Tankless Water Heater Flush & Ignitor Cleaning
Keep your tankless water heater running efficiently. We flush out mineral buildup and clean the ignitor to support reliable performance.
- $130 flat rate
- About 1 hour
What's Included
- Shut off and isolate the heater at its service valves
- Circulate a descaling solution through the heat exchanger to dissolve mineral scale
- Rinse the system with clean water
- Clean the ignitor to support reliable startup
- Restore water and gas, then confirm steady hot water at the tap
Why It Matters
Minerals in your water leave scale inside a tankless heater’s heat exchanger over time. As scale builds, water flow drops, the burner works harder and temperatures can swing. Regular maintenance helps maintain consistent hot water, reduce unnecessary wear, and extend the life of your system.
Most manufacturers recommend flushing a tankless water heater at least once a year, and many require regular maintenance to keep the warranty valid.
At a Glance
- Time on site: about 1 hour
- Category: Tankless Maintenance
- Flat-rate pricing, no surprises
- Serving Chapin, Irmo, Columbia, Lexington, Elgin and Newberry
From a Recent Job
Flushing an outdoor tankless water heater with a pump and bucket.
The burner and ignitor assembly, cleaned during the service.
Common Questions
How often should a tankless water heater be flushed?
Once a year is the standard recommendation for most homes. Homes with hard water or heavy hot water use may benefit from more frequent service.
Does my heater need service valves for a flush?
Yes. The flush connects to service valves on the hot and cold water lines. If your heater doesn't have them, we can install them on one or both sides before your first flush.
How long does the flush take?
Plan on about one hour for most systems.
Will I have hot water during the service?
Hot water is off while the system is flushed and comes back on as soon as the service is finished.
Related Services
Tankless flush, ignitor cleaning and a residential backflow test in one visit. Save $10 versus booking separately.
Replace the inlet filter to keep water flowing freely and stop debris before it reaches your heater.
Install service valves on one or both water lines so every future flush is faster and simpler.
What Customers Say
Real feedback from MS Flush customers, shared after their appointments through our booking system.
Ready to Book Your Service?
Choose a time online in a few clicks, or call Michal directly at (803) 422-7726. Flat-rate pricing, no surprises.