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Old 11-02-2011, 10:58 PM   #1
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DIY LP piping question


So I decided to ditch the gas company and their giant oversized (for me anyways) tanks in lieu of a smaller setup. The only thing I am running on gas is my fireplace insert and it seems like I don't use it as much as the gas company would have liked (they wanted me to fill my 2 250lb tanks twice a year!) I've dealt w/ DIY plumbing before successfully, but never anything that carried flammable gas/liquid.

My blueprint looks something like this:
40lb tank -> 2 stage regulator -> Shutoff Valve -> Gas Insert

So I'm bringing three questions to the table:

When they came to haul away the tanks they left me w/ an uncapped pipe outside (jerks!). I've capped the pipe since, but not before the first rains of the season - I dried the couple beads of moisture I could see - but I'm sure the lines remain humid inside... The lines are 1/2in OD piping - will this be an issue? If so, how do I take care of this?

It seems to me that my biggest hurdle is bleeding the lines once I install everything... My initial thought was to open everything up and let the gas flow for a few minutes, then shut it back down and let the gas escape for a couple hours, then try to light things up - but - my wife (who is already upset enough that we can't have a fire) would probably kill me if I blew up the house.... Am I on the right track or is there a better/safer way to do this?

Lastly, since I'm going to be taking the tanks to a dealer to fill, should I install some sort of shutoff between the regulator and the tank to prevent having to bleed the lines again?

Thanks in advance,
Dan

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Old 11-03-2011, 06:40 AM   #2
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DIY LP piping question


Most codes seriously frown on DIY gas workers. They insist that all gas work be done by licensed workers. The hazards are great if there are mistakes and too often, deadly.

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Old 11-03-2011, 11:43 AM   #3
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DIY LP piping question


While I can definitely appreciate the need for a certified individual to perform tasks such as initial installation of a system, I'm hesitant to believe that I can't safely accomplish this task myself; after all, I routinely hook my LP Tank up to my gas grill and have changed parts out on it before with no problems. If I was going to be doing anything with the piping, inside shutoff valve or the insert itself I would surely seek professional assistance. I'm not underestimating the potential hazards, or I wouldn't be asking for advice before I undertook this project.

With that said, my questions above stand.

Regards,
Dan
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Old 11-03-2011, 07:49 PM   #4
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DIY LP piping question


The moisture in the lines is no problem. I only cap gas lines after I disconnect hem to prevent people smelling gas and calling it in as a gas leak. As for purging your line, the proper way to do this is with a purge hose to the outdoors, or you can purge it directly to the fp's pilot light, although this may take a long time to do depending on how long your piping is. Remember, propane is 1.5 times the weight of air, so it will pool up in low areas, unlike natural gas which will just float away.
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Old 11-03-2011, 10:22 PM   #5
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Originally Posted by hvac benny View Post
The moisture in the lines is no problem. I only cap gas lines after I disconnect hem to prevent people smelling gas and calling it in as a gas leak. As for purging your line, the proper way to do this is with a purge hose to the outdoors, or you can purge it directly to the fp's pilot light, although this may take a long time to do depending on how long your piping is. Remember, propane is 1.5 times the weight of air, so it will pool up in low areas, unlike natural gas which will just float away.
Thanks Benny! That's exactly what I needed.
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