How far down do I tighten Flair-It Pex Fitting nuts?

Saturday, December 1, 2007 - Brit
Question

How far down do I tighten Flair-It fitting nuts?

Flair-It Team

Tighten them down until they squeak. With Polybutylene Pipe there should be about 2 threads showing with PEX pipe 2-3.  

2 comments (Add your own)

1. Bob Koretsky wrote:
I purchased a BestPEX Manifold 20 Port with 1/2" Crimp Valves, and the crimp valves are not installed on the manifold body. The above question and answer does not help me to determine how far I should tighten each of the valves( which has a Flair-it fitting on one end) onto the manifold. I'm assuming that the manifold components are made of Polybutylene, but when I tighten them onto the manifold body within 2 threads, they don't squeak. It might be helpful to have some sort of more technical description which defines how many of the threads need to be engaged on the plastic side of the valve, not on the brass side. The pipe thread on the plastic side looks like a tapered pipe thread. It's funny that when I was working with galvanized iron, I could not find a rule-of-thumb description of how far to tighten the iron fittings onto pipe. I settled on approximately 1/2" of thread engagement.

January 23, 2008 @ 8:20 PM

2. robert knight wrote:
Confused. Have 1/2 O/D inside 3/8 I/D polybutylene pipe. Need to repair. Do I buy 1/2 flair-it fittings or 3/8.

July 20, 2008 @ 10:21 AM

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