Push-fit fittings

[stevedo]

I'm changing the towel rail in an en-suite. The position of the central heating pipes needs to be changed. I've cut back the current pipes from under the floor and used push fit maintenance valves as a holding position until I get round to finishing the job. My question is, given that the system is sealed and pressurised to about 2.0 bar when hot, is it OK to leave these types of maintenance valves in place.

It's just that I'm having a few concerns and would rather avoid problems before I refit the floor and tile over.

Thanks
Steve

 

[Slugbabydotcom]

is it OK to leave these types of maintenance valves in place

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Generally yes it ok. They can cause a bit of a restriction in the pipe but no more than the rad valves so you should be ok
Some people on here dont like plastic fittings and pipe. I personally love em but I only use Hep20 as a rule.
If you have kids in the house it may be worth adding short lengths of pipe with stop ends for you to cut off and connect to later so they dont play with the valve and get covered in hot water, also stops debris getting into the fitting

 

[ChrisR]

DEpends on the valve. eg the Speedfit one withthe plastic screwed slotty bit is not suitable for CH.
Ordinary (37p variety) iso valves leak sometimes on ch if you leave them alone, and always if you turn them more than about once. The pushfit valves are probably a bit better than those.

All fittings can leak if not put together properly. Pushfits - of all makes - can leak even if the assembly has been textbook.
New style Speedfit (plus their multi O ring inserts if using plastic pipe) is probably the best at the moment. Hep middling.

 

[hjalfi]

I have some copper pushfit, which I've been using to do CH work. I've discovered that getting them to seat properly involves pushing *really* hard --- to such an extent that when the pipes run horizontally and I haven't been able to brace the pipes, I'm not certain they've taken properly. At least you don't have to worry about this with compression fittings.

 

[frenchie1]

ive just done a job at the mailbox, a big complex in brum consisting of 190 odd apartments, starting prices at £190 k where all the water connections are in copper pushfit, including mains water, unvented & all heating systems, all works carried out by a big building firm

 

[fitz1]

I think plastic pushfit are great. Theyll keep my buisiness going long after im gone.Kids today will have a doddle of a job swapping them .

 

[hjalfi]

...all the water connections are in copper pushfit...

Any suggestions on how to make sure that all the connections are solid? It's not entirely obvious sometimes.

 

[htgeng]

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Any suggestions on how to make sure that all the connections are solid? It's not entirely obvious sometimes.

pressure test it.

 

[ChrisR]

starting prices at £190 k

That'll be for a garage?

It's a good habit to undo what you can, as with Hep, Polypipe etc to look at the pipe to see it has gone past all the bits it should.

The copper one. if it's cuprofit, is no better and often less good than some of the others.