Trying to figure out largest NG heater I can run . I have 2psi pressure 180’ length 3/4” pipe. Thanks
Any gas line gurus in here ?
- Thread starter Mcaveman
- Start date
For the smallest Hayward H Series Nat Gas heater made (150k BTU) at 180'..........a minimum diameter of 1-1/4" is required. Truly sounds like you have a BBQ line and they can't handle much BTU at all.
For 3/4" pipe at 2 psi, you can use a 400,000 btu per hour heater.
This is a two stage system where you would have a regulator near the heater that steps down the pressure to heater inlet pressure.
3/4” pipe at 200 feet will carry 642 cubic feet per hour at 2 psi, which is about 642,000 btu/hr.
If the gas was low pressure, then you would need at least 1.5" pipe for 400,000 btu/hr.
This is a two stage system where you would have a regulator near the heater that steps down the pressure to heater inlet pressure.
3/4” pipe at 200 feet will carry 642 cubic feet per hour at 2 psi, which is about 642,000 btu/hr.
If the gas was low pressure, then you would need at least 1.5" pipe for 400,000 btu/hr.
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I know the charts don't support this and I did it more as a test than anything... I have a 100,000 BTU hayward running on 50' of 1/2" od line. teed off of a 1/2" black pipe line feeding my grill. I have clocked the heater at the full !00,000 BTU several times. Not sure of my line pressure but, I have never asked for an upgrade.
Dan
Dan
