How often should you test your water heater pressure relief valve?

This task protects people, not just the house. Do it on a schedule to make sure it gets done.

Staying on schedule matters beyond the repair bill: a consistent maintenance record is one of the factors in a home's Roots Home Health Score, and well-kept homes typically sell faster and closer to asking price.

How to do it

The temperature-and-pressure relief valve is the heater's safety vent; it opens if pressure or temperature climbs dangerously. A stuck valve can't protect the tank, and a corroded one leaks.

1. Place a bucket under the discharge pipe end.
2. Lift the valve's test lever partway and let a burst of hot water flush through, then release it.
3. Confirm the valve snaps shut and stops cleanly with no ongoing drip.
4. If it keeps dripping or won't release, replace the valve.

Alternatives & optional extras

• Test gently and infrequently; an old valve can fail to reseat once disturbed, so be ready to replace it if it weeps.
• A valve that discharges on its own signals excess pressure or temperature that needs diagnosing.

Time: 10 minutes · Typical cost: Free to test; $15–$30 for a replacement valve

If you skip it

A seized relief valve leaves the tank with no pressure safety, and in the worst case a badly overpressured heater can rupture.

Other water heater maintenance

• Flush water heater tank — once a year
• Check water heater anode rod — every 3 years
• Check water heater for leaks and corrosion — every 6 months

Related systems to keep on schedule

• Boiler / radiators — start with: schedule boiler service, once a year, ideally in September
• Furnace / heating system — start with: replace hvac air filter, every 3 months
• Mini-split / ductless AC — start with: clean mini-split filters, once a month
• Air conditioner — start with: schedule ac tune-up, once a year, ideally in April