S-Traps vs. P-Traps
Drain traps have been around for a long time — probably longer than you realize. In fact, a Scottish watchmaker filed the first patent for an S-trap in 1775 after he designed a way to stop losing small watch parts down the drain. The curve in the S-trap collected the watch pieces. It also held just enough water to form a seal in the drain that could stop sewer gases and odors from entering the room through the drainpipes, leading to significant advances in bathroom design.
Read now
