THIS IS A HAMMER

Why Drain a Hot-Water Heater?

Q: A neighbor of mine said that he drains his hot water heater twice a year to keep it clear. Won’t draining the heater damage it? — Sal P., Tallahassee, Fla.

A: Actually, draining the water heater can help it heat water more efficiently and even extend its service life. The trick is to turn it off and let the water cool for a few hours. Then, shut off the water supply to the heater so it won’t refill as you drain it.

Note: If you need to turn off the water supply to the entire house or part of the house in order to turn off the heater’s supply, open the taps on t...