Q: Our senior community newspaper said to “make sure you run at least a quart of water in all the seldom-used sink or tub drains in the house every few weeks, as they can dry out and allow sewer gas ...

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 ...