What do I need to connect these 2 pipes?

Rusty190

The slim, pipe, furthest away in photo, is the drainage outlet for my shower. It emerges from the wall on a downward slope and inside the white/grey connector thingy, is the pipe that the outside black pipe, needs to connect to. It seems to be just a push fit connection. For some reason, of late, the black pipe bit is becoming disconnected from the pipe inside the grey connector and shower water cascades over the deck. I've pushed them back together, as best able, a few times now but I'd like to fix this so it's not recurring. The inside pipe (not visible on photo) seems to need to be a bit longer, in my humble opinion, so that the connection is more robust. Something a bit flexible would be useful too as the black pipe changes direction fairly near to the wall. Any ideas please?

Many thanks.

Martin_the_Unjust

Have a search for ‘flexible waste pipe’ of the appropriate size

Rodders53

That is a 40mm waste compression fitting (used incorrectly). It should all have been solvent weld joints! All that's happened is the pipe has popped out of the loose joint. It needs refitting.

Undo the nut, slide onto pipe along with the rubber seal rings/washers … You may need new washers/o-rings from another compression fitting (or spare parts) and you could well have issues holding the pipe in the wall so that the nut can be tightened up enough (by hand)…

Random example of the type of compression fitting here. https://www.wickes.co.uk/FloPlast-WC08-White-Unicom-Compression-Waste-Straight-Coupler---40mm/p/431902 Other makes and suppliers exist.

You may loosen a join within the wall or under the shower (ideally you need to access to check) if not careful. A competent plumber should be able to do it all properly.

WIAWSNB

As rodders says - undo that grey (white) serrated collar, and examine the seals and washers inside. Put a photo on here too?

With the collar and bits removed, test the elbowed black pipe for size and fit, and see if it just needs tweaking - an extra inch or so added? If so, we can guide you on that.

Rusty190

No chance of me undoing that collar thing - it seems to have been mortared into place.

There are several joints along the short length of the black pipe and they are all solvent welded - just not that bit.

I'll have to pass it on to a plumber I think.

I the meantime, is there any sort of Heath Robinson temporary bit I can put in place?

Thank you.

Boohoo

If this needs to be done properly via a plumber it may cost a couple of hundred quid.

Who installed that in the 1st place.

?

grumpy_codger

https://forums.moneysavingexpert.com/discussion/comment/82007744#Comment_82007744

Some other plumber for £150 few years ago? Does this really matter? Do you really think that all plumbers do their jobs 'properly'?

grumpy_codger

https://forums.moneysavingexpert.com/discussion/comment/82007669#Comment_82007669

No chance of me undoing that collar thing - it seems to have been mortared into place.

It's not that hard to remove some mortar.

There are several joints along the short length of the black pipe and they are all solvent welded - just not that bit.

All or some can be easily replaced with push-fit giving more flexibility/adjustability

Boohoo

https://forums.moneysavingexpert.com/discussion/comment/82007778#Comment_82007778

No I don't but that goes for every trade, doctor's, dentist , beautician or whatever industry you employ to do work.

Moving on, as mentioned it should be a welded joint to stop it coming apart when the waste water is discharged into the pipe.

EssexExile

When you find a good plumber, doctor, dentist , beautician or whatever - keep hold of their details and don't ever let them even think of retiring.

bjorn_toby_wilde

It really doesn’t “need” to be solvent welded. Most waste pipes aren’t after all. They’re either push fit or compression.

That white fitting sticking out of the wall is a compression fitting. Can you turn the collar at all? It will probably need both hands. It doesn’t look like it’s mortared in, although the rest of the elbow is.

If you can undo the collar then behind it should be a rubber washer. Put the nut back over the end of the black pipe then stretch the washer over the black pipe too. The washer should be bevelled so make sure the narrow part of the bevel is facing towards the white fitting.

Push the black pipe into the white fitting as far as it will go then do the white collar up tight again. As tight as you can manage by hand.