Capping a gas line

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Old 06-06-13, 08:09 PM
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Capping a gas line

Hi,

I am taking out an old natural gas pool heater that does not work. I am not going to put in a new one, at least not now. The heater is that black thing on the right side of the picture. Is it as simple as unscrewing the "union" in the middle and putting on a black iron cap over some yellow teflon tape?

Thanks!

 
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Old 06-06-13, 09:21 PM
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Remove the union completely. The little nipple may come with it. No problem. Then use whatever cap or plug you need for the situation. And yellow Teflon tape should be ok. If you have the right 'goop', use both. Natural gas is a low pressure system. Turn the gas back on, ASSUMING you already turned it off, use a soap and water solution and spray or brush on and look for leaks.
 
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Old 06-06-13, 09:42 PM
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OK, thanks! I'll just use yellow tape since I already have some.
 
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Old 06-07-13, 05:43 AM
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That sure looks like galvinized pipe to me that should not have been used for a gas line, black iron only.
There's also no drip leg.
 
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Old 06-07-13, 06:20 AM
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And it looks like that pipe feeds the mechanism only. So maybe consider removing more pipe to get it out of the way, then cap or plug it off. And yes, Joe, I don't know about the east coast, but on the west I've seen plenty of galvy pipe used for gas -- on older homes, and I'm not talking Victorian older.
 
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Old 06-07-13, 07:11 AM
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To the OP... Post # 4 may be misleading.


That sure looks like galvinized pipe to me that should not have been used for a gas line, black iron only.
There's also no drip leg.

Joe some municipality's require galv over black pipe. Also with drip legs. Some are not allowed outside. Moisture will freeze in the drip leg in winter months and crack the gas line.

If you do not know the codes, or have a rough idea what you are talking about, it might be best not to comment.
 
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