3/4 PVC to 1/2 PEX please

[jjamison]

I purchased a SharkBite U058LFA Plumbing Fitting, 3/4 inch x 1/2 inch, Brass. It fits the 1/2 PEX just fine, but the 3/4 inch PVC does not fit. Confirm for me that PVC and CPVC have different OD? Such that if this fitting is suited for 3/4 CPVC it won't fint my 3/4 PVC because it sure seems to be too small. Any recommendations? Thank you!

 

[wwhitney]

Yes, there are two primary sizing schemes, Schedule 40 or IPS (iron pipe, PVC) and Copper Tube Size or CTS (CPVC, copper, PEX). So you need a Schedule 40 3/4" x CTS 1/2" coupling, but the part you linked to is a 3/4" CTS x 1/2" CTS coupling.

Sharkbite makes transition couplings for CTS to Schedule 40, https://www.sharkbite.com/products/pvc-transition-coupling but not reducing verisons. So as far as Sharkbites go you'd need to use two couplings and a short length of pipe in between (or else just use 3/4" PEX instead of 1/2" PEX). Not sure if another manufacturer has a single piece push to connect reducing CTS to Schedule 40 transition coupling.

Cheers, Wayne

 

[Sponsor]

 

[Reach4]

PEX and CPVC and common copper pipe are CTS, so one of those could be an intermediate stage.

https://www.supplyhouse.com/Sioux-Chief-645X23P-3-4-PVC-x-1-2-PEX-Crimp-Straight-Adapter-Lead-Free
https://www.pexuniverse.com/sioux-chief-1-2-pex-3-4-pvc-adapter-lead-free-645x23p
Sioux Chief 645X23Pcan make the transition the whole way.

You attach to the PVC with primer and PVC cement.