"Steve Loft" wrote in message
...
BigWallop wrote:

Are you sure that the soil stack is only 90 mm (3.5'') in diameter Steve, as
anything less than 110 mm (4'') is not allowed for solid waste soil pipes.
Have
you changed the use of the room into a bathroom ? Or was the room changed
around before you moved in to the house ?

The soil stack has 3 1/2" stamped on it. As far as I know, it's always
been the bathroom. The stack is abut 50 years old.

Does the original WC connect to the pipe with a normal pan connector or is
it a
bodge of different sizes of pipe ?


It looks like a normal pan connector.

Steve Loft


The stack above the branch for the WC might only be used as a vent, so check
that the branch and the spigot into the house isn't 110 mm (4'') before you go
buying the wrong sizes. It is common for this type of arrangement to be used is
nothing else is being connected above a ground floor loo. Does the stack also
take rain water from the roof ?

If it looks like a normal WC connector then the branch must be 110 mm (4'') or
nothing else of the modern type would fit it. If so, then you should be able to
fit two 90 degree elbow connectors into the system. The 90 degree elbows aren't
that wide on the spigot end and should take up only 100 mm or there abouts.


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