PEX Female Adapters vs. Swivel Couplings

Saturday, December 1, 2007 - Matt Weiss
Question

I bought a Flair-It Fitting with a female end and a coupling end. When I tried to install a faucet with a1/2" MPT end I used teflon tape on the threads I could not get it to seal without leaking. Any Help?

Flair-It Team

This is another common question. When using 1/2 tubing, you can connect PEX and PB with no problem. Just tighten until you hear a squeak and then another 1/2 turn. When using 3/4 tubing, you have two options. When using a normal Flair-It 3/4 coupling, you will need to use a PB adaptor in the 3/4 PB since the wall thickness is thinner in PB than in pex. OR you can use the PEX to PB 3/4 coupler (6844)

1 comment (Add your own)

1. Bob Koretsky wrote:
I purchased a BestPEX Manifold 20 Port with 1/2" Crimp Valves, and at the bottom of the manifold, there are 2 3/4" Flair-it female fittings. I want to connect this manifold to a PEX system using a brass adapter that has a 3/4" MPT on one end, and a PEX crimp fitting on the other end. The above question and answer does not address exactly how tight or how far I should thread the brass adapter into the manifold female fittings to get no leaks.

January 23, 2008 @ 8:28 PM

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