Approval of Devices or Assemblies. Before a device or an assembly is installed for the prevention of backflow, it shall have first been approved by the Authority Having Jurisdiction. Devices or assemblies shall be tested in accordance with recognized standards or other standards acceptable to the Authority Having Jurisdiction. Backflow prevention devices and assemblies shall comply with Table 603.2, except for specific applications and provisions as stated in Section 603.5.1 through Section 603.5.22.

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  WATER SUPPLY AND DISTRIBUTION

• CPC § 1505.10 High relevance — show source text

  1505.10 Hose Bibbs. Hose bibbs shall not be allowed on reclaimed (recycled) water piping systems. Only quick cou- plers that differs from those installed on the potable water system shall be used on the recycled water piping system in areas subject to public access . Quick couplers supplying reclaimed (recycled) water shall be marked with the words: “CAUTION: NONPOTABLE RECYCLED WATER, DO NOT DRINK,” and one of the symbol s in Figure 1505.10.

  Exception: In accordance with Health and Safety Code Sec- tion 8117 and Section 8118, hose bibbs are approved for use in cemeteries supplied with reclaimed (recycled) water. A hose bibb in an area subject to access by the general public shall be equipped with a sign marked “CAUTION: NON- POTABLE RECYCLED WATER, DO NOT DRINK,” and one of the symbols in Figure 1505.10.

  FIGURE 1505.10

  1505.11 Required Appurtenances. The recycled water supply system and the potable water system within the building and the premises shall be provided with the required appurtenances (e.g., valves, air/vacuum relief valves, etc.) to allow for testing as required for a cross-connection test in accordance with Section 1505.14.2 .

  1505.12 Pipe Separation in Trenches . Reclaimed (recycled) water pipes shall be permitted to be run or laid in the same trench as potable water pipes with 12 inches (305 mm) minimum vertical and horizontal separation where both pipe materials are approved for use within a building. Where piping materials do not meet this requirement, the minimum horizontal separation shall be increased to 48 inches ( 1220 mm). The potable water piping shall be installed at an elevation above the reclaimed (recycled) water piping. Reclaimed (recycled) water pipes laid in the same trench or crossing building sewer or drainage piping shall be installed in accordance with Section 609.0 and Section 720.0 of this code for water pipes .

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  ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

  dance with Section 1505.14.2.1 through Section 1505.14.2.4. The inspection and testing shall be per- formed by a cross-connection control specialist who has valid certification from a certifying organization recog- nized by the State Water Resources Control Board pur- suant to its Cross-Connection Control Policy Handbook. (1) Written reports of cross-connection inspections and testing shall be performed as provided in California Code of Regulations, Title 22, Section 60316.

  (2) A cross-connection test pursuant to Section 1505.14.2.2 shall be performed on the premises of a recycled water supply system when there is material reason to believe that the potable water system or recycled water supply system separation from _another water supply has been compromised.

• CPC § 1502.3.3 Medium relevance — show source text

  (3) The drain on the alternate water source system shall be checked for flow during the test and fixtures, potable and alternate water source, shall be tested and inspected for flow. Flow from an alternate water source system outlet indicates a cross-connection. No flow from a potable water outlet shall indicate that it is connected to the alternate water source sys tem.

  (4) The potable water system shall then be depressurized and drained.

  (5) The alternate water source system shall then be activated and pressurized. When an alternate water source is not available for the initial cross-connec- tion test, a temporary connection to a potable water supply shall be required. At the conclusion of the ini- tial cross-connection test, the temporary connection to the potable water supply shall be disconnected.

  (6) The alternate water source system shall remain pressurized for a minimum period specified by the Authority Having Jurisdiction while the potable water system is empty. The minimum period the potable water system is to remain depressurized shall be determined on a case-by-case basis, but in no case shall that period be less than 1 hour.

  (7) Fixtures, potable, and alternate water source shall be tested and inspected for flow. Flow from a potable water system outlet indicates a cross-connection. No flow from an alternate water source outlet will indicate that it is connected to the potable water system.

