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Old 10-30-2016, 10:55 AM   #1
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Gas Off


Main gas line in basement is hard to shut off. Iron valve. Anyway, Im quite sure that I got it perfectly at right angle.

To be sure, I watched the water heatrt pilot slowly go out.

So it sounds to you all that the gas is off in my house, right???
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Old 10-30-2016, 11:42 AM   #2
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Re: Gas Off


You may still have some seepage, but natural gas is piped in with mercaptan to alert your olfactory senses of a possible leak.
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Old 10-30-2016, 12:19 PM   #3
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Re: Gas Off


All the pilots will be out, and pilot valves will be closed. Any older ovens and ranges probably don't have pilot valves, and will be on. Check them first when you get gas back on. New ovens use electric ignition.

I'm assuming that you're disconnecting piping. Any piping left off for more then a few minutes then you should put cap with a bit of dope on the threads. Doesn't have to be super tight, it's a just in case, because those manual valves sometimes leak though slightly. (as in cu.in over days, so very slight)

Cheers!
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Old 10-30-2016, 12:35 PM   #4
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Re: Gas Off


There's always the soap bubble test.

Isn't there a tester made that the gas company carries to sense any trace of gas in a place?

Just to be sure ventilate the place, in case you do get a leak, you don't want it to build up.

Test your changed connections after turning the gas back on, using the soap bubble test.


ED
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Old 10-30-2016, 02:52 PM   #5
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Re: Gas Off


Quote:
Originally Posted by de-nagorg View Post
There's always the soap bubble test.

Isn't there a tester made that the gas company carries to sense any trace of gas in a place?

Just to be sure ventilate the place, in case you do get a leak, you don't want it to build up.

Test your changed connections after turning the gas back on, using the soap bubble test.


ED
If the OP is shutting off a valve, then disconnecting a pipe, the sniffer and soap will be useless. There will be residual gas left in the pipe, at 100% concentration, so the sniffer will go off, regardless.

The code here says that the pipe must be capped, unless you're actively working on it. Even if there's a valve that's shut off.

But to answer your question, yes the sniffer is quite sensitive, and not cheap for the DIYer. Sensitive enough to pick up trace methane from plumbing vents. It MUST be calibrated to outdoor fresh air each and every time though, or it's useless.

Cheers!
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