I am renovating a bathroom and today I made an attempt to remove the WC pan to prepare the wall for plastering. after unwrapping a greased rag around the joint I discovered that the collar of the cast iron soil pipe is broken. one side of it has broken off and was held in place by that rag.
now I am quite puzzled what to do. the push-fit connector that I bought in a shop is AFAIK for 110mm PVC waste pipes. it is certainly too small for that collar. the outside diameter of the pipe is around 101mm (including paint) and currently I have no way of measuring the internal diameter because I don't want the family to be left without a toiled for too long. if I start dismantling the joint completely, it will start leaking badly and I don't have anything fix the joint just yet.
I looked at the soil pipe from the outside of the house and I think I can see '3 1/2"' written on it, although it is a bit difficult since it is covered in many layers of paint. I certainly don't see '4"' there.
AFAIU, the only way I can go now is to remove the remainder of the collar, find a suitable push-fit connector and use it to connect the pan. unfortunately, after some googling I could not find any suitable for 3.5" cast iron soil pipes, all seem to be designed for 4".
I need to temporarily remove the existing old WC pan, plaster the wall, put it back and when the floor/walls are ready, I can finally fit the new pan. I might need to offset the new pan to the right a little bit as well.
AFAICS, this soil pipe cannot be 4", since it's outside diameter should be a bit larger (~110mm?).
I would be very thankful for any input, preferably with links/stock numbers, since I am a bit new to plumbing, especially to UK plumbing. 8) sorry if I am not using proper British terms for things. are these collars on cast iron pipes still used when connecting WC pans?
thanks very much in advance.