I did a variation of this post the other day and got a wide range of yes and no answers.
Some people replied strongly “Yes” and others strongly “No”. I went to the DOB website, but found it very difficult to navigate.

I was hoping that if I posted this request again that I could ask those responding to only do so if you have first hand knowledge of the “current” code for PVC use and if it is okay in single family homes in the 5 boros for plumbing.

Also, can waste lines be 3 inches or do they have to be 4 inches?

So please only respond if you are totally up to date. That way we can get the accurate answer for myself and the Brownstoner community.

Thanks again,
Leslie


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  1. There is a lot of folklore out there on this topic.

    You are safe following 1:00pm’s advice, but the law may have changed recently to be slighly more permissive. You may be allowed 5 stories now (waste and vent only), but don’t rely on me for that. I believe there was a partial harmonization of the plumbing code with the international code and that compromise was reached. So if you look it up in the Admin Code, make sure you are working with a current volume.

  2. PVC is ok for 1 and 2 family homes up to 3 stories in height.

    Waste lines servicing a single toilet can be 3″. If they serve more than 1 toilet they must be 4″.