  (8) The drain on the potable water system shall be checked for flow during the test and at the end of the

  test.

  (9) Where there is no flow detected in the fixtures which would indicate a cross-connection, the potable water system shall be repressurized. 1502.3.3 Discovery of Cross-Connection. If a cross-connection is discovered, the following procedure, in the presence of the Authority Having Jurisdiction, shall be activated immediately:

  (1) Notify the Authority Having Jurisdiction of the cross connection.

  ( 2 ) The alternate water source piping to the building and its premises shall be shutdown at the meter, and the alternate water source riser shall be drained.

  ( 3 ) Potable water piping to the building and its prem- ises shall be shutdown at the meter.

  ( 4 ) The cross-connection shall be uncovered and disconnected.

  ( 5 ) The building and its premises shall be retested in accordance with Section 1502.3.1 and Section

  1502.3.2.

  ( 6 ) The potable water system shall be chlorinated with 50 parts-per-million (ppm) chlorine for 24 hours.

  ( 7 ) The potable water system shall be flushed after 24 hours, and a standard bacteriological test shall be performed. Where test results are acceptable, the potable water system shall be permitted to be recharged. 1502.4 Separation Requirements. Underground alternate water source service piping other than gray water shall be separated from the building sewer in accordance with this code. Pipes carrying treated nonpotable water shall be permitted to be run or laid in the same trench as potable water pipes with a 12 inch (305 mm) minimum vertical and horizontal separation where both pipe materials are approved for use within a building. Where horizontal piping materials do not comply with this requirement, the minimum separation shall be increased to 60 inches (1524 mm). The potable water piping shall be installed at an elevation above the treated nonpotable water piping.

• CPC § 1506.11 Medium relevance — show source text

  1506.11 Valves . . . . . . . . . . . . . . . . . . . . . .323

  1506.12 Signs . . . . . . . . . . . . . . . . . . . . . . .323

  1506.13 Inspection and Testing . . . . . . . . .323

  CHAPTER 16 NONPOTABLE RAINWATER

  CATCHMENT SYSTEMS . . . . . . .325

  1601.0 General . . . . . . . . . . . . . . . . . . . . .327

  1601.1 Applicability . . . . . . . . . . . . . . . . . .327

  1601.2 System Design . . . . . . . . . . . . . . .327

  1601.3 Permit . . . . . . . . . . . . . . . . . . . . . .327

  1601.4 Component Identification . . . . . . .327

  1601.5 Maintenance and Inspection . . . .327

  Table 1601.5 Minimum Alternate Water Source Testing, Inspection, and Maintenance Frequency . . . .327

