PEX-AL-PEX for hot water return (manifold system)

[elvis80]

(Bear with me this is my first post on here...)

We're putting in a manifold system for the H+C in the bathrooms of our new house (self-build). What are everyone's opinions on using PEX-AL-PEX pipe for our hot water return system, please? Good or bad idea? The pipe says: Tmax 95 degrees C / 10 bar / ISO 9001. There's another code, but the piece I have only has 070M, then it's cut. Do I need to check the rest of it?

It's hard to find my guidance online.

 

[ShaunCorbs]

Any chance of a pic of the pipe ?

 

[EvilDrPorkChop]

My understanding was that you couldn't use Plastic on a HW circulating return circuit and that draw offs had to be at least a meter in copper before going to plastic - however not sure on the type of pipe system you are using they may approve it.

 

[elvis80]

Thanks both. Here are some pics. It's Pipex pipe, but their website wasn't very helpful. It seems to be used for UFH a lot, but assuming that's not an indicator as that runs at lower temperatures?

 

[ShaunCorbs]

Yep your fine for using it for secondary returns it’s classed as mlcp

 

[elvis80]

Yep your fine for using it for secondary returns it’s classed as mlcp

Really! That's great. Thanks for your help. Much appreciated.

 

[Dave Marques]

Uponor MLCP is fine for secondary return. MLCP is Pex-AL-Pex but not all MLC systems are suitable, check with the manufacturer first.