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Author Topic: 1 inch copper tube instead of Pex al pex  (Read 5178 times)

heat550

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1 inch copper tube instead of Pex al pex
« on: September 12, 2017, 01:36:36 AM »

I was thinking I have a 50 foot run boiler to house and Im going to use insul seal . and I was looking at using 1 inch copper tubing (flexable copper in a roll )
instead of pex al pex . Has any one done it this way ? cost is twice as much . But it would lasting longer. any insite be great .

Heat550
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E Yoder

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Re: 1 inch copper tube instead of Pex al pex
« Reply #1 on: September 12, 2017, 03:53:56 AM »

Am I understanding you to say that you want to bury soft copper underground? The heat loss would be worse than PAP or regular Pex.
I've seen lots of pinholed copper tubing and brass fittings (on domestic lines tho), never in Pex tubing. Pex is very, very durable. All the delaminated Pex I've heard talked about was PAP.
Just my humble opinion.  :)
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shepherd boy

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Re: 1 inch copper tube instead of Pex al pex
« Reply #2 on: September 12, 2017, 04:34:46 AM »

  Had a guy that bought a stove from me bury soft copper. Was told by his plumber pex was no good. 6 months later was buying insulated pex. Heat loss bad even with insulseal.
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mlappin

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Re: 1 inch copper tube instead of Pex al pex
« Reply #3 on: September 12, 2017, 07:52:07 AM »

Thats why radiators were always copper, very good at transferring heat. While you get some heat loss from Pex, it doesn’t transfer heat anywhere near as efficiently as copper, while pex would suck for a heat exchanger or radiator, its very good in underground lines as it has an insulating value in itself.
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heat550

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Re: 1 inch copper tube instead of Pex al pex
« Reply #4 on: September 18, 2017, 03:24:23 AM »

Well if I use 1 inch copper tubing I can  put insulation around it the black stuff inside the insul seal . It be good for ever no worry of over heating either . and easy to put in insul seal . Im still waiting to hear why its a bad idea . besides heat coming off pipe . Insul seal
is R15 and then with the air space in the 4 inch pvc is be over R15  2 inchs of foam and 1 inch of air mite add R4 .  anymore thoughts before I buy the 1 inch copper tubing ?  :bag:

Heat550
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hondaracer2oo4

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Re: 1 inch copper tube instead of Pex al pex
« Reply #5 on: September 18, 2017, 05:38:36 AM »

Wait, why do you want to use copper vs logstor/rehau/thermopex?
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heat550

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Re: 1 inch copper tube instead of Pex al pex
« Reply #6 on: September 18, 2017, 12:56:42 PM »

Look at the details on heat the copper can Handel compared to pex Al pex . It's makes system last longer . And I need 10 GPM flow. Short run 50 feet only needs 2-60 foot coppper. rolls

Heat550
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mlappin

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Re: 1 inch copper tube instead of Pex al pex
« Reply #7 on: September 18, 2017, 02:57:47 PM »

My 1” Pex was 15 years old when I replaced it with Logstor, I used some of it in the shop and buried the rest to a hydrant.
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RSI

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Re: 1 inch copper tube instead of Pex al pex
« Reply #8 on: September 18, 2017, 03:32:24 PM »

Copper will probably work fine. If you get much particulate in the water it will wear out the copper much faster than pex.
I would use 1" pex-al-pex or 1-1/4" pex if I was doing it.
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hondaracer2oo4

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Re: 1 inch copper tube instead of Pex al pex
« Reply #9 on: September 18, 2017, 05:03:25 PM »

I missed why you want to use pex al pex or copper vs regular pex???
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RSI

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Re: 1 inch copper tube instead of Pex al pex
« Reply #10 on: September 18, 2017, 06:29:06 PM »

I think the reason may be to be a full 1" ID. That is why I mentioned 1-1/4" pex.

Pex-al-pex and copper wouldn't have the expansion issue to deal with that pex would but with the amount of space in the Insul-Seal, it probably wouldn't make any difference.
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E Yoder

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Re: 1 inch copper tube instead of Pex al pex
« Reply #11 on: September 18, 2017, 07:03:09 PM »

I've never seen Pex B fail unless it's in direct sunlight and that was the old milky clear stuff. . We've used it since about '96. Amazingly durable stuff. And 1 1/4" crimp fittings aren't as uncommon as they used to be.
You mentioned the heat it can handle- you won't be over 212 F in an open system and boiling water at zero pressure never hurt Pex.
But if you do copper I'd love to hear your results. Interesting.
« Last Edit: September 18, 2017, 07:16:01 PM by E Yoder »
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hondaracer2oo4

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Re: 1 inch copper tube instead of Pex al pex
« Reply #12 on: September 18, 2017, 08:58:21 PM »

If you want true 1 inch Id just got with logstor 1 inch. No need to reinvent the wheel.
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RSI

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Re: 1 inch copper tube instead of Pex al pex
« Reply #13 on: September 18, 2017, 09:24:18 PM »

If you want true 1 inch Id just got with logstor 1 inch. No need to reinvent the wheel.
It sounds like he already got Insulseal insulation. He is only looking for bare pipe to put in it. I don't know of anyone that sells bare 32mm pex.
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hondaracer2oo4

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Re: 1 inch copper tube instead of Pex al pex
« Reply #14 on: September 18, 2017, 09:28:08 PM »

I re read the posts and he doesn't say that he's already bought the insul seal. I am just confused why he's trying to re invent the wheel here.
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