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 ...

Sooner or later, just about everyone who uses a sink will need to become familiar with the drain trap, the J-shaped piece of pipe underneath the sink. A trap can work for years without problems, then ...

In experimental sinks, it took just seven days for germs to climb up from the P-trap.