Maximize Unit Lifespan and Restore Efficiency Against Utah’s Hard Water.
Tankless water heaters are powerful and energy-efficient—but they require specific care to stay that way. Mineral buildup can clog your system, reduce water pressure, and lead to breakdown. Slate Plumbing Co. specializes in professional tankless water heater maintenance and descaling throughout the Wasatch Front.
Homeowners along the Wasatch Front, stretching from Salt Lake City down through Lehi and Provo, deal with some of the hardest water in the United States. Mineral levels here frequently range from 12 to over 22 grains per gallon (gpg). This extreme calcium and magnesium loading makes regular descaling absolutely critical for municipal water and well water users alike.
Unlike traditional tanks that store large volumes of water, tankless heaters rely on a high-temperature heat exchanger with ultra-precise water pathways. As hard water flashes into instant steam or hot water, dissolved solids drop out of solution immediately, binding to the inner walls of the copper or stainless steel coils.
Over time, this thin mineral glaze solidifies into a rock-hard scale barrier that acts like an insulator. The system is forced to work harder, running hotter, using more thermal energy, and eventually triggering internal safety cutoffs or crack damage.
If you aren't currently using a whole-home sediment filter or water softener, your tankless unit is absorbing that heavy mineral load every single day.
Ideally, you should schedule maintenance before you notice operational problems. However, if you see any of these signs, your system likely has significant buildup and requires immediate attention.
Seeing a code like "LC" (Lime Cleaning) or System Overheat on your display panel is a direct request for service.
The water goes from hot to cold unexpectedly ("cold water sandwich") or struggles to reach the set temperature.
You notice lower pressure from the hot side of the faucet compared to the cold side due to internal clogging.
Rumbling, popping, or whining sounds coming from the unit while it heats indicates mineral deposits boiling.
If it has been more than 12 months since your last flush, it is time to book. Regular maintenance prevents the damage before it starts.
If your system needs replacement services, please view our Water Heater Installation services.
Learn About Professional Water Heater InstallationWe don't just rinse the unit; we perform a comprehensive cleaning protocol designed to restore your heater to factory performance levels.
We check your unit for recent error history and verify proper gas and water pressures before we begin.
We shut off gas and water supply and connect our professional flushing kit to the isolation service valves.
We pump a food-grade descaling agent through the heat exchanger for 45-60 minutes to safely dissolve mineral deposits.
We remove, clean, and reinstall the inlet debris filters to ensure maximum flow and catch sediment.
We flush with fresh water, restart the system, and test the hot water output for stable temperature.
Standard maintenance requires a dedicated valve kit to bypass your home's plumbing. If your unit was installed without these, our technicians can perform a professional valve installation during your service call to ensure your system is serviceable for years to come.
Call us or fill out our online form to request maintenance.
We provide a convenient arrival window and notify you when en route.
Our licensed technician performs the flush and inspection (60–90 mins).
We test the system, clean up, and provide a clear bill with no hidden fees.
Prefer to talk now? Call 801-515-0672
While annual flushing is essential, the best way to protect your tankless investment is to stop scale before it enters the unit. A whole-home sediment filter or softener removes the calcium and magnesium from your water supply entirely.
Homes with a water softener may only need maintenance every 2–3 years. We can discuss treatment upgrades that complement your tankless maintenance plan.
Ask About Protection Options
A standard descaling service takes about 60 to 90 minutes.
Cost is lower if valves are present. Installing new valves adds to the initial visit cost.
Heavy buildup from years of neglect may require a longer descaling process.
We service all major brands including Rinnai, Navien, Rheem, and Noritz.
We believe in straightforward answers. We provide a clear scope and estimate before any work begins, so you are never left guessing.
Request EstimateNo hidden fees. Satisfaction guaranteed.
Trusted by homeowners across Salt Lake County and Utah County for specialized tankless water heater care.
Still have questions? Call 801-515-0672
Don't let hard water shorten the life of your system. Schedule your tankless water heater maintenance visit with Slate Plumbing Co. today to keep performance high and protect your investment.
Prefer to talk now? Call 801-515-0672
Licensed pros • Clean workspace • Clear billing
