Unidentified pipe (moved from Projects)

[Dallypro]

Hi All

New to DIY. Have just started on my very first house (1930's semi), and its full of surprises.

I found this pipe boxed in in the bathroom. I have no idea what it is, but at a guess its something to do with a vent for a capped chimney.

Can anyone confirm for me? I would like to shrink it so i can put the bath in that corner. Any guidance on this would be much appreciated.

Image in next post as i can't get it to work properly!

Thanks in advance

Dallypro

 

[Dallypro]

Picture!

 

[rsgaz]

It's an air admittance valve. It lets air in (but never out) when you flush the toilet so that the suction doesn't suck out water from the traps for the sink/shower/etc and therefore let foul smell come out of the sink/shower/etc.

Gaz

 

[JohnD]

(but never out)

Ha ha!

 

[Dallypro]

Hi Gaz

Thanks for the prompt response. So somewhere this is connected to the sewage pipe - best get exploring.

Is it normal for it to be in the bathroom? And will shrinking it do any harm?

Thanks again

Dallypro

 

[Madrab]

Depending on what is connected to it, its needs to be higher than the spillover level of the tallest appliance that is connected to it.

If it causes real issues it could probably be moved but that would require a bit of planning by someone that has experience.

 

[Patsy1]

Hello, bit of a long shot, but can anyone tell me if this an air admittance valve at the top of the stack. It's in a void between two walls upstairs. Photo taken from boxing in floor level looking upwards into the void. I'm moving house and buyers have said theat they assume there isn't one as they can't see one on roof or in loft. Hoping that this is it! Many thanks

 

[Hugh Jaleak]

Looks like it to me, but odd place to put one! They can stick open and therefore should be accessible for maintenance if required.

 

[oilboffin]

Know what you mean johnd ha ha

 

[HERTS P&D]

He means when they go faulty.

Andy