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Old 04-06-2016, 11:10 AM   #1
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Plumb Gas Line to New Pool Heater


I plan to replace my pool heater this weekend, and just wanted to get feedback before I begin.

I plan to plumb the gas myself, because the line already exists, and it appears to be a straight forward job. I don't believe there is a question of capacity on the existing line because it goes directly to the gas meter.

The gas input to the new heater is roughly in the same place as this photo, but the dimensions are slightly different. The new heater is 8" narrower, which will provide more clearance between the gas line and the heater cabinet (which are currently touching).

In the photo below, the gas line traced with the green line will not be changed in any way, including the tee. The gas line traced with the yellow line will all be replaced with new pipes, fittings, a union, and a shutoff valve in the same config (with regards to the union, shutoff valve, elbows, etc.)

I'm going to buy the parts at Home Depot. I will need a very specific length of pipe that attaches to the heater's gas valve, extending out of the heater cabinet, and I will have Home Depot custom cut and thread that pipe.

I will use Leak Lock Pipe Joint Sealant on male threads.

I will test the plumbing with soapy water.

Any thoughts before I embark?
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Old 04-06-2016, 11:45 AM   #2
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Re: Plumb Gas Line to New Pool Heater


Keep the old valve. There is nothing there to wear out and it's better than any new valve available today from who knows where. Use seamless schedule 40 pipe and blow it out before connecting and blowing debris into the heater.
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Old 04-06-2016, 11:42 PM   #3
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Re: Plumb Gas Line to New Pool Heater


The galvanize sold at home depot is not approved for gas, at least not the one sold down here.
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Old 04-07-2016, 10:34 PM   #4
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I would put the union after the gas valve to make it easier to service the new pool boiler in the future, should it need it, without shutting down the entire system. I'd also replace the old valve with a full port ball valve. What you have there will start leaking once the grease dries up. The grease may have even dried up already and once turned will leak, or may soon afterwards. You could get the approved grease and gun, but why bother when you can just install a maintenance free ball valve?
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Old 04-11-2016, 08:49 AM   #5
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Re: Plumb Gas Line to New Pool Heater


Thank you all for your comments. Mission accomplished, it was easier than I thought, and tested leak free the first time. We enjoyed an 80 degree pool all weekend, and I replaced a heater myself for $1,725 total (pool service company quoted $4,250).
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Old 04-11-2016, 08:53 AM   #6
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Re: Plumb Gas Line to New Pool Heater


Pics.
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Old 04-11-2016, 12:06 PM   #7
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Re: Plumb Gas Line to New Pool Heater


Awesome! Nice work. This is good inspiration because at some point I'll be adding a line for a gas stove.
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