Do I need a sewer vent pipe for an additional new bathroom?

[Deguza]

Hello all,
I am planning to add a bathroom to a bedroom. The new one will be about 20 ft or so away from the existing one.
I am in San Jose CA.
Would I need a vent pipe for this new bathroom?
Thanks!
Deguza

[hubops]

On Mon, 14 Dec 2020 15:46:46 -0800 (PST), Deguza [e-mail] wrote:

Here ya go :
Building Information Inspector - For questions regarding building permits, codes, inspections or plan review, leave us a message and we'll respond within two business days:
Email: [e-mail] Voicemail: 408-535-7641
John T.

[invalid unparseable]

Curious and googled this:
Maybe a bitch to go through.
I know I could find our county's codes on line but took a bit of trying.

[gfretwell]

On Mon, 14 Dec 2020 15:46:46 -0800 (PST), Deguza [e-mail] wrote:

Short answer, Yes. Venting can get pretty complicated but a general rule is if the fall of the drain pipe is more than the diameter of the pipe you need a vent. Basically you need a way to break the vacuum created when water flows through the drain pipe. They do make a studor vent, essentially a check valve that breaks the vacuum but some building departments hate them. I don't think you can use them on a toilet at all. The real answer comes from the building department but I bet they will want to see a vent typically on the stack from the sink.

[trader_4]

+1
If the new bath is on the top story or if it's single story, an additional vent is no big deal. If not, I think there are other alternatives, like a widget that acts as a one way air admittance valve. Whether you can use one of those for a whole bathroom though, IDK.

[HusTler]

To: trader_4 Re: Re: Do I need a sewer vent pipe for an additional new bathroom? By: trader_4 to alt.home.repair on Tue Dec 15 2020 11:24 am

Yes --- Synchronet 3.18a-Linux NewsLink 1.113 * Havens BBS - Queens, Ny - telnet://havens.synchronetbbs.org

[Deguza]

Thank you. These are really helpful.