Copper to Pex

mackneerd

I want to go from 3/4” copper to 3/4 “ oxygen barrier pex on a hydronic gas heating system. I want to run the pex in a loop under a floor. I have existing copper line which has been previously cut off. It used to go to a radiator. What type of an adapter can I use to go from the 3/4“ copper to the 3/4 pex? Can I just sweat on a 3/4“ copper to pex fitting ? Or Is it possible to use the Sharkbite fitting ? Are there any special clamps that I should use or can I just use the pex crimped clamps?

pecmsg

Pex to copper adaptor!

Larry Weingarten

Hi, Something like this (as @pecmsg said): https://www.supplyhouse.com/Uponor-Wirsbo-LF4515050-1-2-ProPEX-x-1-2-Female-Sweat-Copper-Pipe-Adapter-Lead-Free-Brass?utm_source=bingad&utm_medium=shopping&msclkid=9ddc56456d051de42b083594208f4994 I wouldn't go with Sharkbite unless you mean it to be a temporary repair.

Yours, Larry

ethicalpaul

Sharkbite would eliminate the reduction of the inside diameter that a copper to pex adapter would create, if that matters. Has anyone seen a Sharkbite ever fail?

Big Ed_4

It will not work and those cut off risers need to be tied together . My thoughts are that you have a Monoflow system .. There is not enough flow to feed a radiant system. .

mackneerd

Any need for different clamps or can I just use the Pex clamps ?

vhauk

been using shark bite fittings since they first came out. I was very skeptical but I’ve never seen one fail. Copper to pex is a dream. 

hot_rod

Aside from what type of system you have, 3/4 Pex will not be easy to loop under a floor. Consider multiple loops of 1/2” manifolded together.