Bath pipe keeps coming away an water comes through kitchen ceiling

[Adda]

Hello 👋
Just looking for a bit of advice please. Bath waste pipe has a join that over time has come away and when it does water is going straight down the walls dripping form kitchen ceiling below.
Got a plumber to look few years back who put the pipe back together an said it shouldn’t happen again.
Well it did last week an now when I check the join, I can push it together and it will work but it’s not watertight and comes away no matter how much I tighten the ring bit.
would appreciate any advice. Is there anything to seal the join or do I need to get the pipe replaced?
I’ve added a couple of pics.
Many thanks guys 🙏
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sorry pics upside down for some reason on original post

 

[ShaunCorbs]

Is there a black rubber piece inside the compression end of the fitting eg where the pipe goes in if not you’ve lost it somehow / hasn’t been put on

if you haven’t

https://www.NoLinkingToThis/p/mcalpine-s23u-multifit-blanking-plug-white-32mm/73053

Then install / in this order

 

[Adda]

Nothing like that mate. Just the red bit. Don’t think it could have ever been there unless when it last broke its disappeared under the floor boards.
cheers for answering.
do I Just need to get a rubber seal then?
Thanks

 

[ShaunCorbs]

Nothing like that mate. Just the red bit. Don’t think it could have ever been there unless when it last broke its disappeared under the floor boards.
cheers for answering.
do I Just need to get a rubber seal then?
Thanks

yes and just re make the joint and tighten should be good then

 

[Adda]

yes and just re make the joint and tighten should be good then

Absolute legend mate! Thanks so much. Will do this an hopefully can trust it again. Might wrap some tape around the two pipes as well as for good luck as there must be some pressure nudging them apart over time.
cheers again mate for the advice👍👍👍

 

[ShaunCorbs]

Absolute legend mate! Thanks so much. Will do this an hopefully can trust it again. Might wrap some tape around the two pipes as well as for good luck as there must be some pressure nudging them apart over time.
cheers again mate for the advice👍👍👍

tbh I wouldn’t put tape on them but once made up try to pull them apart slightly shouldn’t come out

 

[Stigster]

I know you've not got the black rubber seal but there's a fair chance it's been pushed right to the back of the socket inside the fitting. You did say you've pushed the pipe into the fitting already and doing that with the nut in place almost always shoves the seal right to the back where it's hard to see.

Just in case you haven't looked right down into the outer rim of the fitting to see if it's down there. If it is fishing it out often damages it so you may need a new one to fit anyway as per Shaun's excellent advice.

 

[Adda]

tbh I wouldn’t put tape on them but once made up try to pull them apart slightly shouldn’t come out

Thanks again Shaun. Yeah, that makes sense really 😂. Shouldn’t be a need really for me to add to it if the joint is tight.
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I know you've not got the black rubber seal but there's a fair chance it's been pushed right to the back of the socket inside the fitting. You did say you've pushed the pipe into the fitting already and doing that with the nut in place almost always shoves the seal right to the back where it's hard to see.

Just in case you haven't looked right down into the outer rim of the fitting to see if it's down there. If it is fishing it out often damages it so you may need a new one to fit anyway as per Shaun's excellent advice.

Stig mate. That sounds plausible as this pipe has been in place years an surely the last plumber that looked would have noticed it missing. I couldn’t find it under the floorboards but I’m gonna take it apart again now. I’ll let you know an Cheers for the suggestion. I’ve been really impressed by the responses on here. Great lads . Thank you 🙏
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Okay 😂😂 look what I found
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Right. Dried everything off. Watched a great two minute vid on YouTube on how these things fit together. ( I didn’t realise Shauns photo explained. Thought it was just to show the parts).
Put the pipe back in, tightened it up and it feels tight and solid. So pleased. Thanks so much for helping me sort this. Shauns advice was excellent and Stigster, so glad you had that thought as it was spot on. Genius. Hope it helps anyone else that comes across this thread. Cheers lads. Take care