Putting bathroom and utility sink in garage-help!

Users who are viewing this thread

snorkey

New Member
Messages
1
Reaction score
0
Points
0
Location
Seattle
Hi everyone, this is my first post. I've tried searching this site for answers (I do like the site) but I guess I'm a dumb a** when it comes to search. I am putting a bathroom in my garage, Outside of the interior bathroom wall, I also want to add a utility sink.
I'm concerned about how I'm tying in the sinks. Am I allowed to tie them into the 3" stack? sanitee or upright combo? See pic please.
Or is it all wrong because it's upstream from the toilet? I'm freaking out.
I want to make sure I get it right for the inspector. I'm not a pro, , just working on my own place and hope someone
can offer their thoughts, or suggested fixes in laymans terms. Thank you all.
bath layout 2.jpg
 

Tuttles Revenge

In the Trades
Messages
4,458
Reaction score
1,572
Points
113
In Seattle, we use the 2018 UPC code with Washington state amendments with some seattle/king co specific amendments (some unwritten even... fun) thrown on top of that...

In general every fixture requires a trap to keep sewer gases from escaping into your living space. To protect the trap from siphoning, every fixtures trap must be vented (properly). Your drawing sort of indicates that you're attempting to put together a Horizontal Wet vented bathroom which is good.. However, ONLY bathroom fixtures may be included in that system. The utility sink is not considered a bathroom fixture and must not travel through that drain/vent system, but can tie in downstream. I find its generally still less work and fittings to go ahead and run the 2 drains separate and parralel til they can tie in downstream.

Assuming this garage is located on a property with a home that already has plumbing.. The vent only has to meet the requirements of the DFU's / drainage fixture units of the fixtures its venting which is 2". Each of the separate branches needs a cleanout that serves the entire run. So 3" up to the bathroom sink for that run and 2" at the utility sink for that run.

1682522537650.png
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks