DIY Doctor UK DIY Forums

hi all...... we have an air admittance valve located in the downstairs bathroom soil pipe stack, all been OK.....I now want to fit a new upstairs bathroom, that will eventually connect to the same drain (underground outside), and wonder if this is OK as the new bathroom will be located above the level of the existing valve?

thanks

john
UK

montyp,
You will have to fit another AAV in the new bathroom.
end