Push fit connectors

bandejapaisa · 16 Jun 2014

I'm using push fit connectors for the first time. I was unscrewing it first, putting the plastic pipe in, and then screwing it up.

However, I've seen some videos where it looks like the pipe is just being pushed right in without unscrewing it first. Is this a different sort of connector or do I not need to unscrew it first?

rjm2k · 16 Jun 2014

Lots of different types and you don't say which you have. Just follow the instructions on the pack.

bandejapaisa · 16 Jun 2014

Well there weren't any instructions actually. It's one of these:

http://www.toolstation.com/shop/Plumbing/Pushfit/Tee+15mmn/d20/sd3143/p47121

stardanny · 16 Jun 2014

Yep, it is a push fit. No need to unscrew it. Make sure plastic pipe has liner in it. Copper pipe does not need liner.

Daniel.

bandejapaisa · 16 Jun 2014

Liner...? Do you mean the inserts I was putting in the end of the pipes for support?

stardanny · 16 Jun 2014

Yes. Liner or inserts, same thing

Daniel.

SandyLyon · 16 Jun 2014

They look to be "O" ring first grab ring second, you really need to make sure you insert the pipe fully by marking the depth on the pipe.
With this type of configuration if you don't fully insert the pipe it may pass through the "O" ring and just catch on the grab ring. When pressure builds up it could blow out and cause a full bore leak, that's why most of the leading brands have gone for Grab first "O" ring second.
You should never unscrew them to assemble as you could end up with the grab ring too far up the pipe and the cap won't seat correctly

bandejapaisa · 16 Jun 2014

SandyLyon said:
They look to be "O" ring first grab ring second, you really need to make sure you insert the pipe fully by marking the depth on the pipe.
With this type of configuration if you don't fully insert the pipe it may pass through the "O" ring and just catch on the grab ring. When pressure builds up it could blow out and cause a full bore leak, that's why most of the leading brands have gone for Grab first "O" ring second.
You should never unscrew them to assemble as you could end up with the grab ring too far up the pipe and the cap won't seat correctly

Yes, the O ring is first, then it's a metal grab ring which really gets it's hooks in. Can you point me to any links to 'grab ring first' connectors?

So I assume I would only unscrew it if I needed to remove it, and does that then make it useless and I should replace it? If I unscrew it, the grab ring is seated, so all I can do is either screw it back together or pull of the grab ring which probably will compromise it.

SandyLyon · 16 Jun 2014

bandejapaisa said:
SandyLyon said:

They look to be "O" ring first grab ring second, you really need to make sure you insert the pipe fully by marking the depth on the pipe.
With this type of configuration if you don't fully insert the pipe it may pass through the "O" ring and just catch on the grab ring. When pressure builds up it could blow out and cause a full bore leak, that's why most of the leading brands have gone for Grab first "O" ring second.
You should never unscrew them to assemble as you could end up with the grab ring too far up the pipe and the cap won't seat correctly

Click to expand...

Yes, the O ring is first, then it's a metal grab ring which really gets it's hooks in. Can you point me to any links to 'grab ring first' connectors?

So I assume I would only unscrew it if I needed to remove it, and does that then make it useless and I should replace it? If I unscrew it, the grab ring is seated, so all I can do is either screw it back together or pull of the grab ring which probably will compromise it.

If installed correctly then this fitting is ok, you can take them apart once fitted but generally you can't get the grab ring off without damaging the ring and pipe, so to re-use you would need to replace the grab ring (if you can get them) or throw the fitting away and buy another.

We all have our own preferences when it comes to Pushfit, I only use Hep2o but other Grip first fittings include Speedfit and Polyfit (the white one)

ALCPlumbing · 16 Jun 2014

Just mark the pipe each and every time so you know you have pushed it in fully and I always give it a good tug to satisfy myself that it will hold. It's more time consuming but definitely best working practice.

doitall · 16 Jun 2014

Avoid that type if you can, as the grab ring is in water and can give problems.

The better makes the O ring seals the pipe first so the grab ring is dry

pallen5000 · 17 Jun 2014

ALCPlumbing said:
I always give it a good tug to satisfy myself

Sorry, couldnt resist

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Push fit connectors

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