How Much Does it Cost to Flush a Water Heater?

Why a Simple Water Heater Flush Can Save You From Bigger Repair Bills

A water heater flush is a routine maintenance service that removes sediment buildup from the bottom of the tank. In Fredericksburg and across the Texas Hill Country, mineral-heavy water makes this service especially important. Over time, sediment can reduce efficiency, cause popping or rumbling noises, shorten the lifespan of the water heater, and even lead to overheating or tank failure.

For most standard tank-style water heaters, homeowners can expect flushing costs to fall in the $150–$300 range. The price may be on the higher end if the tank hasn’t been serviced in years, shows signs of heavy buildup, or requires additional inspection of components like the anode rod or drain valve. Tankless water heaters often require a specialized descaling process, which can also affect pricing.

At 72 Degrees Air Conditioning, Heating, and Plumbing, water heater flushing is part of proactive care—helping Hill Country homeowners protect their hot water supply, improve efficiency, and avoid unexpected breakdowns. Regular flushing is especially valuable for older systems and homes on hard water, where buildup happens faster than many homeowners realize. Learn more about our professional water heater services and how routine maintenance can extend the life of your system.