pilgrim Posted December 1, 2022 Share Posted December 1, 2022 I am struggling to find the right key words to find the bit I need to connect my new soil stack to the existing vitreous clay soil pipe in the ground. I assume an adaptor would be best here to ensure a good seal. I have attached some photos of the existing pipe and a rough sketch for the new soil stack that I am planning to build. Any help on this would be much appreciated. Link to comment Share on other sites More sharing options...
Conor Posted December 1, 2022 Share Posted December 1, 2022 You need to dig down, cut off the socket / cement topand fit a rubber coupler like this. Surround in concrete. https://www.drainageonline.co.uk/underground-drainage/drainage-pipe-and-fittings/flexseal-couplings/clay-to-pvc-adaptor-couplings 1 Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted December 1, 2022 Share Posted December 1, 2022 +1 for everything aside from concrete. Building control do not permit concrete to touch drainage, it should be surrounded in 10mm pea gravel. My new drainage had to be shuttered so the concrete foundation came nowhere near it Link to comment Share on other sites More sharing options...
Conor Posted December 1, 2022 Share Posted December 1, 2022 3 minutes ago, MikeGrahamT21 said: +1 for everything aside from concrete. Building control do not permit concrete to touch drainage, it should be surrounded in 10mm pea gravel. My new drainage had to be shuttered so the concrete foundation came nowhere near it Opposite here. Anything with less than 300mm cover has to be encased. Also standard practice in the water industry for shallow cover pipes of all types. Other than concrete, @pilgrim, make sure the pipe above is well supported and protected from movement.Hence the suggestion of concrete. Link to comment Share on other sites More sharing options...
Mr Punter Posted December 1, 2022 Share Posted December 1, 2022 That looks like a trapped gulley. You will need to remove it and fit a long radius bend with rodding access. Link to comment Share on other sites More sharing options...
crispy_wafer Posted December 1, 2022 Share Posted December 1, 2022 (edited) Just looking at your diagram (I know it may differ from reality), but take care with the opposing waste connections. Edited December 1, 2022 by crispy_wafer 1 Link to comment Share on other sites More sharing options...
pilgrim Posted December 3, 2022 Author Share Posted December 3, 2022 Thank you for the links to documents and the advice @Conor @crispy_wafer. I will check with my building control guy whether he would like the new joint encased in concrete or not. I have to cut the concrete against the wall back and put in a french drain so I will also cut around the connection and see what I find when I dig down. 🤞 Link to comment Share on other sites More sharing options...
Nickfromwales Posted December 19, 2022 Share Posted December 19, 2022 On 01/12/2022 at 13:01, Mr Punter said: That looks like a trapped gulley. You will need to remove it and fit a long radius bend with rodding access. Lol. Glad you spotted the standing water in there. @pilgrim, did you see this? Link to comment Share on other sites More sharing options...
pilgrim Posted December 19, 2022 Author Share Posted December 19, 2022 @Nickfromwales @Mr Punter That standing water was actually caused by a blocked sewer, after I read these messages I lifted the man hole and the level was only a few inches below the cover. Ive had it unblocked now and the water is gone, it was just an elbow. Ive now started the process of installing the french drain and digging out the old pipes. 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted December 19, 2022 Share Posted December 19, 2022 11 minutes ago, pilgrim said: @Nickfromwales @Mr Punter That standing water was actually caused by a blocked sewer, after I read these messages I lifted the man hole and the level was only a few inches below the cover. Ive had it unblocked now and the water is gone, it was just an elbow. Ive now started the process of installing the french drain and digging out the old pipes. Happy days. Link to comment Share on other sites More sharing options...
pilgrim Posted January 4, 2023 Author Share Posted January 4, 2023 Back to the digging today, there was no concrete or shingle protecting the old soil pipe. Do you think it would be worth digging out all the way to the manhole/inspection chamber and replacing all the old pipework with some shingle? Also weirdly this hole is slowly filling with water, bottom left in picture, this level is above the level of the communal sewer and the water smells clean. There are no rivers or ponds nearby so im surprised to see the water seeping into the hole. Link to comment Share on other sites More sharing options...
ProDave Posted January 4, 2023 Share Posted January 4, 2023 Why are you wanting to replace all the old pipe? It looks okay to me? Link to comment Share on other sites More sharing options...
Radian Posted January 4, 2023 Share Posted January 4, 2023 6 minutes ago, pilgrim said: Also weirdly this hole is slowly filling with water, bottom left in picture, this level is above the level of the communal sewer and the water smells clean. There are no rivers or ponds nearby so im surprised to see the water seeping into the hole. The brickwork the rising from the foundation also looks wet. Is this a suspended floor? I'm wondering if there was a puddle in this corner that's now able to seep out. Link to comment Share on other sites More sharing options...
saveasteading Posted January 4, 2023 Share Posted January 4, 2023 8 minutes ago, pilgrim said: im surprised to see the water seeping into the hole. Unless Suffolk is different, the ground will be saturated and water will seep in from all around. It doesn't look a lot. I agree to leave that lovely old pipework in place, unless it looks damaged. Put shingle round and over it. Link to comment Share on other sites More sharing options...
pilgrim Posted January 4, 2023 Author Share Posted January 4, 2023 25 minutes ago, ProDave said: Why are you wanting to replace all the old pipe? It looks okay to me? The old bathroom waste had the toilet connected to the furthest pipe and the bath draining into the open drain, now putting in a new soil stack that I want to also connect the bath into, also putting in a downstairs toilet just a bit further out of the top of the shot, to all link up. So I was thinking of cutting the pipe just below the Y joint and using a coupler to join the plastic pipework, just wanted to make sure I wouldnt be causing any future problems with movement or different materials causing issues down the line. Plumbing is still new to me! 25 minutes ago, saveasteading said: Unless Suffolk is different, the ground will be saturated and water will seep in from all around. It doesn't look a lot. Hopefully it is just ground water, just seemed odd it only happened in this area, hopefully it wont be any fuller in the morning! Link to comment Share on other sites More sharing options...
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