Replacing downstairs bog - soil pipe problems
Jon, the drain collar was originally intended for an S trap pan complying with
the old BS, with a separate cistern and a flush pipe. Might even have been with
a high level cistern. Replacement with a close coupled suite is problematic, as
you've found. You can still get S trap pans (Twyford Classic for instance). It
would save you needing to cut off the collar.
Peter
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