Rough plumbing layout w/ backwater check valve.

[Conde]

I am refinishing my basement adding a 3/4 bath and laundry room. I am in MN and we adopted IPC 2012 this year so I need a backwater check since my basement is below the next upstream manhole. In order to make the backwater check valve accessible I am locating it in a utility closest. In my layout, how long can I wet vent the shower and lavatory since they are in the same bathroom group on the same level?

 

[hj]

Your shower and lav are NOT vented and there is nothing to "wet vent" them with.

 

[Sponsor]

 

[Conde]

Your shower and lav are NOT vented and there is nothing to "wet vent" them with.

Would adding a vent upstream of the backwater valve solve this issue? I am showing the proposed location in red in the attached.

 

[Conde]

Would adding a vent upstream of the backwater valve solve this issue? I am showing the proposed location in red in the attached.View attachment 34353

Anyone have any input on this? I am going to be glueing it up tonight.
Thanks everyone, this website is a great resource!

 

[hj]

That "vent" is purely cosmetic at that location. It has to go in the shower line, but there is NO WAY to make it work for the lavatory as drawn.