Scale can accumulate
Mineral buildup can develop over time inside the water circuit.
Why Tankless Water Heater Flushing Matters
Routine flushing helps keep mineral buildup in check and makes it easier to stay on top of tankless maintenance.
A Common Maintenance Baseline—Not a Universal Rule
Yearly service is a common baseline for many homeowners. Some units or water conditions may call for a different interval.
Customers should follow the owner manual and manufacturer recommendations for their specific unit. FlowSure does not determine or guarantee warranty eligibility.
Flushing helps address it
Circulating an appropriate solution through an eligible unit helps remove or reduce buildup.
Results vary
Unit age, model, water conditions, usage, and maintenance history affect the service result.
Careful Expectations Matter
Routine flushing is preventive maintenance. It does not guarantee energy savings, longer equipment life, future performance, or protection from every failure.
Manufacturer guidance varies by brand and model.
Water conditions and usage affect maintenance timing.
FlowSure is not manufacturer-authorized warranty service.
Ready for Your Next Step?
Tankless Flush Questions
Clear answers before you book or request a neighborhood service day.
How often should a tankless water heater be flushed?
Yearly service is a common maintenance baseline for many homeowners, but timing varies by manufacturer, model, water conditions, and usage. Follow the owner manual and manufacturer guidance for your unit.
Does flushing preserve my warranty?
Manufacturer requirements vary. FlowSure does not determine or guarantee warranty eligibility. Review the owner manual and warranty terms for your specific unit.
Do I need working service valves?
Yes. The unit needs accessible and functional hot- and cold-water isolation/service valves. FlowSure may decline or stop service when valves are missing, damaged, leaking, inaccessible, or unsafe to operate.
Does FlowSure perform repairs?
No. FlowSure provides qualifying preventive maintenance only. Work requiring repair, diagnosis, alteration, installation, gas work, a permit, or a contractor license should be referred to an appropriately licensed contractor.
How long does a standard flush take?
Appointment length varies with the unit, access, and service-valve setup. FlowSure may request photos before the appointment to help confirm eligibility.
Simple maintenance, clear next steps.
FlowSure focuses on straightforward preventive maintenance for eligible tankless water heaters. If your system needs repair or licensed trade work, we’ll point you toward the right type of help.
- Repair or replacement of valves or leaking plumbing connections
- Gas-line, gas-valve, venting, or electrical work
- Plumbing alterations or water-heater installation or replacement
- Installation of isolation or service valves
- Internal component repair or diagnostic disassembly
- Code-compliance reviews, certifications, or permit-required work
Ready for Routine Maintenance?
Simple preventive maintenance for eligible tankless water heaters. Repair or permit-required work is referred to an appropriately licensed contractor.
Book the $150 Flush
FlowSure provides preventive-maintenance services only and is not licensed by the California Contractors State License Board. Repairs, alterations, installations, gas work, and permit-required work are not offered.