Lee Blaver wrote in message ...
Gavin Gillespie wrote:


Washing machine outlet hoses should not go into a sink syphon, but
into a 1.5" standpipe, as per most instruction books. There are
several good reasons for this, including to prevent waste water/grease
from the sink, flowing back into the machine, also any restrictions in
the pipe, i.e. the joint where it attaches to the syphon, provides the
perfect place for a loose button/any build up of fluff etc. to block
the hose, and cause problems later on.
If a connector with a non return valve is used, this is worse than
ever, as it will block 10 times as quick.

If you must use a washing machine without a proper filter than I suppose
you're right
The non return valve on the end of our machine's 2.5m waste hose has not
blocked in the 3 years it has been there...

Lee

indeed mines been installed for about 4 years - and not a blockage in
sight. In fact we just changed our washing machine last week and I
took the opportunity to check the non-return valve, and it was a clean
as the I installed it