Foam Pipe Insulation

[velvetfoot]

I think I'm going to put foam pipe insulation on the 1.25" copper pipe manifolds. What thickness should I get? What size should I get? Would this do the trick? http://www.homedepot.com/p/Tubolit-...tion-96-Lineal-Feet-Carton-DGS11012/203357714 It's a half inch think and says it's for 1.5" piping but doesn't say anything about the actual inside diameter.

 

[velvetfoot]

Looking a little deeper, I think I want the 1-3/8". Still not sure of thickness. They have 1/2", 3/4", and 1".

 

[Bob Rohr]

Looking a little deeper, I think I want the 1-3/8". Still not sure of thickness. They have 1/2", 3/4", and 1".

1-3/8 is the OD of 1-1/4 copper. How hot will the manifolds get? Foam is a good choice above 180F continuous temperatures. Fiberglass will last forever if you keep it dry.

 

[velvetfoot]

Thanks. I think you meant "not a good choice above 180F". Based on my oil boiler, it (I think polyethele) got a little melty right right at the boiler and I put some fiberglass there. I used some other foam, the black stuff as on A/C lines, I think polyurethane but not sure, near the boiler as an experiment and it didn't melt. I'm thinking 1" thick polyethelne would be the most cost effective.

 

[velvetfoot]

I ordered some of this stuff:
http://www.ebay.com/itm/K-FLEX-USA-...722?pt=LH_DefaultDomain_0&hash=item3396065dca

K-Flex elastomeric by Nomaco, 1-3/8" ID, 1" wall thickness

 

[velvetfoot]

It arrived. ROI: 1000 years.