What do I need to cap off this waste pipe?

[Howlin Mad Murdoch]

Ive just installed one of these for my washing machine and tumble dryer, utilising the two hose connectors, but I feel I should 'cap' the top to reduce smells?





I'm struggling to figure out what I need to go into it, and for that matter, does it need to be capped off?

[Metric Max]

I'm not a plumber but I have installed a few sinks etc in my time and that connection is for a sink waste
Also did you mean for a washing machine and a dishwasher rather than a tumble dryer?

[Howlin Mad Murdoch]

Metric Max said:

I'm not a plumber but I have installed a few sinks etc in my time and that connection is for a sink waste

It is, but there is no sink, so was hoping to cap it off? The washing machine and dryer drain into it via the hose connections.

[Regbuser]

[Howlin Mad Murdoch]

Thanks but I need to cap off this bit....

[GasEngineer]

https://www.amazon.co.uk/Qrity-Kitchen-Blanking-Fe...

should do it.

[Howlin Mad Murdoch]

Isn't that 'female to female'?

[tim0409]

GasEngineer said:

https://www.amazon.co.uk/Qrity-Kitchen-Blanking-Fe...

should do it.

Won't he need a male thread?

[.:ian:.]

I'm not sure such a thing exists, to screw onto it you need a 1 1/2 or 1 1/4 inch (can't read the tiny text) male thread.

Easiest option might be to find a pvc blanking plug the same size as the internal diameter of the pipe and solvent weld it in.

You might find it doesnt drain well as there's no way for the air to get in/out.

[Opapayer]

Are you using the hose connectors to drain the washing machine? If so you absolutely need to cap off the top of it, otherwise you’re going to get water splashing everywhere whenever the washing machine drains. Isn’t the normal approach that the hose from the washing machine is fed a fair distance down the larger bore hole at the top to eradicate splash back?

[Rough101]

You can t fully cap it off, you ll air lock it.

McAlpine do a double inlet with wraith an air break cap, but it fits a standing pipe, not the sink waste you have, I ve one on my drier and washer which have a dedicated trapped standpipe, the dishwater goes into one under the sink.

https://www.screwfix.com/p/mcalpine-twin-hose-conn...

Edited by Rough101 on Sunday 21st December 14:22

[GasEngineer]

tim0409 said:

GasEngineer said:

https://www.amazon.co.uk/Qrity-Kitchen-Blanking-Fe...

should do it.

Won't he need a male thread?

Ah yes - got wrong end of the stick !!

[Regbuser]

You'll have to bodge an AAV into the unused waste

[Little Lofty]

Why not use a good old fashioned washing machine standpipe, that fitting is for a sink.

[Howlin Mad Murdoch]

Little Lofty said:

Why not use a good old fashioned washing machine standpipe, that fitting is for a sink.

Two reasons.:

1. I wanted a 'neater' install.
2. I have bought and fitted the bugger, so come rain or shine, I will get it sorted!

Having pulled the machine out but still plumbed in, I watched it drain, and apart from a bit of foam appearing near the top, nothing came out. So I'm just going to use the old upright from the previous standpipe, just in case the water backs up a bit.

Thanks for all the contributions.

[bobtail4x4]

stick a wooden bung in

[cliffords]

bobtail4x4 said:

stick a wooden bung in

Yes I was thinking a cork from a place that sells winemaking equipment

[bobtail4x4]

the posh answer

[MattyD803]

Howlin Mad Murdoch said:

Little Lofty said:

Why not use a good old fashioned washing machine standpipe, that fitting is for a sink.

Two reasons.:

1. I wanted a 'neater' install.
2. I have bought and fitted the bugger, so come rain or shine, I will get it sorted!

Having pulled the machine out but still plumbed in, I watched it drain, and apart from a bit of foam appearing near the top, nothing came out. So I'm just going to use the old upright from the previous standpipe, just in case the water backs up a bit.

Thanks for all the contributions.

As advised above, you’ve got the wrong fitting/application here. You’ll get it to work with a bit of vertical pipe connected into the sink connection and left open to prevent an airlock - This pretty much ultimately replicates the tradition method of feeding a discharge pipe into a stand pipe. You shouldn’t get any smells, as you’ve got a u-bend there, sealing in smells.

The issue will be if, over the years, that u-bend gets clogged with crud, that could easily back up and overflow into your cupboard when one or either machine next discharges.

Edited by MattyD803 on Sunday 21st December 22:47