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Yes, Your Tankless Water Heater Still Needs This Service

Tankless water heaters have gained popularity in Boynton Beach, FL, for their energy efficiency, endless hot water supply, and compact design. Unlike traditional tank-based water heaters, tankless models heat water on-demand.

They provide hot water whenever you need it. While tankless water heaters need less maintenance compared to their tank counterparts, they are not entirely maintenance-free. Let’s take a look at the water heater services your system still needs to guarantee optimal performance and longevity.

The Misconception of No Maintenance

Because of these systems’ more advanced design, one common myth is that they don’t require any maintenance. While it’s true that tankless units have fewer components that can wear out compared to tank-based heaters, they still benefit from regular check ups to keep them running smoothly and to prevent issues.


This process involves removing mineral deposits that accumulate inside the heat exchanger over time. These scale or limescale deposits are more common in areas with hard water where water contains high levels of minerals like calcium and magnesium.

Over time mineral buildup can insulate the heat exchanger. This can reduce its effectiveness and cause the unit to work harder to heat water. The result is higher energy use and increased utility bills. Scale buildup can lead to uneven heating of water and fluctuations in water temperature.

If this happens it can affect the performance of your tankless water heater. The accumulation of scale can shorten the lifespan of your unit by causing corrosion and other damage to internal components.

How to Perform Descaling

While descaling is a maintenance task that should be performed by a professional, here’s an overview of the process:

  1. Start by turning off the power supply to the tankless water heater.
  2. Close the water supply valve to the unit to prevent water flow during the process.
  3. A solution that is often made of vinegar or a special descaling product, is circulated through the heat exchanger to dissolve the mineral deposits. It breaks down the scale and allows it to be flushed out of the system.
  4. After, the unit is thoroughly flushed with clean water to remove any remaining descaling solution and loosened scale.
  5. Open the water supply valve to allow water to flow through the unit again.
  6. Turn the power supply back on and test the unit to ensure proper operation.

When to Schedule Descaling

The frequency of descaling depends on the hardness of your water and the manufacturer’s recommendations. In areas with extremely hard water, descaling might be necessary once a year or even more often. Even if you have relatively soft water, it’s advisable to schedule descaling every few years to maintain high performance.

While tankless water heaters are known for their efficiency and convenience, they are not exempt from maintenance needs. Descaling is an important service that your tankless water heater requires to ensure efficient operation, consistent hot water supply, and a long lifespan. 

At Admiral Plumbing Services, LLC, you can count on nice people and super service. Contact our super friendly team today!

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