I've just disconnect my washing machine ready for a new delivery on Wednesday.
Now I've discovered a potential problem The drain from the kitchen half-sink enters the down pipe (left) directly opposite the WM drain (right) and with the WM disconnected water is running out onto the floor when the half-sink is emptied. I've re-connected the WM for now to stop this happening.
It seems that every time we've emptied the half-sink, water has potentially been going into the back of the washing machine. Is this a problem and if so what is the fix?
Ta.
I think there is usually a rubbery flap thing (a very basic one way valve) in the dishwasher side to prevent exactly that.
There's no valve at the end I disconnected. Do you reckon there's one at the machine end? BTW it's washing machine not a dishwasher (if that makes a difference)
If it's only a 'half' sink...would the water pressure from emptying it be enough to drive the water into the washer drain? Looks like the water would have to go 'up hill' a bit to reach the flexi-hose in the pic...?
Try it..fill the sink up and disconect the washer hose, then drain the sink....does it spew water out?
Thanks mattyfez.
I've just tested it and even with hose angled up as much as I can, water is still coming down it. With the hose off it spews out, with the hose connected it trickles.
As Mattyfez says it looks like there would need to be enough pressure to force the water a fair distance uphill. More likely it’s entering the plastic coupling / lower part of hose then draining back. Can you disconnect the hose at the washer end then test it?
Instructions here...
PS it looks like it's been tightened with water-pump pliers; hand tight should be fine
As above stewmur, yes I've confirmed it's coming down the hose.
You can get a non return valve that could be installed on the washing machine line to stop the flow.
Instructions here…
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Right - so I need to get the hose looped higher than the top of the half-sink. That makes sense.
I've just checked my configuration out of curiosity...it appears to be similar to yours other than the addition of a gray plasic clip thing that keeps the washer drain hose looped up... maybe something like that would work/fit in your space?
Matty, please get a blanking cap on that isolation valve. They aren't meant to be left disconnected like that 😉
Matty, please get a blanking cap on that isolation valve. They aren’t meant to be left disconnected like that
I'd just noticed that myself, hahaha, yes sounds like a good idea, although it's probably been like that since the days of washing machines needing a hot water feed!
Something like this? https://www.toolstation.com/made4trade-compression-blank-nut/p94738
(sorry for the thread hijack OP)
3/4 bsp blanking nut for washing machine outlet.
What you have is a 1 + 1/2 bowl appliance trap . It should be plumbed in with a bigger rise on the waste from the washing machine . 1.5mtr and 2.5mtr versions are available with a plastic crook to help support the lift. Swaged 17mm connectors are also available to join 2 x 1.5mtr hoses together to enable a longer run .
You may need to slightly re -engineer the design to give you more room . Mcapline do a sink waste bsp to compression 40mm adapter so you can do a cut and shut.
Matty, like this, with a rubber washer/rubber disc https://plumbinbits.co.uk/product/brass-3-4-cap-washer/