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View the thread, titled "Air admittance valve below toilet" which is posted in Boiler Advice Forum on UK Plumbers Forums.

J

Jack Ng

Hi,

I am installing a new en-suite toilet upstairs in a new location , the soil stack is installed by my builder going downstairs directly and into the ground where the main sewers are. He’s installed the air admittance valve on the floor below , which is slightly below where the toilet is.

I asked the plumber if it’s ok as it’s below the toilet , he said yes, but most places I read online saying it needs to be above a certain level.

Can you help me please , as the plumbers insisted it’s ok.
 
Depends on the type of vent he’s installed some are ok below toilet level?
 

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Title
Air admittance valve below toilet
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Boiler Advice Forum
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Jack Ng,
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