What do I need to connect these 2 pipes?

Eldi_Dos

It would be worthwhile getting a suitable sized flexible brush and giving both pipes a clean out before reconnecting, in case there is a build up of hair and crud from the shower.

Rusty190

https://forums.moneysavingexpert.com/discussion/comment/82007838#Comment_82007838

I did try turning the nut the first time it happened but it wouldn't budge. We have very hard water round here so I expect it's been welded tight with limescale. I'm concerned about making it worse and dislodging the inner pipe further up the run. It's a large, low threshold shower so all pipework is under the floorboards with the shower tray on top of that. The pipe looks very clean. No gunk - I am a woman with standards!!

It was fitted by a plumber, originally.

GDB2222

You see that cable running across the wall. Push the pipe back into the fitting. Then get some string tie it to the cable and use it to support the pipe so it doesn’t pull out again. Bodge done! Better still, drill a couple of screws in to attach the string to.

Rusty190

I should also have mentioned, neither the inner or the outer pipe are connected to anything in that nut.

WIAWSNB

https://forums.moneysavingexpert.com/discussion/comment/82008049#Comment_82008049

Any chance of a close-up photo?

You are saying that the black pipe can be pushed in ok, but it not being held so gradually comes back out?

This is typically what should be inside these fittings:

The black pipe should slip over the inner pipe you see in the main LH part of the fitting. The tapered rubber seal fits over the black pipe. When the outer collar is tightened, it squishes the rubber seal, so that it tightens on the black pipe, seals it and holds it in place.

So, when you look inside that open fitting end, what can you see of the above?

In theory, if you cannot undo the collar, then you will struggle to push a pipe in the end - you'd have to force it over the inner pipe, and under the compressed rubber seal - that's a toughie. The pipe would normally go in by around an inch to 1.5", but it will barely go in at all if the rubber seal is in the way. So, tomorrow, could you take a pic looking into the fitting end, and also measure how far you can push the black pipe in.

Possibly the rubber seal is absent? In which case the pipe may well push right inside easily, tho' it won't be secure. But in this case, a good clean and a smear of adhesive should hold it - Stixall, Evostik, summat like that.

And that is what they call a bodge. I luv 'em. 😉

Boohoo

Rusty you could get the pipe connected and use a waste pipe clip to fix the pipe to the wall to stop it blowing off again.

I saw this and thought it may do for you as it looks like the waste pipe is bit away from the wall.

https://ebay.us/m/SUPDqU

bjorn_toby_wilde

https://forums.moneysavingexpert.com/discussion/comment/82008049#Comment_82008049

OP - they do normally need to be undone or you won’t be able to get the rubber seal ring back over the pipe. It will be tight but hopefully, given it’s mortared in, you shouldn’t disturb anything further up the chain.

The rubber seal will be inside the fitting. Personally I wouldn’t glue it in with anything. That’s a bodge too far 😉

What do you mean by “the inner pipe” not being connected to the nut? It should be if the plumber used compression fittings inside then completed the run outside with UV resistant solvent weld. I suspect he did it that way because the solvent weld is better outside as it doesn’t break down in sunlight and making that elbow removable gives you access if the pipe blocks up.

bjorn_toby_wilde

https://forums.moneysavingexpert.com/discussion/comment/82008048#Comment_82008048

Or just use the drill to fit a pipe clip.

WIAWSNB

A pic from the inside, where that pipe disappears through the wall, would be useful too.

If it's accessible - above floor level, and not boxed in?

bjorn_toby_wilde

https://forums.moneysavingexpert.com/discussion/comment/82008168#Comment_82008168

I think the OP said it’s under the floor beneath the shower.