603.5.2 Connections.

Corporation stops, wet connections, or other connections to a street main shall be made only by employees of the Department of Environmental Protection. The cost of the installation shall be borne by the owner of the property for which the connection is made.

Section PC 604: Design of Building Water Distribution System

604.1 General.

The design of the water distribution system shall conform to accepted engineering practice.

604.2 System interconnection.

At the points of interconnection between the hot and cold water supply piping systems and the individual fixtures, appliances or devices, provisions shall be made to prevent flow between such piping systems.

604.3 Water distribution system design criteria.

The water distribution system shall be designed, and pipe sizes shall be selected such that under conditions of peak demand, the capacities at the fixture supply pipe outlets shall be not less than shown in Table 604.3. The minimum flow rate and flow pressure provided to fixtures and appliances not listed in Table 604.3 shall be in accordance with the manufacturer's instructions.

Table 604.3
Water Distribution System Design Criteria Required Capacity at Fixture Supply Pipe Outlets

Fixture Supply Outlet Serving	Flow Rate a (gpm)	Flow Pressure b (psi)
Bathtub, no shower	4	20
Bathtub with anti-scald protection	4	20
Bidet	1.5	20
Combination fixture	4	8
Dishwasher, residential	2.75	8
Drinking fountain	0.75	8
Laundry tray	4	8
Lavatory, private	1.5	8
Lavatory, private, mixing valve	1.5	8
Lavatory, public	1.5	8
Shower	2	8
Shower, balanced-pressure, thermostatic or combination balanced-pressure/thermostatic mixing valve	2 b	20
Sillcock, hose bibb	5	8
Sink, residential	2.2	8
Sink, service	3	8
Urinal, valve	18	20
Water closet, blow out, flushometer valve	25	25
Water closet, flushometer tank	3	20
Water closet, siphonic, flushometer valve	25	25
Water closet, tank, close coupled	3	15
Water closet, tank, one piece	3	20

 

For SI: 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 3.785 L/m.

a.   For additional requirements for flow rates and quantities, see Section 604.4.

b.   Where the shower mixing valve manufacturer indicates a lower flow rating for the mixing valve, the lower value shall be applied.