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  1. Aav

    Plumbing
    Does anyone know where specifically an air admittance valve should be installed under a double kitchen sink? After the p trap above sink water level etc?
  2. Plumbing
    I have a Venting problem but I don’t know why. This is a completely new installation. Pictures & diagram attached 2nd kitchen – 2nd floor only one kitchen per floor Problem: Sink drains very slow – several minutes if both sinks are half filled or one is block at strainer while other is...
  3. Plumbing
    I am a maintenance tech for a business and I am having an issue I hope you can help with. We have a men's and women's restroom that are back to back, (sharing the same drain) with 3 sinks in each. One of the sinks in each of the rooms, the most popular, drains very slowly. I have used drano...
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