We have an old bungalow and are adding a half bath upstairs. I had a plumber out who suggested setting it up like this:
Lav drain into floor, horizontal run 2 ft, tied into 3" WC line, then drop vertical to basment with 3", then horizontal run to tie into 4" main line.
He said there is no need for a vent, which I find odd. The total run from lav to main stack is about 25 ft including horizontal and vertical runs.
He also said 3" is fine, but I am unsure how 'fine' it really is.
My guess is that there needs to be a vent...likely Lav drain, then toilet drain, then vent, then drop to basement.
The problem of course is getting access to the roof in this finished room, but I'm sure it can be done.
any input?
Lav drain into floor, horizontal run 2 ft, tied into 3" WC line, then drop vertical to basment with 3", then horizontal run to tie into 4" main line.
He said there is no need for a vent, which I find odd. The total run from lav to main stack is about 25 ft including horizontal and vertical runs.
He also said 3" is fine, but I am unsure how 'fine' it really is.
My guess is that there needs to be a vent...likely Lav drain, then toilet drain, then vent, then drop to basement.
The problem of course is getting access to the roof in this finished room, but I'm sure it can be done.
any input?
