11
Table 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of
BtuH (0.5” WC Pressure Drop)
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'
0'
80'
90'
100'
125'
150'
200'
(3m)
(6m)
(9m) (12m) (15m) (18m) (21m) (24m) (2m) (30m) (38m) (45m) (60m)
1/2"
25
189
152
129
114
103
96
89
83
8
69
63
55
3/4"
56
393
315
26
23
21
196
185
13
162
146
132
112
1"
1,01
32
590
504
448
409
38
346
322
30
25
252
213
1 1/4" 2,205 1,496 1,212
1039
913
834
1
24
6
630
56
511
440
1 1/2" 3,30 2,299 1,858 1,559 1,41 1,25 1,181 1,086 1,023
976
866
8
65
2"
6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,04 1,921 1,811 1,606 1,496 1,260
