Any thoughts on this layout? Will it pass inspection?

[maxwellm]

This is a mudroom conversion into a bathroom with vanity/shower/toilet.

Based in Portland, OR (Washington County specifically)

The pitch is 1/4”…I just have to connect it to the main line in the crawl space.

Any potential issues you see?

Can there be one dry vent for all 3 fixtures?

Thanks for any advice.

 

[Jeff H Young]

it fails. you need a 2 inch vent

 

[Sponsor]

 

[Breplum]

You also need a 3" cleanout serving at the end of any run longer than 5'
All pipe must be rigidly strapped with no metal in contact with plastic.

 

[wwhitney]

it fails. you need a 2 inch vent

Which, to be clear, includes the lav drain downstream of the san-tee, because the lav drain wet vents the shower and WC. The lav trap arm can remain 1-1/2".

Cheers, Wayne