Posted by Fixerupper on October 17, 2012 at 18:35:08 from (188.8.131.52):
I'll be burying a propane line to a building Saturday and I'm a little inept at knowing what size to use. The heater will be no bigger than 150000 BTU. I'll probably end up with 100000. There will be about 250' of gas line between the tank and the heater. Is 1/2" ID about right? Or will 3/8 do the job? I'm burying copper and I was told schedule K is what I should use. Copper is $$$. Is there any other choice that's cheaper but still good? I want this up to snuff and I can pay the extra price for copper but a penny saved is a penny earned, so I've been told. Thanks.
I posted about this a few weeks ago, but I'm burying an air line too in a separate trench. I decided on 3/4" pex rated at 160 PSI@75 degrees for the airline. The airline will be galvanized after it's in the building. The pex will be inside 1 1/2" gray conduit in 10' lengths that I'm gluing together. The gray conduit looked like about the most economical at $3.62 per 10 foot length. The run is 140'. Looks like I'll have to gradually slope the conduit out of the trench on both ends but there's room do do it that way. Jim
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