Tankless Water Heater Maintenance Methods

by | Aug 24, 2022 | Plumbing

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Proper maintenance is key to keeping a water heater system running efficiently and extending its longevity. Cleaning is the most direct basic maintenance activity, and tankless water heaters sometimes require specialized attention. For example, mineral deposits in the pipes require descaling, while an inline filter reduces build-up.

When you doubt your ability to conduct the maintenance in-house, engage your trusty tankless water heater service in Phoenix, Arizona.


A system running on hard water needs regular descaling. Descaling is a process of removing accumulated grime as the minerals in water settle in the heater system. Descaling is similar to the flushing-and-cleaning process but includes running vinegar through the tank to break down the deposits. 

Rinse the system for about 45 minutes after demineralization to remove all the vinegar and gunk matter.

Flushing the System

Tanks require regular cleaning, whether holding soft or hard water. The flushing process uses the water force to clean the unit and remove mineral deposits. Flushing and cleaning at least once or twice a year keeps the unit healthy and efficient.

Flushing a tankless water heater system involves these manufacturer’s steps:

● Turn off the power and water supply to the heater.

● Connect a tiny hose to each isolation valve and a smaller pump to the cold-water hose.

● Place the hot water and circulation pump inlet hose into a five-gallon bucket with water.

● Turn on the pump and allow it to circulate water through the tankless water heater for up to an hour.

Regular and thorough maintenance is crucial to keeping the tankless water heater system reliable and efficient. Waiting until the unit breaks down will mean the inconvenience of lacking hot water until it is repaired. Moreover, the cost of repair is almost always higher than maintenance. Routine checks do not eliminate every chance of a problem occurring, but they lower the risk significantly. Call an expert now from Armstrong Plumbing and enjoy the service.

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