  1601.6 Operation and Maintenance Manual . . . . . . . . . . . . . . . . . . . . .328

  1601.7 Minimum Water Quality Requirements . . . . . . . . . . . . . . . .328

  1601.8 Material Compatibility . . . . . . . . . .328

  1601.9 System Controls . . . . . . . . . . . . . .328

  1601.10 Separation Requirements . . . . . . .328

  1601.11 Abandonment . . . . . . . . . . . . . . . .328

  1601.12 Sizing . . . . . . . . . . . . . . . . . . . . . .328

  1602.0 Nonpotable Rainwater Catchment Systems . . . . . . . . . . .328

  1602.1 General . . . . . . . . . . . . . . . . . . . . .328

  1602.2 Plumbing Plan Submission . . . . . .328

  1602.3 System Changes . . . . . . . . . . . . .328

  1602.4 Connections to Potable or Reclaimed (Recycled) Water Systems . . . . . . . . . . . . . . .328

  1602.5 Initial Cross-Connection Test . . . .328

  1602.6 Sizing . . . . . . . . . . . . . . . . . . . . . .328

  1602.7 Rainwater Catchment System Materials . . . . . . . . . . . . . . . . . . . .329

  1602.8 Rainwater Catchment System Color and Marking Information . . .329

  1602.9 Deactivation and Drainage for Cross-Connection Test . . . . . . . . .329

  1603.0 Design and Installation . . . . . . . . .329

  1603.1 Rainwater Catchment Systems . . .329

  1603.2 Outside Hose Bibbs . . . . . . . . . . .329

  1603.3 Rainwater Catchment

  Collection Surfaces . . . . . . . . . . . .329

  1603.4 Minimum Water Quality . . . . . . . .329

• CPC § 1103.1 Medium relevance — show source text

  (3) Not less than two drains shall be installed in roof areas of 10 000 square feet (929 m [2] ) or less, and not less than one additional drain shall be installed for each 10 000 square feet (929 m [2] ) of roof area exceeding 10 000 square feet (929 m [2] ). (4) Each roof drain shall have a precalibrated, fixed (nonadjustable), and proportional weir (notched) in a standing water collar inside the strainer. No mechanical devices or valves shall be permitted. (5) Pipe sizing shall be based on the pre-calibrated rate of flow (gpm) (L/s) of the pre-calibrated weir for the maximum allowable water depth, and Table 1103.1 and Table 1103.2.

  (6) The height of stones or other granular material above the waterproofed surface shall not be considered in water depth measurement, and the roof surface in the vicinity of the drain shall not be recessed to create a reservoir.

  (7) Roof design, where controlled-flow roof drainage is used, shall be such that the design roof live load is not less than 30 lb/ft [2] (146 kg/m [2] ) to provide a safety factor exceeding the 15 lb/ft [2] (73 kg/m [2] ) represented by the depth of water stored on the roof in accordance with Table 1105.1(1). (8) Scuppers shall be provided in parapet walls. The distance of scupper bottoms above the roof level at the drains shall not exceed the maximum distances specified in Table 1105.1(2).

  (9) Scupper openings shall be not less than 4 inches (102 mm) high and have a width equal to the circumference of

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  STORM DRAINAGE

  the roof drain required for the area served, sized in accordance with Table 1103.1.

  (10)Flashings shall extend above the top of the scuppers.

  (11)At a wall or parapet, 45 degree (0.79 rad) cants shall be installed.

  (12)Separate storm and sanitary drainage systems shall be provided within the building.

  (13)Calculations for the roof drainage system shall be submitted along with the plans to the Authority Having Jurisdiction for approval.

  TABLE 1105.1(1) CONTROLLED-FLOW MAXIMUM ROOF WATER DEPTH

  ROOF RISE* (inches)	MAXIMUM WATER DEPTH AT DRAIN (inches)
  Flat	3
  2	4
  4	5
  6	6

  For SI units: 1 inch = 25.4 mm

  • Vertical measurement from the roof surface at the drain to the highest point of the roof surface served by the drain, ignoring a local depression immediately adjacent to the drain.

  TABLE 1105.1(2) DISTANCE OF SCUPPER BOTTOMS ABOVE ROOF

• CPC § 2025 Medium relevance — show source text

  An acceptable air supply for combustion and ventilation is necessary for the proper operation of fuel-burning appliances. A shortage of combustion air can result in incomplete combustion and the production of poisonous gases, such as carbon monoxide or appliance overheating. Ventilation air provides cooling for the appliance casing and internal controls. Inadequate ventilation of the space in which an appliance is installed can result in increased surrounding temperatures that stress the appliance itself or other appliances in the vicinity.

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  FORMAT OF THE UNIFORM PLUMBING CODE

  Chapter 6 Water Supply and Distribution.

  Chapter 6 regulates the design, material, and installation of water supply and distribution systems, including residential fire sprinklers. The water supply and distribution system is designed to achieve the correct water pressure and flow rates and avoid cross-connections. For fixtures to perform properly, an acceptable supply of potable water is essential to their operation and use. Cross-connections and backflow are ranked as the highest priority because of the long history of recognized health risks posed by cross-connections, outbreaks, or cases of waterborne disease. Piping materials and components are evaluated for their possible effect on the potable water with which they are in contact. The intent is to control the potential adverse health effects produced by indirect additives, products, and materials that come in contact with potable water. When selecting materials for water supply and distribution systems, consider water pressure, water temperature, compatibility with the water supply, durability, support, and sustainability.

