Plumbing stacked washer from new utility

[MidsTW]

We are thinking of using our study which is next to the downstairs WC as a utility room. This would feature a stacked washer and dryer backing into the wall which contains the water supply and near to the sink drains.

I’ve seen a few posts not recommending sink drains due to the lack of a stand pipe etc, but our current washer is just plumbed into the kitchen sink drains and isn’t even that high.

If the washer was at the top and the drain went up and into the stand pipe, then down and through the wall into the WC sink drains. Would that be a reasonable solution?

Diagram attached.

 

[Scally-Ho]

IMO you will regret placing the washer over the tumbler. What about fitting an appliance trap to the sink and then connecting the washer's drain into that? If the link times-out, then search Product Code: 85397 at Toolstation.

Viva Sink Trap with Single 135° Nozzle

Polypropylene 40mm P Trap with x 1 appliance spigot. Trap uses easy grip compression nuts, tapered rubber seal, rubber 'O' ring and a slip ring to give a secure water tight seal. The spigot gives the option of attaching a washing machine or dishwasher.• Suitable for 1½" pipe• Adjustable inlet•...

www.toolstation.com

 

[Harry Bloomfield]

If the washer was at the top and the drain went up and into the stand pipe,

Washing machines are incredibly heavy, and vibrate considerably when on the spin cycle. The noise, and vibration, mounted on a wall would be tremendous.

 

[MidsTW]

Yep - thanks both. Not thinking in the heat.

Scally - we have a drain with a nozzle on the kitchen for the dishwasher and washer. We are really restricted on space but I’m sure we could make it work. I guess as long as the hose is clipped and goes above the exit from the washer and then down to the nozzle it will be fine.

Tbf my current washer just runs 2 metres under the kitchen units and up to the nozzle and it seems to work fine.

 

[Madrab]

Wouldn't be ideal running a WM drain into a 32mm waste TBH, if that's a basin in the WC. WM spigots can be notorious for clogging up, not so bad in a sink as it's always used and usually gets flushed out all the time, a basin waste setup may not.

What type of floor is it, if it's suspended then shouldn't too much grief to lift a few boards and see if there's a 40mm waste and water to connect to.

 

[MidsTW]

Wouldn't be ideal running a WM drain into a 32mm waste TBH, if that's a basin in the WC. WM spigots can be notorious for clogging up, not so bad in a sink as it's always used and usually gets flushed out all the time, a basin waste setup may not.

What type of floor is it, if it's suspended then shouldn't too much grief to lift a few boards and see if there's a 40mm waste and water to connect to.

Yes, they are good points. I can see why it’s not ideal.

Unfortunately the floor is not suspended. Which has led to me asking these type of questions. My previous how had a suspended floor and it was so easy!
It’s block and beam with screed (typical new build).
Causing me quite a headache as every idea we have to extend/reconfigure is going to involve sink waste and soil pipe changes.

 

[Madrab]

Causing me quite a headache as every idea we have to extend/reconfigure is going to involve sink waste and soil pipe changes.

If that's the case then depending on how far away it is, it may be worth biting the bullet and chasing the 'crete and installing a new waste run to the existing 40mm, run a cold supply in beside it.

I have found that the most DIY problems in plumbing occur when attempting to get around an issue and taking the easy way out that really isn't standard, never seems to end up well.

 

[PolarNorth78]

You can get stacking kits for washing machines and dryers. Appreciate you may have them from different manufacturers but something to look at if not already done so. I have a stacked washer and dryer kit and it works nicely.

Personally, I would not have a wall mounted washing machine. It's 100KG machine and spinning at 1400+ RPM with (wet) probs 10-15kg of clothes inside. Thats a lot of energy and potential damage if it goes wrong.

I plumbed mine direct into the soil stack with a 75mm trap in the pipe line to stop sewer gases.

 

[simplesteve]

plumbed mine direct into the soil stack with a 75mm trap in the pipe line to stop sewer gases

Me too ? Do you have the option to just drill through the wall and connect outside ?

 

[MidsTW]

Me too ? Do you have the option to just drill through the wall and connect outside ?

Nothing outside to connect to, no nearby drain

I’m tempted to change the sink in the WC and have a bigger sink integrated into a cabinet. As the washer would be on the other side of the stud wall this would give me some room to come through the stud wall, have the necessary trap with the hockey stick in the utility room?

 

[Tigercubrider]

Yonks ago my mum had hover washing machine and tumble driers stacked.
A TD is way lighter and there was a band that sat on top of the WM with a lip that the TD sat in.
I can’t believe that something universal isn’t made these days.

What is the floor of the WC ?

 

[MidsTW]

Yonks ago my mum had hover washing machine and tumble driers stacked.
A TD is way lighter and there was a band that sat on top of the WM with a lip that the TD sat in.
I can’t believe that something universal isn’t made these days.

What is the floor of the WC ?

Ignore the washer on top of the dryer but… don’t know what I was thinking.

All my floors are block and beam with a screed. Hence my idea of connecting to the sink and waste (as low as possible)

Update: pic attached showing waste pipe and hole in floor…

 

[MidsTW]

From a supply side, i have supply to the taps in the wall, but they are 10mm microbore. Is this going to be sufficient for a washing machine?

 

[Hugh Jaleak]

10mm will feed a washing machine, although it will be slower to fill as the flow is so high.

Pic above appears to be a reducer Cap on top of the drain, to allow the original installers to connect the basin directly to the drain. It's probably going to be a faff, but it you can get that off, you should be able to replace with one offering a 40mm connection, or if you're really lucky, it may stretch enough to allow a 40mm waste pipe to be inserted in lieu of the current 32mm.

 

[MidsTW]

Had a look at the photos I took pre-plaster (wish I’d taken more) and I think the 10mm feeds for the tap will be on a tee piece reducer from 15mm. Assuming that tee piece is in the ceiling it’s an option to open up and feed a need 15mm feed to the washer.

For the waste, yes I never realised how open it was behind the pedestal. As I said I’m thinking of fitting a unit there so could easily open up the hole a little to fit a different reducer and then have the washer hockey stick feeding the new 40mm waste through the wall?