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Old 01-09-2015, 02:48 PM   #1
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ACR tubes insolation


I want to insert a 3/4" copper tube for cold air and 3/8" cooper tube for hot air into a 3" PVC pipe underground. I need to insulate the 3/4" copper tube (cold air). Vendor offer FOAM (R-value=2.4) and RUBBER (R-value=3) for insulation.

I read another web-side that I should not put FOAM near heat.

Since I want to run both copper tubes inside the same PVC pipe. I would like to make sure I can use FOAM as insulation in this particular case.
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Old 01-09-2015, 02:59 PM   #2
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How hot is the hot?

Why do you want to use copper?

There are premade units out of PEX that are insulated already.
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Old 01-09-2015, 04:02 PM   #3
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Letting us in on what it is your really trying to do in totality and not making it a secret makes it a lot easier to make suggestions.
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Old 01-13-2015, 10:44 AM   #4
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Copper tubes insulation for Air Conditioner System


I want to insert a 3/4" copper tubes for cold air and 3/8" copper tubes for hot air into a 3" PVC pipe underground.
I nedd to insulate the 3/4"copper tube (cold air). Vendor offer FOAM (R-value=2.4) and RUBBER (R-value=3) for insulation.

I read in another web-site that I should not put FOAM near heat.

Since I want to run both copper tubes inside the same PVC pipe. I would like to make sur I can use FOAM as insulation in this particular case.
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Old 01-14-2015, 04:10 AM   #5
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If its just for A/C, the liquid line(small line) should never get above 135F. So if your foam insulation is okay to use on a water heaters pipes, then it will be okay for your A/C use.
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