09/04/2026
🔥 4 years. No descaling. A lot of lost efficiency.
That’s what we found on a tankless water heater this week.
The unit still looked fine on the outside. Inside, mineral scale had coated the heat exchanger. It was working harder, using more energy, and not delivering the hot water performance the homeowner paid for.
That’s how scale works. It doesn’t usually fail overnight. It slowly:
💧 Cuts heating efficiency
💧 Restricts flow through those tight passages
💧 Makes the unit run hotter and longer
💧 Shortens the life of a system that should last 15–20+ years
Most tankless heaters need a professional descale once a year — more often if you have hard water.
A yearly flush is cheap insurance compared to higher energy bills, weaker showers, error codes, or a heat exchanger that dies early.
Tommy’s ProTech Plumbing, LLC services tankless water heaters for homes and businesses in Rapid City and the surrounding area. We’ll flush the scale, restore efficiency, and tell you straight what the unit needs.
📞 Call or text: (605) 981-0200
🌐 tommysprotechplumbingllc.com
📍 Rapid City, SD
When was the last time your tankless was descaled? Message us and we’ll get you on the schedule.