Advice on Dripping Extractor Fan

[LennyC]

Can anyone offer any advice? I had a bathroom refitted a couple of months ago. The fitter cut the soil stack vent and fitted an air admittance valve. He then moved the extractor fan, fitting it to the soil stack hole in the ceiling. Now the extractor fan drips constantly when the shower is running. I've contacted the fitter who says:

Re: fan, the condensation or/and the lack of a cowl on the top of the vent stack suggests that the problem you have is not a direct result from anything I did but an unforeseen issue.


Can anyone advise if this issue could have been foreseen? And what i need to do to resolve?

Thanks,
Len

 

[Whyme]

Extractor goes through ceiling then roof where vent was ? Where does the vent for extractor go ?

 

[snowhead]

Extractor goes through ceiling then roof where vent was ? Where does the vent for extractor go ?

I read it as the stack has been cut and shortened with an AAV added and the remaining stack that went through the roof now has a fan in it in the ceiling.

Therefore vertical vent, no cowl on top, condensation forming in the old stack pipe on the way up to the roof.

And the bathroom fitter thinks it's nothing he's done, that's correct.
It's as a result of something he should have done and hasn't.

 

[Rickster123]

Are you sure it drips when you shower? Or does it drip when it's raining and you are in the shower?!

 

[Whyme]

If hes use 110mm plastic instead of the flexible "elephants trunk" ya can fit one of these above the extractor. But then you need to get the overflow pipe away somewhere. Condensation Trap 100-110mm with Overflow Connection [497] - £6.62 - Fastlec.co.uk.

ps he should have fitted it to a tile vent to stop rain.

 

[brum]

As above plus the use of an insulated flexible pipe to stop condensation as per NHBC regs..brum

 

[chris watkins]

As above but you may find the McAlpine ones easier to get hold of.
O/F pipe from it can be piped outside through the soffit or fascia & It may also help if you insulate the 110mm pipe with rock wool or the like.

110mm Condensation Trap | McAlpine Plumbing Products

 

[Whyme]

^^^Thats the one i was trying to find good call

 

[LennyC]

Drips when the shower is running, when it definately hasn't been raining.

 

[LennyC]

Yes, remaining stack has fan attached, pipe stack goes through attic to outside roof. Do you think this issue should have been foreseen?

 

[chris watkins]

Yes, remaining stack has fan attached, pipe stack goes through attic to outside roof. Do you think this issue should have been foreseen?

Only if you employed someone who new what they were doing !!!

 

[solutions]

If the fitter claimed to be a professional in the field of bathroom installation. Or he was part p certified to carry out electrical works in special areas ie bathrooms then YES completely foreseeable. But a bodge is quicker and cheaper so if you got what seemed like a great price, now you know why.

 

[Worcester]

If it's dripping (condensation) then it is NOT fitted in compliance with the building regs - is he a member of a CPS for ventallition?

If not then has ne notified building control?

NOTE: EVEN REPLACEMENT fans are subject to CURRENT Building Regs.

Get him back to fix his no-compliant work

 

[AWheating]

i should add he should not have cut your open vent out either unless he investigated the draining routing/design.