Welcome to Plbg.com
Thank you to all the plumbing professionals who offer their advice and expertise

Over 600,000 posts related to plumbing

Welcome to Plbg.com (aka: PlumbingForum.com) we are the most popular plumbing information sharing, advice, DIY and educational forum on the Web. Ask any toilet, sink, faucet, pump, water quality, and plumbing related questions. Please refrain from asking where to purchase a product, business, pricing, or legal questions, for contractor referrals, or any questions not related to plumbing. Keep all posts positive and no advertising. This site is free and made possible by:  

Post New
Search
Log In
How to Show Images
Newest Subjects
 Venting question
Author: woodsf (MO)

I am running a shower and a separate bathtub on a 2" drain line. The shower will be 2" all the way to the main 3" stack and the tub will be 1 1/2" tying down line into the 2" shower line.


Can I use 1 1/2" to vent or does it need to be 2". Also do both fixtures need a separate vent or can the 2" cover both fixtures.

Post Reply

 Re: Venting question
Author: packy (MA)

no way to answer that without seeing a diagram with distances noted.
as a side note, i would not drain a tub into a shower drain. you are asking for a footbath in the shower when you dump a tubfull of water.

Post Reply

 Re: Venting question
Author: hj (AZ)

all you need is 1 1/2" vent, but whether you need one or two vents depends on how you install the piping.

Post Reply

 Re: Venting question
Author: woodsf (MO)

I should have stated this more clearly. The tub connects to the 2" line 7' past the shower and 6' to the main stack

Post Reply

 Re: Venting question
Author: hj (AZ)

Again, whether you need one or two vents depends on WHERE you intend to put them.

Post Reply

 Re: Venting question
Author: mr leak (CA)

One inch and a half vent is fine as you describe

Post Reply





Please note:
  • Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
  • Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
  • Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
  • Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:




Special thanks to our sponsor:
PlumbingSupply.com


Copyright© 2017 Plbg.com. All Rights Reserved.