Plumbing plan, venting, drain size and inspection

Discuss plumbing related issues here - pex, drains, etc.
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Plumbing plan, venting, drain size and inspection

Post by lamp » Sat Dec 13, 2014 1:57 pm

Hi Shannon,

I was wondering if you could give me your thoughts on the attached plumbing drawing - do you think it would pass an inspection in Ontario?

Also, I'm curious to know whether or not it's legit to have the bath attached to the WC drain using 1.5" pipe. Should the bath connecting to the WC drain via a 2" pipe instead? Keep in mind, the bath would have a dedicated 1.5" vent (as illustrated).

Thanks again,
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Re: Plumbing plan, venting, drain size and inspection

Post by Shannon » Sat Dec 13, 2014 5:47 pm

It looks fine to me but I would use 2" drains on the tub . Be sure the drains for the tub and lav. come in at the top of the WC pipe to prevent back flow. The tub should not require its own vent as they are built in at the overflow. When in doubt check with your local inspection agency , sometimes they even have hand out info to help you out.
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