effinoff
Oct 3, 2010, 05:29 PM
Why can't a toilet be installed upstream from a sink or shower?
ballengerb1
Oct 3, 2010, 06:54 PM
That only applies to a branch drain line. It's a venting issue and could cause the sink trap be siphoned clean out of its water trap.
speedball1
Oct 4, 2010, 05:19 AM
why can't a toilet be installed upstream from a sink or shower?
It's strictly against code to discharge a major fixture, such as a toilet, past a unvented minor one, such as as sink. Bob gave you a great explanation.
Because it could cause the sink trap be siphoned clean out of its water trap seal. Cheers, Tom