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Old 07-09-2006, 09:05 PM
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Default running your own gas pipe...

Anyone here done gas plumbing? Is it something that is safe to DIY?

I am looking to pipe in an LP range for a buddy, and from what I can tell, it looks pretty simple.

Pipe dope, instead of teflon tape. Pipe straps every 8' (for 3/4" pipe) Outside termination can't be any closer than 6" from the ground. To thread, I read somewhere you go as tight as you can by hand, then wrench it 1 full turn, much tighter can distort the pipe, since they are tapered threads.

spray the joints with soapy water after charging the line with 15psi of air and check for bubbles..., and a WOG rated valve(means water oil and gas?)

It looks pretty simple, but I don;t want to blow myself up either. I can't justifying paying some guy $100 an hour to do something that has 3 elbows.


Am I nuts? (for thinking about doign it myself, not for all the other reasons that are obvious in my character.) Am I missing anything important?
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Old 07-09-2006, 09:18 PM
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Quote:
Originally Posted by Jake
Anyone here done gas plumbing? Is it something that is safe to DIY?

I am looking to pipe in an LP range for a buddy, and from what I can tell, it looks pretty simple.

Pipe dope, instead of teflon tape. Pipe straps every 8' (for 3/4" pipe) Outside termination can't be any closer than 6" from the ground. To thread, I read somewhere you go as tight as you can by hand, then wrench it 1 full turn, much tighter can distort the pipe, since they are tapered threads.

spray the joints with soapy water after charging the line with 15psi of air and check for bubbles..., and a WOG rated valve(means water oil and gas?)

It looks pretty simple, but I don;t want to blow myself up either. I can't justifying paying some guy $100 an hour to do something that has 3 elbows.


Am I nuts? (for thinking about doign it myself, not for all the other reasons that are obvious in my character.) Am I missing anything important?
unless your a moron i think you'll be ok...don't forget your dirt legs
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Old 07-09-2006, 10:12 PM
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Are you plumbing it into an existing gas system, or a small tank just for the range? It sounds like you've got the piping pretty well figured out, the only thing that I would do different is that when you pressurize the line, leave a pressure guage on it. Let it sit for 15 min., if there is no drop in pressure, no leaks. One caution on pressure testing-leave the cutoff at the range closed. Most appliances are not rated for more than 2 psi, so a 15 psi pressure test can damage them. I don't know what the permit or inspection requirements are in your part of the country, so you may want to check on that locally. Around here, a lot of gas piping is done without permits even when they are required.
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Old 07-09-2006, 11:16 PM
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There is a gas rated teflon tape available, it's the yellow stuff. Don't use galvanized, use black iron pipe. I run a pipe support every 4', I believe I read in my plumbing book ( out on loan, so I can't verify) that 4' is code in a lot of places.
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Old 07-10-2006, 09:59 AM
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At least in my neck of the woods...

You can do it yourself as it is no big deal as long as you PSI check with compressed air.

HOWEVER....

The local NG gas company will not hook up service (and it is a fineable offense if you hook it up yourself) unless a certified plumber did the work or you have one sign off on it. The signing off on I tried but most would not as it transfers liability to them if they certify it and it turns up bad.



You mileage may vary of course.



Now if it is propane then you probably could since the NG company is not involved.


Steven
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Old 07-10-2006, 12:01 PM
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Thanks, I feel better about attemptins this, and since I am only mildly retarded... I suspect it will go well. It is propane, so I am the only one who's inspection it has to pass.
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Old 08-01-2006, 01:28 AM
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ok...So I ran the pipe... pressure tested it 15 lbs for 1/2 hour... did fine. left the air in and came back today, guage at 12... is that bad?

Not only that, but I spent all day farting around with nipples and 90's to make it go around a corner and off a deck, and the guy says,"can you just drill a hole in the deck and go straight down? It's only money man... it's only money. So I will have to redo part... Still though, what about losing 3 lbs over the weekend.. is that something to worry about? I think the actual pressure is .5 lbs or something like that.... could I have lost that through the ball valve in the kitchen?

I did build a tricky deal though... I took a piece of 3/4 black pipe and welded a washer to the end. Ran a piece of roundstock though that and welded the roundstock to an old forsner bit (1 1/4") and used the pipe to center and push the drill bit the length of the wall I was drilling... the result was a nice straight line of holes through the wall and no fighting black pipe to get it through the wall...

I think when I am done, I will use it to harpoon a whale... I kinda looks like one....
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Old 08-01-2006, 07:14 AM
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Losing pressure is bad, but a lot of things can affect it. Temperature differences between night and day will bring the gauge down, but it will come back up as the temperature rises. I have seen some new gauges that will have a slow leak inside the gauge.
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Old 08-01-2006, 07:35 AM
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If it holds pressure for 15 minutes consider it a done deal. Foot cited a few things that would affect pressure over that length of time. Also, if you still are worried do a soap test at all joints. But that is why they put mercapton? in NG.

If all else fails your nose will alert you..

Most areas of the country don't run more than 1/4 PSI. You could hand tighten the joints using rector seal and not get a leak...
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Old 08-01-2006, 12:44 PM
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Well, I will re-run the pipe down through the deck and re-test it, then we will see how it works...

THanks for the advice guys... this is easier than I thought it would be. You think gas, and you can get freaked out, but it was't that tough.
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