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
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.