Water Heater Maintenance: Flushing, Anode Rods and Safety Checks

Annual attention is a common starting point, and hard-water homes may need it more often. Tankless units in scale-prone areas are usually descaled on a schedule tied to water hardness and use. We set a schedule around your unit and your water.

Many tank manufacturers call for flushing at least once a year, and hard-water homes may need it more often, so check your manual. If a tank has never been flushed, we check its condition first and recommend flushing only where it makes sense.

It depends on the tank model, how much of the rod remains and your water. Some tanks have limited access. We inspect where suitable and explain the options.

Looking for leaks and keeping the area clear are fine. Work on gas, electrical, venting or the T&P valve should be left to a qualified professional. Always follow the manufacturer manual.

Manufacturer warranties often depend on correct installation and reasonable care, but terms vary by model. We keep a record of the work we do. Check your warranty documents for specifics.

Sometimes, with caution. Long-neglected tanks can hold hardened scale that does not drain out, and flushing can disturb a drain valve that has been closed for years. We assess the condition first and tell you what to expect. If the unit is old, we also discuss whether the money is better spent on replacement.

Some manuals describe lifting the lever, but an older valve can fail to reseat and start leaking afterward. Ask before you try it. As part of a maintenance visit, we check the valve, the discharge pipe and signs of pressure or thermal expansion problems.

It has to be inspected to know. Clues include a rotten-egg smell, a rumbling tank and a unit of some age that has never been checked. Some tanks make the rod easy to reach and others do not. We look where access allows and explain whether to replace it.

A tankless heat exchanger is descaled by circulating a descaling solution through it with a pump, using isolation valves, following the manufacturer instructions. If your unit has no isolation valves, they are added first. We do the descale and set a schedule based on your water hardness and use.

Regular maintenance can help: flushing where it suits, an anode check, a sensible temperature setting, a working relief valve and treatment for hard water. Fix small faults early. Nothing stops age, so we tell you honestly when a unit is nearing the end of its useful life. See water heater repair.

For a short trip, many manufacturers offer a vacation or low setting. For a longer absence in winter, the house must stay heated and the plumbing protected from frost. Check the manual for your model, and ask us if you are unsure about restarting a gas unit afterward.

It helps. We check the vent for joints, slope and terminations, look at combustion air and the flame, and test safety devices. Ontario rules generally call for working carbon monoxide alarms in homes with fuel-burning appliances. Test your alarms regularly and replace them at the end of their stated life.