"Tony" wrote in
:

I don't have a problem with using this size of waste pipe if necessary
but it does seem a bit large. Do I need to use it or is there any way
(perhaps by use of an anti-syphon trap) in which I can reduce the size
needed?

HepVO - Excellent. Search archives and/or Hepworth's website. (Their
flexible waste pipe also works very well.)

--
Rod