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Old 03-31-2010, 03:32 PM   #29
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Originally Posted by Ellie & Carl View Post
Black pipe will rust to a point... then the collected rust actually acts to seal the pipe. That's why you never see black pipe rust through. I'm glad I found this thread, as I was leaning toward replacing my main line with the black pipe. I've done a lot of gas/propane piping and used black pipe for the main delivery line - even in direct bury situations - then used copper with in-line shut-offs for each appliance.
If it can handle being buried in the ground, I suspect it will do nicely on the underside of an AS.
One more thing just occurred to me: I had a 1963 Ideal travel trailer and its gas was hard piped right up to the appliances... just as if it were in a stick-built house. Short run... furnace, stove and refer only and all forward of the axles. I don't know if it was original or re-done... but that's how it was when I bought her.
Don`t know what code is used in Wa,I have been a plumber in several different states,only way I`ve ever been able to bury black pipe was to tape with asphalt tape
then paint with asphalt,another way was plastic coated pipe,then tape and paint the joints. Dave
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Old 04-04-2010, 10:30 AM   #30
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What are you calling construction grade ? L copper is is the industry standard,unless it is a Government job and a crazy architect designates K copper,both can be bought as hard 20' lengths,or soft 60' lengths,but you can only flare soft copper. Dave

you can flare hard copper you just have to aneal it first to make it soft.
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Old 04-04-2010, 11:29 AM   #31
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Originally Posted by gmwelder86 View Post
you can flare hard copper you just have to aneal it first to make it soft.
I had to look this up. Good info though. Thanks!

YouTube - Copper Annealing
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Old 04-22-2010, 06:51 PM   #32
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what about copper tibing sizes? I'm rebuilding a bubble and have the same copper tubing size question. is there a flow problem if 3/8" is used from the dual regulater and branched off for 3 things. i will be hooking up a princess stove, norcold fridge, and a catalytic heater all of which have 3/8" fittings. do i need to use 1/2" for more flow under the trailer untill i get it through the trailer and reduce it down for the fittings? regards--ted
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Old 04-23-2010, 01:06 AM   #33
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what about copper tibing sizes? I'm rebuilding a bubble and have the same copper tubing size question. is there a flow problem if 3/8" is used from the dual regulater and branched off for 3 things. i will be hooking up a princess stove, norcold fridge, and a catalytic heater all of which have 3/8" fittings. do i need to use 1/2" for more flow under the trailer untill i get it through the trailer and reduce it down for the fittings? regards--ted

Here's a chart that explains it.

Add up the BTU/hr ratings for your three appliances and see. Looks like you'll be fine, off the top of my head, but do the math.

- Bart
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