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Old 08-05-2008, 11:06 AM   #1
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What type of PEX Tubing is best for an underground run?

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Old 08-05-2008, 11:44 AM   #2
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Pex is pex, type does not matter.

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Old 08-05-2008, 11:51 AM   #3
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Thanks, that what I thought but had to make sure.
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Old 08-06-2008, 12:00 AM   #4
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I personally would prefer the type without the metal bands for under the dirt, but thats just me.
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Old 08-06-2008, 06:17 AM   #5
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I've never seen a problem with the stainless bands being buried. Copper I have never seen but would imagine it's a little more prone to corrosion then SS.
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Old 08-06-2008, 10:16 AM   #6
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We use Sharkbites underground with no problems to date.
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Old 08-07-2008, 05:13 PM   #7
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I'm considering a rather large scale plumbing improvement to a SW KS vacation home (yep, I'm the guy who spent a small fortune in retrofits to be able to install a whole-house HWOD ). The plans for NEXT summer include a new supply line from the meter to the house, replacing the water supply pipes with a non-metallic product (more on that to come--read on), and installing underfloor radiant heating from the basement where I have full access to the ground floor's floor joists.

I've read PEX expands almost 2' for every 100' of product when it heats up (causing noises within the house from the expansion), so I plan on using Onix tubing for the radiant heating (and, if possible, for the water supply lines). Onix seems to be more costly until you find out the product does not require any heat transfer plates, and the fittings require very inexpensive tools (if you already have an automotive torque wrench that is calibrated in in/ft, you're ready to go!!!).

My question at this point regards the supply line from the meter to the house--this Onix product looks for all the world like a very high quality, 5 ply garden hose. It's so flexible you can double it back upon itself using only about 12" of tubing--so, I'm wondering if it will resist collapsing from the weight of the soil above it when it is buried 5' underground!!!!!

Does anyone have any experience with this product in this application??

Thanks in advance for whatever advice you can offer!

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Old 08-08-2008, 12:05 PM   #8
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I don't think the Onix is Code approved for either the water supply or distribution piping. I would definitely make sure before installing it in one of those applications
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Old 08-08-2008, 12:20 PM   #9
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Quote:
Originally Posted by mstplumber View Post
I don't think the Onix is Code approved for either the water supply or distribution piping. I would definitely make sure before installing it in one of those applications
Thanks for that bit of advice, mstplumber! I'm going to call the company today to discuss the radiant heat system, will certainly ask about using it for supply lines, also.

BTW--check your inbox in a few minutes, I'm getting ready to PM you regarding a totally different issue .

Dugly

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