Plumbing help. Plastic pipe and compression fittings

[Simon]

Hi.

I've had a nightmare just now. I have replumbed my bath with 22mm speedfit pipe and compression fittings.

I have turned the water on and most of fittings are leaking where I used plastic. The copper fittings are fine and so are the speedfits in the system.

I did the fittings up pretty tight but was slightly wary of breaking the inserts.

So what have I done wrong ? Even though they were all tight some would spin and some came off with a yank. On inspection the olives have bitten in to the plastic a bit. The olives are brass rather than copper.

PTFE time ? or just tighten them up even more ?

 

[Simon]

Thanks.

Plastic is cut square and using the standard inserts without o ring as recommended. Pipe is 22mm speed fit. I have 2 90 deg elbows for the bath tap manifold and also the manifold 22mm to 1/2 inch fitting all having plastic pipes.

The T pieces off the old bath circuit ( now feeding sink are a mix of copper and plastic).

Looks like brass olives and maybe some JetBlue sealant are my friend ?

 

[Simon]

Yeh they came with the fittings I was careful to avoid over tightening so hopefully I can just swap brass for copper ? Is ptfe worth adding?

No water in my house fail

 

[Simon]

Thanks for the help, I lifted the tank stop cocks and turned on the mains only to at least have some water.

I am using copper compressions to speedfit, mainly for the smaller size and what I thought, more robust fitting as they will be difficult to get to.

Will be off to get some copper olives and jointing compound later.

 

[Simon]

Before, due to installign marmox boards I would have to tweak the piping and also its only 15mm at moment. 22mm runs to where bath was.

I replumbed with 22mm and chased into wall. I used compression thinking they were more robust - and benefit from being more compact

 

[Simon]

Yeah the airing cupboard is at top of the pic and boiler is underneath, also the piping to a radiator goes that way too.

How I left it last night:

 

[Simon]

I can see that now, lets see how copper olives go. I still need to fit into the tap manifold with some sort of fitting as I don't really want the speed fittings in the wall.

I though having plastic pipes does away with the need for earth bonding? The metal taps etc are now isolated from earth.

I guess if it all goes wrong I can go for speed fits and new pipe - the current stuff will be affected by the olive, although i guess it does go deeper into the speed fits than the compressions.

I honestly thought compressions would be better, easier to fit and more durable

 

[Simon]

Ah the straight under the floor? That's connected to plastic again (after a 90deg bend just out of shot.

 

[Simon]

Yeah can see that now but read a few people recommending it

 

[Simon]

Speedfits are too bulky for the room I had. Especially between the joint and wall for the 90 def fittings.

Got new copper olives and some boss white to help lube things up. Made a massive difference to how it felt tightening up and it's now water tight.

Thanks for all the help. Very pleased

 

[Simon]

Doh. I just asked in local plumbers and that all they seemed to offer. They felt much better to tighten up with less friction on the threads/olive

I don't plan on drinking water from bathroom and shower is on mains so should be ok ?