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Affinity Gas Services Blog

Do You Still Have to Flush a Tankless Water Heater?


If you’ve ever had a tank water system, you know that it’s important to schedule a flush of the system on a regular basis. But if you’ve switched over to a tankless water heater, do you still have to get the system flushed?

The short answer is yes. If you have a tankless water heater in High Springs, give us a call to schedule annual maintenance for your system. You can also keep reading to learn why it’s still important to have this important service done on a tankless water heater.

Why Flush a Tankless Water Heater?

First, we need to explain why a tank water heater needs to be flushed. The reason that a regular tank water heater needs to be flushed on a regular basis is because of mineral deposits that are left due to hard water. Over time, nearly invisible minerals can build up inside of the water tank and impact how well it works. This buildup can also contribute to damaging its internal parts.  

A tankless water heater is just as susceptible to this buildup of minerals. There are a few reasons why it’s almost more important to have a tankless water heater flushed than a tank one. Having your tankless water heater flushed regularly is important because the system is so much smaller than a tank water heater.

Mineral buildup can have a greater impact in a smaller space. With a tank water heater, a mineral buildup can block the heating elements from getting your water to a high enough temperature. This can also happen in a tankless water heater but in addition to that potential issue, the mineral buildup in a tankless water heater can actually block the water flow as well, so that you lose water pressure over time. 

It is a good idea to have your tankless water heater flushed so that it continues to work at a high level for its entire lifespan. Having your tankless water heater flushed by one of our Affinity Master Certified technicians can help your tankless water heater last even longer since you’re protecting the system from additional mineral buildup. 

Risks of Not Flushing

You may be tempted to skip out on flushing your tankless water heater if you don’t see any negative impacts. However, when you don’t flush out the system, the scaly buildup can become more abrasive and damage components inside your tankless water heater such as the aerators and valve screens. 

This mineral buildup can also damage parts of your tankless system that allow rust to begin developing. Just like a tank water system, your tankless water heater needs to remain airtight. If it doesn’t, corrosion can cause irreversible damage to its internal components. When the damage gets bad enough, the only solution is to replace the system entirely with a new water heater.

Consider a Water Softener

If you want to go the extra step in protecting your tankless water heater and other plumbing around your home, you can invest in a water softener. It’s a great way to reduce damage to your home’s plumbing system, including your tankless water heater and other appliances such as your clothes washer and dishwasher.

Contact Affinity Gas Services today to schedule an appointment with our professionals. We’re “The Gas Efficiency Experts.”

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