Can you use "Brush on Blue Block" with PEX pipe?

[Alecstar]

I am going to replace some of those cheap push pull plastic valves with Brass Craft 1/4 turn valves. The Brass Craft has a ribbed section that goes into the PEX pipe and it then clamped with a PEX ring. I'm sure you all know that much but what I was wondering, as this is my first foray into the world of PEX, is should I coat the Brass Craft valve with Blue Bock (or whatever) as extra insurance against leaks? Thank you.

 

[Weekend Handyman]

I am not a pro.

Are you asking if you should put pipe dope on a barbed PEX fitting before crimp it?

If so, definitely not.

If you are going to do your own plumbing, you need to homework and follow the manufacturer's instructions. Making stuff up will get you in trouble.

 

[Sponsor]

 

[Alecstar]

It's not a barbed. The PEX pipe just slips over the valve and gets crimped.

 

[Weekend Handyman]

It's not a barbed. The PEX pipe just slips over the valve and gets crimped.

F1807 fittings are what I am referring to.

Regardless, I have never heard of any kind of PEX fitting that requires pipe dope. I think you would increase your likelihood of leaks.

Here is the guide Sharkbite puts out: https://www.sharkbite.com/sites/default/files/files/sharkbite-pex-install-guide-2021-02.pdf

 

[Alecstar]

I know it doesn't "require" pipe dope... I was just wondering if it would provide extra insurance against leaks and if it was a good idea or not. It sounds like its not a good idea. Thanks for the response and the link.

 

[Terry]

I've never heard of anyone recommending pipe dope for PEX.