Drop for sink drain, does it need to be .25"-ft the whole length?

Canucker · 10-23-2012, 05:14 AM

Quote:

Originally Posted by dblade

Thanks for the response, I'll likely end up removing the toilet and opening the wall to see how its vented now, with nothing exposed I have no idea,

Your toilet is probably close enough to the stack that there is no venting behind it. Our code doesn't say that you can't run drainage in an outside wall, just that it needs to be protected from freezing. Way easier to do on an inside wall. Can't you run the drain in the wall, behind the toilet, till you reach the stack? Its not going to freeze in the basement

**TheEplumber** · 10-23-2012, 09:14 AM

Quote:

Originally Posted by ddawg16

Not trying to hijack the thread....

But to confirm....ALL sinks have to go into a 2" drain? Even bathroom sinks?

I was under the impression it could be 1 1/2".

Bathroom sinks are called lavs by code definition. Their Drainage Fixture Units (DFU) rating is 1. You can pipe them with 1.5"

dblade · 10-23-2012, 09:37 PM

Thanks for the assistance all, with the issue of running through the wall out of the way doing the rest will be *cough* simple :D