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Section P-1202 Indirect Waste Pipes
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Indirect waste pipes shall be installed in conformance with the provisions of this code governing sanitary-drainage piping.
Indirect waste pipes shall discharge into and above the flood level of a trapped open sink or approved receptacle, properly supplied with water, which shall be vented where required by this code and which shall be located in an accessible ventilated place. An air gap shall exist between the outlet end of the waste pipe and the flood-level rim of the receiving sink or approved receptacle. The air gap in each instance shall be at least twice the diameter of the indirect waste pipe. If the indirect waste has sufficient year-round flow to maintain the trap seal, the sink or receptacle need not be supplied with water. The area of the receptor drain line shall be equal to or greater than the total area of all lines discharging into it. The size of the receptor drain line shall be a minimum of 2- inches and the receptor shall be of such size as to prevent overflowing of the receptor, but in no case shall it be less than 2".
Water lifts, expansion tanks, cooling jackets, drip or over-flow pans, or similar devices which waste clear water only, shall discharge onto a roof, into a sump, or drain into a trapped fixture or receptacle. Drains from sprinkler systems shall be discharged onto a roof, into a sump, or drain into a trapped fixture or receptacle. Drains from sprinkler systems shall be discharged onto a roof, into a sump or over an open trapped outlet of sufficient size to permit maximum flow from the drain under full system pressure without overflowing.
Fixture or receptacles receiving indirect wastes shall not be located within living quarters, and no indirect waste shall discharge into a lavatory, water closet, urinal, bathtub, shower, drinking fountain, or other similar fixture in use for its customary purpose.
A drain for receiving condensate from air conditioning systems shall be permitted to discharge into a laundry tray fixture or service sink fixture in accordance with Section P-1202.2. In one-family and two-family residences, the condensate water shall be permitted to discharge onto a seeded area that is part of the property where the air conditioning system is located.
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The air gap between the indirect waste pipe and the flood level rim of the waste receptor shall be not less than twice the effective opening ...
Plumbing Code 2018 of Philadelphia > 8 Indirect/Special Waste > 802 Indirect Wastes > 802.3 Installation > 802.3.1 Air Gap
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sinks shall discharge through an indirect waste pipe as specified in Sections 802.1.1 through 802.1.7. Fixtures not required to be indirectly ...