“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.
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| 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
| 2 PSI @ 1000 BTU Per CU. FT. | |||
| MAXIMUM EQUIVALENT PIPE LENGTH | |||
| 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. |
| 5 PSI @ 1000 BTU Per CU. FT. | |||
| MAXIMUM EQUIVALENT PIPE LENGTH | |||
| 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. |
Stage Two Low Pressure
| 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. |
| 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. |
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