View Full Version : How much can a 3 inch drain tolerate?
07-19-2005, 04:32 PM
I am doing some remodeling. I currently have two bathtubs, a shower, three toilets and three sinks draining to one three inch (3.5" O.D.) main pvc drain pipe. I plan to add a shower and a sink. Is this a problem?
07-19-2005, 04:35 PM
Three toilets is the max on three inch. As long as you don't add another toilet you are fine.
07-20-2005, 02:33 PM
Just out of curiosity, what is the max permitted toilets for four and six inch drains?
07-20-2005, 03:07 PM
Off the top of my head I think 4" you can have something like 48 toilets. I do stand to be corrected! As far as 6" I have no idea don't use it much!