Waste solution for integrated washing machine.

BennyC · 16 Jan 2023 at 19:28

Evening All,

Fitting my O/H's new kitchen at the weekend and now need to source (or at least discuss) options for the washing machine waste, as we are a little short on space to get the fridge-freezer in fully.

The washing machine is in a twin cupboard with the fridge freezer, which is on the opposite side of the room to the mains feed and sink. So the rear of the cabinet has a little pipe work behind it. Namely a 40mm trap which takes up 6-7cm of depth.

Originally the waste pipe (which comes out the floor) was behind the washing machine stopping it fitting in fully. So I moved this (below floor level) to behind where the fridge is. Whilst this now means the washing machine fits perfectly, we are shy on depth for the fridge/freezer instead

But as it is the shallower of both appliances it is the better option.

Is a U-Bend really necessary for washing-machine and sink waste? Most appliance waste hoses require an inverted 'U' shape during installation so I'm wondering if this is good enough to stop any odours and we could simply mount a hose connector on to the waste pipe just above floor level and be done with it?

Thanks.

Buffman · 16 Jan 2023 at 20:03

BennyC said:
Evening All,

Fitting my O/H's new kitchen at the weekend and now need to source (or at least discuss) options for the washing machine waste, as we are a little short on space to get the fridge-freezer in fully.

The washing machine is in a twin cupboard with the fridge freezer, which is on the opposite side of the room to the mains feed and sink. So the rear of the cabinet has a little pipe work behind it. Namely a 40mm trap which takes up 6-7cm of depth.

Originally the waste pipe (which comes out the floor) was behind the washing machine stopping it fitting in fully. So I moved this (below floor level) to behind where the fridge is. Whilst this now means the washing machine fits perfectly, we are shy on depth for the fridge/freezer instead But as it is the shallower of both appliances it is the better option.

Is a U-Bend really necessary for washing-machine and sink waste? Most appliance waste hoses require an inverted 'U' shape during installation so I'm wondering if this is good enough to stop any odours and we could simply mount a hose connector on to the waste pipe just above floor level and be done with it?

Thanks.

Yes a u bend is necessary if you don't want sewage odours coming back up. Bit naughty but if it's a suspended floor could you fit the u bend under the floor and put a trap in the floor for access if required?

BennyC · 16 Jan 2023 at 22:15

Buffman said:
Yes a u bend is necessary if you don't want sewage odours coming back up. Bit naughty but if it's a suspended floor could you fit the u bend under the floor and put a trap in the floor for access if required?

Yep, I left an access panel in the floor, so could remove the unit and mount the U-Bend below. I'd planned to keep it accessible if ever needed for service but I don't think this is going to be possible so may very well have to drop it below the floor if all else fails.

Orifice · 16 Jan 2023 at 22:34

Could you fit one of these anywhere with less hassle? https://www.wavin.com/en-gb/catalog...-HepVO-waste-valve/HepVO-PP-Waste-Valve-WT-40 Not particularly cheap, but they do work.

Buffman · 16 Jan 2023 at 22:44

BennyC said:
Yep, I left an access panel in the floor, so could remove the unit and mount the U-Bend below. I'd planned to keep it accessible if ever needed for service but I don't think this is going to be possible so may very well have to drop it below the floor if all else fails.

I don't think I really understand the issue, do you have another unit beside the washing machine? Just put the u bend in the gap behind adjacent units and cut an opening in them. You could even hide the opening if you care.

aVdub · 17 Jan 2023 at 04:55

BennyC said:
Yep, I left an access panel in the floor, so could remove the unit and mount the U-Bend below. I'd planned to keep it accessible if ever needed for service but I don't think this is going to be possible so may very well have to drop it below the floor if all else fails.

I would always want access to whatever is fitted, be it U-Bend or non return valve.

Can you fit an access hatch?