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  1. R

    HepvO valves or Air Admittance valves instead of open vent

    Since initial post earlier today, I spoke with 'Institute of Plumbing & Heating Engineering', they have a public helpline which is nice of them. The man on the phone said: 1) HepVo doesn't help at all with air admittance / ventilation they are basically just a waterless trap. 2) If I...
  2. R

    HepvO valves or Air Admittance valves instead of open vent

    Okay. Thanks for the advice. I have now spoken with my local Building Control department at the council. In order to receive advice from them, I must submit a Building Notice application (£117.50) and I will then be entitled to a site visit and advice on the correct way to proceed - I...
  3. R

    HepvO valves or Air Admittance valves instead of open vent

    Hello. Having read lots of posts and gained plenty of information that's been of great use during my current bathroom refit - I now have a quick question! Presently in our bathroom - our basin, bath and WC connect to a discharge stack that is boxed in and goes up through the ceiling and...
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