This is a bit of a repeat of a thread I did a while back, it's taken me a
while to get in a position to actually do stuff.
I'm thinking of going ahead and getting a second washing machine which will
stand alongside the existing one. I can sort out the water supply by getting
a Y Piece (Screwfix) so that's not a problem. But I can't find the
equivalent for the drainage pipe. I can just about fit one pipe into my
existing stand so obviously two isn't going to go, is there something
available which can connect two drain pipes together into a third single
I don't intend to drain the two machines at the same time so the capacity
need not be greater.
I don't think you're going to find a single Y-shaped waste fitting,
which I suspect is what you're looking for; instead you'll need to
effectively make your own up using a T-shaped one plus two 90-degree
elbows (interconnected with short lengths of waste pipe).
I've done this for a washing machine and dishwasher, where getting another
waste pipe under the floor was going to be a real PITA. I used a normal w/m
trap and vertical pipe, cut the upstand close to the trap, and fitted a
swept tee into the vertical pipe, and an elbow to turn the result upwards.
Another vertical piece of pipe provides two inlets to one trap. The whole
thing takes up about 300mm width of wall with the various fittings.
We do not make any particular effort to ensure that both machines do not
pump simultaneously, and have not so far had any problems with overflowing.
This will depend on the particular flow rates of your machines, of course.
Make sure the vertical pipes are tall enough to give some immediate fall,
given that one is now fitted to an elbow above the trap.
Use plastic compression fittings, unless you are sure that the pipes
involved are glueable plastic, and the right size for solvent fittings.
Clip the upstands firmly, as the whole assembly will be a bit wobbly if you
Best of luck,
You'll be modifying the drain pipe, not the hoses - if you join the
hoses the waste from one machine will end up in the other one. So you'll
need to cut the existing pipe, push a push-fit tee on to it, replace the
bit you cut off, cut a stub of new pipe to fit the elbow to the tee, and
another new piece of pipe to take it up to the same level as the other
one, then fix the pipes to the walls with a couple of brackets each.
These are the sort of fittings you'll need:
if your washing machine is near your sink then why don't you get a cone
shaped adapter and connect it to your sink waste.
I have a washing machine connected to the waste on the quarter sink and a
dishwasher connected to the main sink,never had any probs.
It's designed to cut into an unsullied length of waste pipe, eg
(typically) the bit running between the trap on your kitchen sink and
where it goes through the outside wall. It comes apart, and the two
yokes are bolted around the waste pipe whereupon you use an provided
cutting tool to 'break into' the pipe, within the fitting. It's usually
an OK-ish solution, but is not really suitable in your case where you've
already got a stand pipe... far quicker/easier/neater/cheaper/more
efficient just to add a tee and an elbow as already described.
It just cuts into the waste pipe, and the top of the stand pipe could
then be sealed off with and end cap to prevent possible overflowing.
The attachements on the above kit can swivel in different places to
make installation easier.
I'm not sure I'd recommend plumbing two washing machines into a single
standpipe without seeing it. The bit about not /intending/ having both
machines drain at the same time caught my eye...
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