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Chris French

RJH Wrote in message:
On 10/05/2016 22:30, wrote:
I am told it is "not correct" for a washing machine waste pipe to exit directly behind a washing machine. Why is this?

If you've got the space, I can't think of a reason.

Are there any issues about the washing machine waste emptying via the sink trap. I am concerned about the rate of Water discharge.

I have my washing machine (and dishwasher) waste connected to the sink
waste. And it empties at quite a rate from a pump in the cellar. I think
it's just a matter of time before it pops the push fit pipework. So in
the course of time, I will install a dedicated washing machine waste.
Before it's too late. Or maybe just after - haven't decided yet.

Also, and I'd guess that this is because there's a fair amount of water
sitting in the 22mm/10m pipe between washes, it's quite smelly - so it'd
be an idea to to route the washing machine waste after the sink trap.

Don't think that is really a problem. Pipes from machines that go
into a stand pipe are open (or WM does), never noticed it being
smelly. Our DW is connected directly, via the trap under the
sunk. The connection is before the trap.
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Chris French