Indirect waste shall be required for the discharge of all waste from:
Any refrigerator, ice-box, steam table, bar or soda fountain, swimming pool, swimming pool scum gutter, or
any receptacle, appliance, device or apparatus which is used for the storage, preparation, or processing of food
or drink. In a three-compartment bar or soda fountain sink, the ice compartment shall be separately trapped and
installed as an indirect waste line. The other two compartments shall be connected with a continuous waste, or
individual traps and waste lines installed as indirect waste lines in accordance with this Chapter. All drip waste
lines shall conform to Section P-904.5. The separation between the ice compartment and the nearest sink shall
be at least 2 feet.
Any appliance, device, or apparatus using water as a cooling or heating medium.
Any sterilizer, water still or other similar appliance, device or apparatus.
Any water treatment device, including filters and softeners.
Any water-operated device.
Any drain, overflow or vent from a water supply system.
Any drain for condensate or defrosting evaporators in air conditioning systems of having inlet in the air stream
of ventilating or air conditioning systems.
Any other device when required by the Department and the Department of Public Health for the protection of
the public health.
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.
Pipes, stacks, vents and connecting joints which conduct or are otherwise in contact with
corrosive waste shall be constructed of materials approved by the Department as capable of resisting the destructive
action of such waste.
Corrosive, toxic, or injurious waste shall not be discharged into a street sewer unless first
treated, diluted, or neutralized in accordance with the regulations of the Water Department to prevent injury to the
public sewer system and treatment works.
No waste containing radioactive substances shall be discharged into any portion of
a plumbing system, unless so treated, diluted or handled as the Department of Public Health prescribes by regulation
to prevent public health hazard.
Corrosive, toxic, or injurious waste or sanitary sewage not discharged into the
public sewer system or as prescribed in Chapter 14 shall be conveyed in a manner approved by the Department and
treated, diluted, neutralized, and disposed of in accordance with regulations of the Department of Health of the
Commonwealth and the Department of Public Health to ensure efficient and sanitary disposal and to prevent stream
pollution, discharge to the ground surface of contaminating substances, creation of offensive odors, contamination
of water supplies, and the creation of health hazards and nuisances.
Indirect waste stacks receiving fixtures on more than one floor or waste pipes longer
than 100 feet, or those draining more than one trapped fixture shall be vented through the roof as required by Chapter
11.
Steam pipes shall not connect to any part of a drainage or plumbing system and
water above 140 degrees F (60 degrees C) shall not be discharged into any part of a drainage system. Such pipes shall
discharge into an indirect waste receptor connected to the drainage system.
Corrosive liquids, spent acids or other harmful
chemicals that destroy or injure a drain, sewer, soil or waste pipe, or create noxious fumes or interfere with sewage
treatment processes shall not be discharged into the plumbing system without being thoroughly neutralized or treated
by passing through an approved neutralizing device. Such devices shall be automatically provided with a sufficient
supply of neutralizing medium so as to make the contents non-injurious before discharge into the drainage system.
The nature of corrosive or harmful waste and the method of its treatment shall be approved prior to installation.
