Outdoor AAV

[tomelec]

Hi everybody.
I'm wanting to replace my iron soil pipe with a plastic one. However the pipe is purely a vent pipe with no wet connection. The toilet is connected underground somewhere. Is there any reason I couldn't fit an outdoor stub stack with an AAV? The floplast ax110 allows a shorter stack provided it's 200mm about the highest wet connection. And as the stack has no wet connection could I in theory have a 200mm stack with AAV?

 

[St0rmer66]

No, you still have a wet connection even if you can't see it. AAV is only for multiple stacks in one property, where one must always be open to air. Since you only have one then it must be open.

 

[Hugh Jaleak]

Its a vent for a reason. Replace like for like. (If in doubt see my post #11 here //www.diynot.com/diy/threads/water-coming-up-bathwaste-into-bath.466534/ )

 

[tomelec]

Makes sense. However what's the difference with a new build with a single stack, aav in the loft?

 

[St0rmer66]

Makes sense. However what's the difference with a new build with a single stack, aav in the loft?

Disaster waiting to happen?

New builds are terrible, don't use them as a benchmark for ANYTHING.

 

[Hugh Jaleak]

I have seen the drainage on new developments, how the hell they ever get it passed is beyond me. I have also been out to attend a number of new developments, (or conversions of existing buildings into flats), to deal with drainage problems.

Only once these places are occupied do the problems manifest. Just been to one where they'd 'lost' half a brick down the connection into the road, on lifting another manholes nearby to check things out, we discovered a whole host of other problems, none which were going to be cheap to sort out! The Developer had offloaded the flats to a property management company, and was nowhere to be found....