Water Distribution System Design Criteria Required Capacities at Fixture Supply Pipe Outlets
Fixture Supply Outlet Serving
|
Flow Rate a
|
Flow Pressure (psi)
|
Bathtub
|
4
|
8
|
Bidet
|
2
|
4
|
Combination fixture
|
4
|
8
|
Dishwasher, residential
|
2.75
|
8
|
Drinking fountain
|
0.75
|
8
|
Laundry tray
|
4
|
8
|
Lavatory
|
2
|
8
|
Shower
|
3
|
8
|
Shower, temperature controlled
|
3
|
20
|
Silkock, hose bibb
|
5
|
8
|
Sink, residential
|
2.5
|
8
|
Sink, service
|
3
|
20
|
Urinal, valve
|
15
|
20
|
Water closet, blow out, flushometer valve
|
35
|
25
|
Water closet, flushometer tank
|
1.6
|
20
|
Water closet, siphonic, flushometer valve
|
25
|
25
|
Water closet, tank, close coupled
|
3
|
8
|
Water closet, tank, one piece
|
6
|
20
|
Water closet, tank, pressure assist
|
3
|
25
|
|
For SI: 1 psi = 67.895 kPa, 1 gallon per minute (gpm) = 3.785 L/m.
a) For additional requirements for flow rates and quantities, see § 18-29-604.4.