// CODE SNIPPET
P-811.3 Minimum Water Supply Sizes to Flushometers
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The maximum number of water closet flush valves allowed
to be supplied from a single source shall conform to the schedule of pipe sizes and water pressures listed in Table P811.3.
Note a: Numbers shown in parentheses designate maximum allowed distance of fixtures from pneumatic tank or underground main.
Note b: See Section P-811.3.2
First Floor Above Groundb | |||||||
---|---|---|---|---|---|---|---|
Pneumatic Tank or Underground Main Pressure Using Iron Pipe |
Ferrule Size | ||||||
1" | 1-1/2" | 2" | 3" | 4" | 6" | 8" | |
30 psi | 1 (200') | 2 | 12 | 50 | 180 | 450 | |
40 psi | 1 (25') | 1 (400') | 4 | 24 | 80 | 220 | 450 |
50 psi | 1 (50') | 1 | 7 | 40 | 110 | 220 | 450 |
60 psi | 1 (75') | 2 | 7 | 40 | 110 | 220 | 450 |
70 psi | 1 (100') | 3 | 7 | 40 | 110 | 220 | 450 |
First Floor Above Groundb | |||||||
Pneumatic Tank or Underground Main Pressure Using Copper Tubing |
Ferrule Size | ||||||
1" | 1-1/2" | 2" | 3" | 4" | 6" | 8" | |
30 psi | 1 (250') | 3 | 15 | 55 | 200 | 450 | |
40 psi | 1 (30') | 1 (500') | 6 | 30 | 110 | 220 | 450 |
50 psi | 1 (65') | 2 | 9 | 40 | 110 | 220 | 450 |
60 psi | 1 (100') | 3 | 9 | 40 | 110 | 220 | 450 |
70 psi | 1 (135') | 4 | 9 | 40 | 110 | 220 | 450 |
Note a: Numbers shown in parentheses designate maximum allowed distance of fixtures from pneumatic tank or underground main.
Note b: See Section P-811.3.2
For each floor above the first floor, deduct 10 psi from the tank or main pressure.
Two urinals shall be counted as one water closet.
Related Code Sections
P-811.3 Water Supply and Distribution, Minimum Water Supply Sizes to Flushometers
pressures listed in Table P811.3.
TABLE P-811.3 —
MINIMUM WATER SUPPLY SIZES TO FLUSHOMETERS a
First Floor Above Ground b ...
Philadelphia Plumbing Code > 8 Water Supply and Distribution > P-811 Water Supply Fixtures > P-811.3 Minimum Water Supply Sizes to Flushometers
P-811.4 Water Supply and Distribution, Existing Installations
On existing installations, the water supply connected to flushometers shall be
permitted without increasing the size of the ferrule, provided a tank ...
Philadelphia Plumbing Code > 8 Water Supply and Distribution > P-811 Water Supply Fixtures > P-811.4 Existing Installations