Weep on external soil pipe coupler

[mcprinter]

Roofer changed my soil pipe when doing the gutters some years ago.
He chopped the existing pipe a few inches above ground and joined to the new pipe with a coupler.
It leaks from the bottom of the coupler.
He siliconed around the top joint. Nothing around the bottom.

Having a new drive and side path (where the pipe is) installed in the next few weeks so want to fix.

Anything I can reliably seal it with?

If not, is it possible to fit a longer lower pipe, cut the upper pipe a little shorter and fit a new coupling without moving the soil pipe or 'ground fitting'.
Are the couplers 'slip' or fixed? Done a fair bit with waste but never soil.

Or any better solutions?

Thanks

 

[CBW]

Or any better solutions?

Yes, replace the joint. It’s likely a slip coupling, but try gently tapping up or down, as it might not be in correct position.

 

[mcprinter]

Yes, replace the joint. It’s likely a slip coupling, but try gently tapping up or down, as it might not be in correct position.

Thanks Chris
Hadn't thought of trying to move it. Makes sense.
Will have a look in the morning.

I am guessing I won't be able to just change the joint without either cutting the pipe or loosening wall clips and pipes going into it?
Not keen on messing with the pipes joining the stack.

 

[CBW]

I am guessing I won't be able to just change the joint without either cutting the pipe or loosening wall clips and pipes going into it?

If it’s a slip coupling, you might have enough wiggle room, but maybe loosen/remove just the clip above.

 

[mcprinter]

Couldn't get the existing coupling to move. See pics!

Wickes don't sell pipe it seems. Not on website and I didn't go searching in store.
Chopped a length of pipe from a 1M female socket
Coupler with the stops knocked out. Doesn't slip very easily. Tried silicon spray and fairy.

Multi-tooled above the existing coupler
Cut the new pipe about 1" short of the old pipe
Cleaned and chamfered the cut pipes
Tapped the coupler into place. No more leaks.

Thought I had something growing inside the soil pipe.
Turned out to be masses of sealant the roofer used to secure the sink/shower boss. Cleaned that up and hosed the debris our it had caught. Sink had been a little slow to drain recently.

 

[HERTS P&D]

Looks like you have done a better job than the roofer.

Andy

 

[mcprinter]

Looks like you have done a better job than the roofer.

Andy

Have struggled to find roofers that can 'roof' reliably.

Really nice guy and his son. Obviously not a plumber/drainage guy. Or a gutter man.
Slates he replaced haven't fallen off. Probably stuck on with silicone