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31 Oct 2000 at 2:07 pm
#288548
fourth year
Participant
If you turn the two letters on their sides, you will see that the outlet of an “S” trap points down and the outlet of a “P” trap goes sideways. An “S” trap is illegal since it creates a perfect syphon and while it will drain the sink quicker, it will also draw the water for the trap seal out of the trap and result in minimal or no seal.