Hendersonville, TN Rinnai Tankless Water Heater Flush
Flat-Rate $250 Service
Professional Rinnai descaling, hard-water scale removal, pressure improvement, and annual maintenance for Hendersonville homeowners. Local, specialized, and always flat-rate.
Proudly serving Glenbrook, Indian Lake, Mansker Farms, Saundersville, and all Hendersonville neighborhoods.
Why Rinnai Tankless Systems Need Annual Flushing in Hendersonville, TN
Hendersonville and the surrounding Sumner County area have naturally hard water. That means minerals like calcium and magnesium build up inside your Rinnai tankless system faster than they would in other regions. Over time, this hard-water scale reduces efficiency, slows hot-water delivery, and puts unnecessary strain on the heat exchanger.
Even if your tankless water heater seems to be working fine, internal scale buildup may already be forming. An annual professional flush removes this hidden buildup before it causes:
• Lower water pressure
• Longer wait times for hot water
• Higher energy usage
• System noise or vibration
• Premature wear on your Rinnai heat exchanger
A properly flushed Rinnai tankless water heater performs better, lasts longer, and delivers more consistent hot water — especially in Hendersonville’s hard-water conditions.
What’s Included in Your $250 Rinnai Tankless Flush
Your Rinnai tankless system is designed to last 20+ years, but only if it’s maintained correctly. Our flat-rate $250 flush includes a complete, professional descaling service using the right tools, the right flow rate, and the right process for Rinnai systems. No shortcuts. No upsells. Just premium care for your home’s most important appliance.
Here’s what’s included
• Full Rinnai Descale Flush
Complete circulation flush using a high-flow pump and professional-grade hoses designed for Rinnai tankless systems.
• Hard-Water Scale Removal
Breaks down mineral buildup inside the heat exchanger to restore performance and reduce wear.
• Inlet Filter Cleaning
Removes debris and sediment from the cold-water intake to improve pressure and flow consistency.
• System Inspection & Performance Check
Basic diagnostics to ensure proper burner function, flow rate, and temperature stability.
• Exterior Line & Valve Check
Quick review of shutoff valves, flex lines, and wall penetration points to confirm everything is functioning safely.
• Reset & Recalibration
A final system check after flushing to make sure your tankless heater is running efficiently.
Hard Water
Hard Water
Hendersonville’s Hard Water: What Homeowners Should Know
Hendersonville and much of Sumner County are situated on mineral-rich limestone, which naturally makes our water harder than that of most cities in Middle Tennessee. This mineral content isn’t harmful to drink, but it’s extremely tough on tankless systems — especially Rinnai units, which are designed to run at high efficiency.
Many Hendersonville homeowners notice:
• White mineral residue on faucets or shower glass
• Reduced water pressure compared to when the home was new
• Hot water is taking longer to reach fixtures
• A “rumbling” or “hissing” sound from their tankless system
These are all common signs of hard-water scale forming inside the heat exchanger.
Because of our region’s mineral levels, Hendersonville tankless systems typically need annual descaling, even in brand-new homes or neighborhoods with premium construction like Glenbrook, Mansker Farms, Indian Lake, and Saundersville.
A proper flush restores performance and protects your system from long-term damage caused by local hard-water conditions.
“Fast, reliable, and just great service. Ryan specializes in Rinnai units, and it shows. I’ll be scheduling this flush annually from now on.”
— Eric Chambers
“Night-and-day difference. Our water pressure improved immediately after the flush, and Ryan explained everything clearly. Professional, honest, and extremely knowledgeable about Rinnai systems.”
— Michael Rawlins
“I had no idea hard water affected tankless heaters this much. FlowTech showed up on time, worked clean, and my Rinnai has been running smoother and quieter ever since. Worth every penny.”
— Sarah Delaney
Why Hendersonville Homeowners Choose FlowTech
Tankless systems aren’t like traditional water heaters — and they shouldn’t be serviced like them. FlowTech focuses exclusively on Rinnai tankless maintenance, giving homeowners a specialist they can trust with one of the most important systems in their home.
Homeowners choose FlowTech because:
• Rinnai-Focused Specialist
Your system gets the correct descaling process, not guesswork.
• Flat-Rate $250 Pricing
No upsells. No surprises. No inflated service calls.
• Professional-Grade Equipment
High-flow pumps, proper hoses, and the right tools designed for Rinnai systems.
• Clean, On-Time, Respectful Service
Your home stays clean, the work is done efficiently, and communication is straightforward.
• Fully Insured
Peace of mind from start to finish.
• Local Hendersonville Technician
A local service provider who understands the area — and its hard-water conditions.
FlowTech delivers reliable, specialist-level care that keeps your Rinnai tankless heater running at peak performance year after year.
