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View Full Version : What is an s trap for bathroom sink?


marysr
Aug 18, 2009, 12:10 PM
What is an s trap?

ballengerb1
Aug 18, 2009, 01:04 PM
S traps can be installed if you are replacing an existing s trap, other than that I believe they are no longer allowed by code. If you look under most sinks you will see a P trap, frequently called a J trap. It drops down from the verticle drain pipe and forms a J shape before going horizontally into the wall. A S trap is like 2 Js put togethermaking an S shape laying on its side so it can drain straight down through the floor. They are prone to siphoning so not allowed.