Instructions / Assembly

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Table 3. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of
BtuH (0.5” WC Pressure Drop) [Schedule 40 Metallic 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 ttings)
10' 20' 30' 40' 50' 60' 80' 100' 125' 150' 175' 200'
(3m) (6m) (9m) (12m) (15m) (18m) (24m) (30m) (38m) (45m) (53m) (60m)
1/2" 291 200 160 137 122 110 101 94 89 84 74 67
3/4" 608 418 336 287 255 231 212 197 185 175 155 140
1" 1,150 787 632 541 480 434 400 372 349 330 292 265
1 1/4" 2,350 1,620 1,300 1,110 985 892 821 763 716 677 600 543
1 1/2" 3,520 2,420 1,940 1,660 1,480 1,340 1,230 1,140 1,070 1,010 899 814
2" 6,790 4,660 3,750 3,210 2,840 2,570 2,370 2,200 2,070 1,950 1,730 1,570