Fitting new toilet to old earthenware (clay) pipe

[r00fi]

Plumbing experts - advice needed

I have a new p-trap toilet with a 100mm outlet

The old toilet outlet is approx 115mm and is plumped into an iron pipe with a large (for want of a better description) "collar" at the join. I'm guessing it's all been there since the house was built in the 40's.

I'd like to prep the area before getting a plumber in. The new toilet will need to be a little higher and I'll need to do some plaster patching and painting before the new loo goes in.

I'd like to take the old toilet out temporarily, but I don't know how its sealed in the old pipe. I'd hate to take it out and not be able to get it back in. (I guess I could use a bucket in the meantime ???)

Also how will the plumber fit the new toilet to the old pipe? They have different diameters and I think the large collar at the end of the iron pipe will need to be removed due to the different set back of the cistern.

Any suggestions as to what to use under the new toilet to raise it to the existing pipe? My guess is cement sheet or mortar...

(PS: Originally this thread said earthenware pipe, but further inspection with a magnet, indicates an iron or steel pipe)

[Tools]

Mortar is the go to raise your crapper. The plumber will either use mortar to seal in to the existing collar if it survives, or use a pvc pan collar and plumb quick (rubber) after cutting the collar off.Or may even run new PVC through the wall at the right height and join in to the earthenware outside.That would be the neatest way.

Tools

[juan]

I suspect you will find it is fixed to the cast iron collar with mortar. I just removed one and also a section of the cast iron pipe. The cast iron to cast iron was lead filled joints and I had to use heaps of heat to melt it before I could remove the unwanted section.
Get a plumber in to have a look and advise you on how to proceed.

Cheers

[wonderplumb]

Sand and cement bed under the new toilet, provided the floor level isnt going to be raised above the original height. For a pan into a cast iron pan collar you will more than likely find it will have putty sealing it.