Some bathroom and kitchen sinks have “S” traps like this one that drain into the floor. It’s important that sewer gas doesn’t get trapped in them. Proper venting of drain lines ensures that a small ...

Traps are the J-shaped devices connected to the bottom of sinks and bathtubs. The most common type, installed under most house sinks, is referred to as a "P-Trap." They retain about a cup of water in ...