1/2 Bath Addition

[brb]

Hello! Received some great help in the past and am looking to see if this is the correct DWV for my half bath addition. I assume that as long as I tie into the main drain before the back flow device for the basement bath I am ok? We have the UPC plumbing code rules in my state (MN). Thanks for any help!

 

[Terry]

The lav can wet vent the toilet if it remains 2" through the roof.

 

[Sponsor]

 

[brb]

Ok. Otherwise I would need to install a separate vent for the toilet before the lav ties into the drain? This would probably also need to be 2in?

 

[brb]

Is this connection for the lav drain to toilet drain ok? it is a 90 3in with a 2in connection going into the side of it. I think not but saw the fitting and wanted to get an opinion. I assume I would need a regular 3i 90 followed by a long sweep 3in to 2in to make this work properly.