soil pipe bend through wall

[sm_jamieson]

Need to get soil pipe from pan (close-coupled) to wall (distance 12"), through 9" wall, tight-ish 90 degree bend (replacing lead section), then into cast iron socket. Got iron socket adapter, pan connector and length of 110mm pipe OK. But the bend is an issue. Plumbers merchant said the only plastic bend they had was 90 degree with a socket each end. But using that, to get the radius close enough to the wall I would have to bury the plastic socket of the bend inside the wall. I was expecting him to offer me a length of pipe with a 90 degree bend moulded on the end to go round in one piece. Looking at the neighbour, they appear to have something like that (unless a joint is inside the wall, which I cannot believe). This is a very common situation. What is the usual way of doing it ? Simon.

[Bookworm]

PVC Bends are 92.5 degrees angle and usually single 'O' ring socket. Your Plumbers Merchant probably only had a Terrain in stock (double Socket Solvent Weld).

You should be able to do with:

Cast Iron adaptor in Cast Iron Soil stack socket. Caulk some string or something at the bottom of the joint and then make up with Plumbers Mate)

92.5 degree bend, (spigot in CI adaptor). (Use some Fairy Liquid to make easy push fit)

Long straight Pan Connector cut to length through the wall. ( or length of pipe with a Multi Qwik Pan Connector.

Go to a different Merchant.

[Jim Alexander]

maybe they were being obtuse and thought you were asking for 90deg and not

92.5deg?

First point, I would suggest sleeving the wall penetration with 150mm pipe, then you have lots of options without worrying about hidden leaks. Don't know if what you want can be done without some sort of hidden joint, either pre-fabricated solvent weld or ring seal. You have to ensure that you have sufficient free movement to get the parts to fit, particularly the section to the CI socket and one way I know works is to fit the ring seal of a spigot bend to the pipe from the wc. Yes its hidden which is one reason I sleeved it. Alternatively pre-fab a solvent weld bend if you are confident you can fit the piece to the CI socket.

Jim A

[sm_jamieson]

Um, I seem to have entered a parallel universe. What is significant about 92.5 ?

What do I have to caulk anything ?. The cast iron adapter he gave me has fins on one end and a plastic socket on the other.

I was querying the joint between the pipe through the wall and the bend. The problem is the joint would have to be part way through the wall. Should I be using something solvent weld instead of the o-ring push-fit ?

Simon.

Simon.

[sm_jamieson]

I've never seen a soil pipe through a wall with a sleeving around it before. They are always just cemented in. Surely my situation is common enough not to need special bits made up ?

Cheers, Simon.

[sm_jamieson]

Oh, I see, it you are going from vertical to horizontal with the bend,

2.5 degrees fall. But I'm trying to turn "left", in the horizontal plane, and I want 90 exactly ! Simon.

[Jim Alexander]

Fraid the world has moved on to internal stacks, but you are wanting to retrofit externally. You can easily fabricate with solvent weld what you want if that's how you want to do it. That's why there is no demand for a ready made part. That said Marley SB47 if you can get it would give you a

90deg bend. Still have the hidden joint issue to deal with though. Don't knock sleeving just cos you haven't seen it before, ask in a NG you get advice.

Jim A

[sm_jamieson]

I'd be fine with having a solvent weld inside the wall, and the diameter of the join would be less than push-fit, so I suppose I'll do that. Yep, thanks for the advice, all is welcome ! Simon.

[<me9]

It's moved on again, External stacks are again the norm, except for high rise premises.

[John Rumm]

I ended up having to bury a section of the elbow connector in the wall to get the bend close enough to the wall to allow the other end to mate with the soil pipe. I remember thinking at the time this must be a very comon situation.