Jointing compound on pushfit?

[DIYPaul]

Hi, I'm a novice when it comes to plumbing. I've used compression fittings in the past, and have applied jointing compound.

With push-fit copper fittings, do you still need to use jointing compound?

 

[Dannypipe]

I've never had a Hep joint blow off. It's quite a worry really as I hear it happens, but I genuinely trust them 100%. I seriously would trust a Hep joint over a compression joint.

When you go to burst pipes, it's always a compression joint that fails. I wonder if Hep fails with freezing as easily?

 

[Billy Bob Bob]

a compression joint with the correct insert(bearing in mind IF i use plastic its the grey poly pipe with aluminium inserts) can not come apart and i have never had one fail i would never trust push fit fittings

 

[dontknowitall]

I had a Speedfit joint to replace last year that had frozen then burst and was beyond repair.

 

[carpstu]

if he didnt know / wasnt sure what he was doing theirs nothing wrong to read the packets on the fittings in b n q or anywhere else for that matter enerybodys got to learn some time

 

[shorticus]

metal everytime but I'm oldschool as I've said before

 

[plumbster3456]

It may seem a simple question to some but how do you learn in life? I was always told during my 7 year apprenticeship 'IF YOU DONT KNOW THEN ASK' can you imagine how i would of felt if i got the response that you lot have given this new member to the forum, What makes you lot so special that you should make fun of a simple straight YES OR NO question? and to be totally honest, i have seen a couple of your previous answers to some more technical questions and you are not all SUPER PLUMBERS! it is a form of bullying, and bullys are weak! be warned, i will be scanning your every response in the future and as you slip up i will rip the living p@@s and see how you like it!

so solar people are only having a bit of a laugh with the answers but who are you to come out all high and mighty.
The question asked was a bit funny to some of the experienced members as to us it is a daft question maybe we should not take the p but i think you should take a look back at some of your own answers from previous threads as you seem to sometimes cause a question mark upon yourself.
I f you where talking about a previous post from me I could not care less if you thought i have answered a technical question not to your liking.
I no more then you anyway

 

[pcollins]

Actually I've attended a burst this week that was a soldered joint blowing off. I've never seen this before, was it likely to be duff soldering or just sheer bad luck?

 

[Avatar]

'I dont use soldered joints - I dont trust them . . . .'


See how stupid this claim is - the same applies to pushfit joints!

All fittings fail at some point or another, and often because they weren't fitted right. A JG fitting actually tightens, as water pressure increases within it, something which a compression joint cannot claim!

Plastic plumbing is the new way and it should be embraced as such. I have seen compression joints fail, and even soldered joints after so long - but i cant say i have seen a pushfit that has failed!

Besides when you are jointing under the floor, up against the wall and in the most difficult possition known to man, soldinging is impossible, compressions are highly unlikey to tighten properly - the only thing you can fit reliably IS speedfit!

 

[tackleburger]

Everytime I have attended a failed push fit of any description the installation has been at fault in some way. e.g no inserts, copper pipe not pushed home, copper pipe forced in damaging hep grip ring, copper pipe dented, o ring damaged etc etc. Once saw a copper pipe push in and out a hep fitting inexlplicably, although the fitting and the gripper were in tact? Different piece of pipe worked but replaced fitting anyway with a polypipe. Only ones I have never seen fail so far are polypipe grey, their grip rings are steel like the old Acorns which were good too.

Started using plastic more now. The fittings are good but I always immobilise the pipework by clipping well, as that gives you added assurance if it can't move it can't pop anyway.