  In addition, this chapter regulates the design, location, materials, and installation of multipurpose and stand-alone sprinkler systems that do not include the use of antifreeze. Where systems are installed as a portion of the water distribution system under the requirements of this chapter and are not provided with a fire department connection, backflow protection for the water supply system is not required.

  Chapter 7 Sanitary Drainage.

  This chapter regulates the design and installation of sanitary drainage systems to ensure they will work as intended. Drainage piping should not be oversized nor undersized, and constructed of approved materials to guard against fouling, deposit of solids, clogging, and with cleanouts so arranged that the pipes may be readily cleaned. The purpose of the sanitary drainage system is to remove effluent discharged from plumbing fixtures and other equipment to an approved point of disposal, such as a public sanitary system or private sewage disposal system.

  The basics of a sanitary drainage system include public and private sewage disposal; selection of materials; installation of the building drain and sewer; joining methods for pipe and fittings; drainage fixture units for sizing the drainage system; sumps and ejectors; vent sizing and length of vents; and testing.

  Chapter 8 Indirect Wastes.

  Chapter 8 regulates indirect waste connections that are required for plumbing fixtures and plumbing appliances dealing with food preparation, dishwashing, potable liquids, and similar equipment. An indirect connection prevents sewage from backing up into a fixture or appliance, thus providing protection against potential health hazards. The waste pipe discharges through an air gap or air break into a waste receptor or standpipe. The protection in the form of an air gap is necessary when the contamination is a potential health hazard or cross connection with the potable water system. Where there is no possibility of contaminating the potable water (nonpotable discharge), the indirect waste pipe may connect in the form of an air break.

• CPC § 1505.14.1 Medium relevance — show source text

  1505.14.1 Supply System Inspection and Test. Recycled water supply systems shall be inspected and tested in accordance with this code for testing of potable water piping. 1505.14.2 Cross-Connection Inspection and Test- ing. An initial visual inspection and an initial cross-con- nection test shall be performed on both the potable and recycled water supply systems before the initial opera- tion of the recycled water supply system. During an ini- tial or subsequent cross-connection test, the potable water system and recycled water supply system shall be isolated from each other and independently inspected and tested to ensure there is no cross-connection in

  accordance with Section 1505.14.2.2. Initial or subse- quent inspections or tests shall be performed in accor-

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  1505.9.2 Valve and Appurtenance Access Door Signs. Each reclaimed (recycled) water valve within a wall shall have its access door into the wall equipped with a warning sign approximately 6 inches by 6 inches (152 mm x 152 mm) with wording in approximately 3/8 inch (9.5 mm) letters on a purple background. The word- ing text and format of the sign shall be substantially the same as that specified in Section 1505.13.3. The signs shall be attached inside the access door frame and shall hang in the center of the access door frame. This sign requirement shall be applicable to any and all access doors, hatches, etc., leading to reclaimed (recycled) water piping and appurtenances.

  1505.10 Hose Bibbs. Hose bibbs shall not be allowed on reclaimed (recycled) water piping systems. Only quick cou- plers that differs from those installed on the potable water system shall be used on the recycled water piping system in areas subject to public access . Quick couplers supplying reclaimed (recycled) water shall be marked with the words: “CAUTION: NONPOTABLE RECYCLED WATER, DO NOT DRINK,” and one of the symbol s in Figure 1505.10.

  Exception: In accordance with Health and Safety Code Sec- tion 8117 and Section 8118, hose bibbs are approved for use in cemeteries supplied with reclaimed (recycled) water. A hose bibb in an area subject to access by the general public shall be equipped with a sign marked “CAUTION: NON- POTABLE RECYCLED WATER, DO NOT DRINK,” and one of the symbols in Figure 1505.10.

  FIGURE 1505.10

  1505.11 Required Appurtenances. The recycled water supply system and the potable water system within the building and the premises shall be provided with the required appurtenances (e.g., valves, air/vacuum relief valves, etc.) to allow for testing as required for a cross-connection test in accordance with Section 1505.14.2 .