23
Table 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of
BtuH (0.5” WC Pressure Drop) [Schedule 40 Metalic Pipe]
For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
Final Check
When the installation is complete, verify that inlet gas pressure for the entire gas system does not
drop below 5” WC for NG or 8” WC for LP at all appliances. This can be tested by turning on all
gas burning appliances including the water heater, then check the inlet pressure at each appliance
to verify all appliances are receiving a minimum of 5” WC for NG or 8” WC for LP. If all appliances
are not receiving the minimum inlet pressure the gas piping system may need to be changed.
CAUTION
Pipe
Size
Length (including fittings)
10'
20'
30'
40'
50'
60'
70'
80'
90'
100'
125'
150'
200'
(3m)
(6m)
(9m)
(12m)
(15m)
(18m)
(21m)
(24m)
(27m)
(30m)
(38m)
(45m)
(60m)
1/2"
275
189
152
129
114
103
96
89
83
78
69
63
55
3/4"
567
393
315
267
237
217
196
185
173
162
146
132
112
1"
1,071
732
590
504
448
409
378
346
322
307
275
252
213
1 1/4"
2,205
1,496
1,212
1039
913
834
771
724
677
630
567
511
440
1 1/2"
3,307
2,299
1,858
1,559
1,417
1,275
1,181
1,086
1,023
976
866
787
675
2"
6,221
4,331
3,465
2,992
2,646
2,394
2,205
2,047
1,921
1,811
1,606
1,496
1,260