Tankless water heaters have become increasingly popular for their energy efficiency, compact design, and ability to deliver endless hot water. However, like any appliance, they require regular maintenance to keep working at their best. One crucial task many homeowners overlook is flushing the tankless water heater.
If you neglect this important maintenance step, you could be setting yourself up for a range of problems—some costly, some damaging to the unit, and some that can even shorten the lifespan of your water heater. Here’s why flushing your tankless water heater matters and what can happen if you don’t keep up with it.
Why Flushing Your Tankless Water Heater Is Necessary
Over time, minerals—mainly calcium and magnesium—build up inside your tankless system. This is especially true in areas like Burleson, TX, where hard water is common. Even if you have a basic filter, small amounts of these minerals can pass through and settle inside the heating elements and internal components.
Flushing your tankless water heater removes this mineral buildup (also known as scale) and keeps your system running efficiently. Most manufacturers recommend flushing at least once per year, though homes with particularly hard water may need more frequent service.
What Happens if You Don’t Flush Your Tankless Water Heater?
Neglecting to flush your tankless water heater can lead to several serious issues that will eventually cost you time, money, and comfort. Here’s what you might experience:
1. Reduced Efficiency
As scale builds up inside the system, it coats the heating elements. This insulation layer forces your unit to work harder to heat the water, leading to longer wait times for hot water and increased energy usage. You might notice your utility bills slowly climbing even though your water habits haven’t changed.
2. Inconsistent Water Temperature
If your water heater struggles to heat water due to mineral buildup, you may experience fluctuating water temperatures. One moment your shower is scalding hot, and the next it’s lukewarm. This happens because the heating elements can’t transfer heat properly through the scale buildup.
3. Increased Risk of System Failure
The harder your tankless water heater has to work against the scale, the more strain it places on internal parts. Over time, this can lead to premature failure of key components, such as the heat exchanger, sensors, or valves. Replacing these parts can be costly—and sometimes it makes more financial sense to replace the entire unit.
4. Higher Repair and Replacement Costs
Without regular flushing, the lifespan of your tankless water heater can be cut in half. Instead of lasting 15–20 years as expected, your system may fail in less than 8–10 years. A complete replacement is far more expensive than the cost of annual flushing maintenance.
5. Voided Manufacturer’s Warranty
Many manufacturers require proof of regular maintenance—including flushing—if you ever file a warranty claim. If your system develops problems and you haven’t kept up with the recommended maintenance schedule, you may be responsible for 100% of the repair or replacement costs.
6. Poor Water Quality
Over time, scale buildup can also break loose and flow into your faucets and showerheads. This can cause cloudy or gritty water, reduce water pressure, and increase wear and tear on your plumbing fixtures.
How Flushing Protects Your Investment
Flushing your tankless water heater doesn’t just prevent problems—it extends the life of your unit, improves performance, keeps your energy costs down, and protects your warranty.
During a flushing service, a professional plumber will:
-
Shut down the system and disconnect it safely
-
Use a special pump to circulate a descaling solution through the system
-
Remove accumulated mineral deposits
-
Inspect key components for signs of wear or damage
-
Reassemble and restart the system to ensure everything is working correctly
In about one to two hours, your water heater is cleaned, inspected, and restored to peak performance.
When Should You Schedule Flushing?
Ideally, your tankless water heater should be flushed once a year. However, if you live in an area with hard water or you notice signs of buildup—like longer waits for hot water, inconsistent temperatures, or reduced water pressure—you might need service more frequently.
If you have a water softener installed, you may be able to extend the time between flushes slightly, but regular maintenance is still important.
Trust Superior Plumbing for Tankless Water Heater Maintenance
Your tankless water heater is a major investment, and keeping it in top condition is essential for getting the most value from it. Don’t let poor maintenance lead to water heater repair or replacement.
If it’s been more than a year since your last tankless water heater flush, or if you’re seeing signs of trouble, Superior Plumbing in Burleson, TX is here to help. Our experienced team offers professional maintenance services to keep your unit running efficiently and extend its lifespan.
Contact Superior Plumbing today to schedule a tankless water heater flushing service and protect your home’s comfort, efficiency, and plumbing system for years to come!
