Proper venting - I am connecting a toilet and shower to a 3" main drain line, downstream of a lav that has a 2" vent. Lav - Vent - Toilet - Shower - Septic. Do I need to vent the toilet and/or shower or will the 2" lav vent suffice? Thanks.

Grant

If wet vents are allowed in your areaa a single vent will do. Here's how we rough our bathrooms in my area. Good luck, Tom

Thanks!

Grant