HEATER GAS SUPPLY AND PIPE SIZING INFORMATION ENGINEERING DATA
In many Propane gas line installations, the gas supplier and or installer will utilize a two stage regulation process whereby, at the supply tank, they will install the first stage gas regulator, which would be at a higher pressure, usually 10 psi. This higher pressure allows for much longer distance and in a much smaller pipe size. Then, within a short distance from the pool heater, generally around 24 inches, a second regulator, which is the second stage, would be installed and set at the required inlet pressure of the heater. “RESIDENTIAL” PROPANE GAS 2 STAGE REGULATION
SEE “GAS PRESSURE REQUIREMENT CHART.”
Stage One “High Pressure” Gas Pipe Sizing 10 PSI @ 2500 BTU Per CU. FT. MAXIMUM EQUIVALENT PIPE LENGTH
Stage Two “Low Pressure” Gas Pipe Sizing Stage 2 set at 14 in. W.C. MAXIMUM EQUIVALENT PIPE LENGTH Model 0 to 10 Feet 10 to 20 Feet 75 through 400 3/4 in. 3/4 in.
Model
0 to 50 Feet 50 to 100 Feet 100 to 150 Feet
75 through 400 1/2 in.
1/2 in.
1/2 in.
“RESIDENTIAL” NATURAL GAS 2 STAGE REGULATION
In many Natural gas line installations, the gas supplier and or installer will utilize a two stage regulation process whereby, at the street’s main gas supply, they will install the first stage gas regulator, which would be at a higher pressure. This higher pressure is usually set at 2 psi or 5 psi and can be run for long distances and in a much smaller pipe size. Then, within a short distance from the pool heater, generally around 24 inches, they will install a second regulator, which is the second stage. This second stage regulator would be set at the minimum operating pressure for the heater. For “Natural Gas Pentair Pool Heaters” the minimum is 7 inches W.C.
Stage One “High Pressure” Gas Pipe Sizing 2 PSI @ 1000 BTU Per CU. FT. MAXIMUM EQUIVALENT PIPE LENGTH
Stage Two “Low Pressure” Gas Pipe Sizing Stage 2 set at 7 in. W.C. MAXIMUM EQUIVALENT PIPE LENGTH Model 0 to 5 Feet 0 to 15 Feet 75 through 300 3/4 in. 1 in. 350 & 400 1 in. 1 in.
Model
0 to 20 Feet 20 to 90 Feet 90 to 200 Feet
75 through 400
3/4 in.
1 in.
1-1/4 in.
Stage One “High Pressure” Gas Pipe Sizing 5 PSI @ 1000 BTU Per CU. FT. MAXIMUM EQUIVALENT PIPE LENGTH
Stage Two “Low Pressure” Gas Pipe Sizing Stage 2 set at 7 in. W.C. MAXIMUM EQUIVALENT PIPE LENGTH Model 0 to 5 Feet 0 to 15 Feet 75 through 300 3/4 in. 1 in. 350 & 400 1 in. 1 in.
Model
0 to 50 Feet 50 to 100 Feet 100 to 200 Feet
75 through 400
3/4 in.
3/4 in.
3/4 in.
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