wrote in message ...
On 5 Aug,
Frank Erskine wrote:

On 5 Aug 2005 03:01:11 -0700, "urchaidh" wrote:

I want to plumb a washing machine and (probably) a dishwasher into a
waste outlet that will have no sink.

I've always had a P-trap and standpipe option but was wondering about
these appliance adapter things - they look neater somehow. However, as
there's no sink at the top I'd just need a wee one way valve to break
vaccuum. All the appliance adapters I've seen come with the sink
connector at the top - can anyone point me at one that would suit my
needs.

Or should I just stick with the standpipe?

Do you actually NEED a standpipe? I'm toying with the idea of using a
length of 22mm "overflow" pipe through the wall, with a 90 deg elbow
on the inside, and a short length of 22mm to which to attach the
outlet hose from the washing machine (using a Jubilee clip). Outside,
the pipe will be attached to a further elbow and a feed to the drain
gulley.
Since there's a non-return valve in the washing machine there
shouldn't be any problem with smells from the gulley.

I was warned against using overfow pipe for this purpose, the push fit
connectors may blow off. Extending the pipe also increases emptying time.

Don't you need an air break in order to prevent syphonage from the
machine?

A spring loaded check valve will stop that. There are solvent welded 3/4
overflow pipes.

Extending emptying time is no great thing.