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Table 13
Propane Gas Pipe Sizing, High-Pressure, 2-Stage Regulation
Distance from Tank
Regulator Outlet to
Heater Gas Valve
Inlet
Model
TR250LP
TR400LP
Btu/hr Input
250,000
400,000
Line Material
Iron Pipe
Tubing
Iron Pipe
Tubing
First Stage*
0 to 50 ft
1/2”
1/2”
1/2”
1/2”
50 to 100 ft
1/2”
1/2”
1/2”
5/8”
100 to 150 ft
1/2”
1/2”
1/2”
5/8”
Second
Stage**
0 to 10 ft
1/2”
3/4”
3/4”
7/8”
*Based upon an inlet gas pressure of 10 psig at a pressure drop of 1 psi
**Based upon an inlet gas pressure of 11 in-wc at a pressure drop of 0.50 in-wc
