I am planning the DWV for a two-story house in Lincoln County Oregon using UPC code. The county has a "plumbers guide" with photos. I'm trying to make sense of one thing.
They have a several photos of the drain stack from the upper story going down to the lower story and bending into a lower story stack.
They never have photos of the upper story stack going straight down and the lower story stack bending into the upper story stack. Is there a reason they choose to wye into the lower story and not have the lower story wye into the upper story stack? Slow down the waste?
Hope this question is worded okay. Thankyou.
They have a several photos of the drain stack from the upper story going down to the lower story and bending into a lower story stack.
They never have photos of the upper story stack going straight down and the lower story stack bending into the upper story stack. Is there a reason they choose to wye into the lower story and not have the lower story wye into the upper story stack? Slow down the waste?
Hope this question is worded okay. Thankyou.