Washing Machine & Combi Condensate Drain

[James Snelling]

I'm putting in the drain pipe work for a boiler above a washing machine.

Worcester-Bosch show the condensate pipe connected with a Y after the trap, but as the trap will be quite low done for the washing machine, I'm not sure if this is practical.


Is this arrangement OK?


Many Thanks

JAMES

 

[IDCHAPPY]

It looks ok to be honest 🙂

 

[kirkgas]

The diagram is the way it is in case the waste blocks, they don't want the water backing up into the boiler, in the diagram the sink will overflow and protect the boiler, in your configuration the water will spill out the pipes and protect the boiler so it's fine

 

[Killy Bing]

The diagram is the way it is in case the waste blocks, they don't want the water backing up into the boiler, in the diagram the sink will overflow and protect the boiler, in your configuration the water will spill out the pipes and protect the boiler so it's fine

but the condensate is supposed be sealed as it forms part of the flue?

no internal air breaks

i would tee it after the washing machine trap and add a hep vo trap inline to protect from water backing up and seal with a 40mm to 21.5mm solvent weld reducer.

 

[Ru0907]

Your set up is ok. But the reason you put it in after the trap is because the condense has a trap already in the boiler and it work as I siphon. So if you have another trap in the pipe work this can affect the performance of the siphon (like having a blockage in the pipe) and cause the condense to back up into the boiler. if this happens your boiler will lock out. But with w/m stand pipes as you have an air gap at the top this shouldn't happen.

 

[Chalked]

but the condensate is supposed be sealed as it forms part of the flue?

no internal air breaks

i would tee it after the washing machine trap and add a hep vo trap inline to protect from water backing up and seal with a 40mm to 21.5mm solvent weld reducer.

hasn't worcester got an internal trap?

 

[IDCHAPPY]

I think the sealed condensate only applies if the boiler doesn't have an internal trap?

 

[IDCHAPPY]

hasn't worcester got an internal trap?

B'ah, i was ninja'd :lol:

 

[Killy Bing]

hasn't worcester got an internal trap?

Yup it has but their literature only shows external air breaks.

even so they say you have to terminate downstream of a waste trap so that install is wrong anyway.

 

[Ru0907]

Yes your right the condense trap on the boiler is the air break that's why you are meant to fill the trap before starting the boiler. if the manufactures don't require an additional air break. By rights you should put it into the wm stand pipe as you have so there is still open vent at the top of the wm stand pipe so the siphon action works.

Ive had it before where some one fitted the condense out of a flexi corrugated pipe to get it behind some units it formed a trap in the bends and the siphon could not clear because it would create a back pressure in the pipe.

 

[dancinplumba]

How many worcestershyte boiler installs are EXACTLY like first pic ? The dimensions ? Not many I bet

 

[IDCHAPPY]

Yup it has but their literature only shows external air breaks.

even so they say you have to terminate downstream of a waste trap so that install is wrong anyway.

I guess it's not 100% right but i wouldn't be ID'ing the boiler over it 🙂

 

[Killy Bing]

I guess it's not 100% right but i wouldn't be ID'ing the boiler over it 🙂

Fully agree, but if he's altering the waste then might as well do it right 🙂

 

[Ermintrude]

It's a wb so water leaking out of plastic connections is going to happen no matter how u do conny?

Didn't dickky have this same argument and I remember looking a plonker!

 

[James Snelling]

I like the idea of using a hepvo trap and a y after the wm trap. Should have one in the shed somewhere.

Thanks to all that have provided advise.

 

[James Snelling]

It's a wb so water leaking out of plastic connections is going to happen no matter how u do conny?

Didn't dickky have this same argument and I remember looking a plonker!

Just out of interest, is that because WB produce a lot of condensate or because the quality of the syphon in the boiler?

 

[Ermintrude]

Hep trap will fail as the bladder will rot out as condensate acidic