On 06/11/2018 09:32, Chris French wrote:

Hi folks.

Ok, downstairs toilet is a S trap pan cemented into a clay pipe
sticking out of the floor. Low level WC, not close coupled. A
measurement of the end of the pan trap is about 110 mm. So and
old size pan with a slightly larger size outlet than modern ones
it seems.

The pan has cracked on the exit part of the trap such that it
leaks, so it needs replacing.

My main concern is not breaking the clay pipe :-)

Any experience /suggestions on the best approach?

You will probably find you can wiggle the connector out of the floor
socket. If not you can cut it off with an angle grinder and then work on
the pipe stub in segments if needs be.

Options seem to be to use a new S trap pan and cement it in after
removing the old cement. Though presumably as the old pan outlet
is larger, if I could just remove the old pan outlet remains from
the cement it could fit the new one in and then seal around
it?

You will find very little choice of S type trap pans these days. So a P
type and appropriate WC connector will probably be easier.

(People like McAlpine do WC connectors in a massive range of types -
they can usually join just about any bog to any pipe!)

Or use a horizontal outlet pan and a suitable pan connector.
Either into the cement ring or down into the pipe, which would
seem a better idea.

You will probably find the new connector has a set of large rubber fins
on the end. I would lube them up with some silicone grease, and push
them down into the pipe itself, without worrying about trying to get a
seal on the socket. (You can fill the socket for aesthetic purposes
after if you want - binding some rope or cord round the pipe that can be
slid into the socket will prevent any caulking / mastic from going down
the pipe).


--
Cheers,

John.

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