Installed right for hard water. Serviced by people who know the units.
Tankless Water Heaters & Service in Mesa, AZ
Endless hot water only stays endless if the unit is sized, vented and protected properly — and flushed before scale takes it down. Camcor Plumbing installs and services Navien and Rinnai tankless water heaters across Mesa and the East Valley, and gives you a straight answer on whether tankless is even the right call for your home.
Tankless Water Heaters, Done For East Valley Water
Tankless water heaters heat water on demand instead of keeping a tank hot all day, which is why so many Mesa homeowners ask about them. The catch is that a tankless unit pushes every gallon through a narrow heat exchanger, and East Valley water is very hard. Without pre-treatment and a regular flush, scale builds inside that exchanger, flow drops, the unit throws error codes, and a system that should have lasted years ends up on the service call list early.
That's why every tankless install we do starts with the water, not the heater. We look at your household's hot-water habits, the gas supply available to the unit, where it can be vented safely, and what pre-treatment — a softener or a scale inhibitor — makes sense for the house. Tankless units are sensitive to all three: an undersized gas line starves the burner, bad venting is a safety problem, and untreated hard water quietly shortens the life of the exchanger.
We install and service Navien and Rinnai tankless water heaters, and we're honest about when tankless isn't the right answer. A small household, a home where running a larger gas line would be expensive, or a family that mostly uses hot water in long steady stretches may be better off with a high-efficiency tank — and we install those too. Our job is to recommend the system that fits your home, not the one with the biggest ticket.
For homes that already have a tankless unit, we handle the ongoing care: descaling flushes, filter cleaning, combustion checks, error-code diagnosis and repairs. Repair comes first when a repair will hold. If you've been told your tankless needs replacing because it's throwing a code, it's worth a second look before you spend that money.
Factory-trained
Navien Service Specialist certified
Camcor is a Navien Service Specialist (NSS) — factory-trained to install, service and warranty-support Navien tankless water heaters.
Units we install & service
What we handle
Tankless Water Heater Services
New Tankless Installation & Tank Conversion
Navien and Rinnai tankless units sized for your household and installed with the gas line, venting and pre-treatment they need. We also convert tank homes to tankless when the numbers and the house make sense.
- Navien & Rinnai installs
- Tank-to-tankless conversion
- Gas-line sizing & venting
- Isolation valves for future flushes
- Recirculation options
Descaling Flush & Annual Maintenance
Hard water leaves scale inside the heat exchanger. A proper descaling flush — typically annually in hard-water homes — keeps flow and output where they should be and heads off the error codes scale causes.
- Descaling flush with pump & solution
- Inlet filter cleaning
- Combustion & vent check
- Flow & temperature test
- Pre-treatment review
Repair & Error-Code Diagnosis
Flashing codes, lukewarm water, short cycling, ignition failures and flow problems. We read the code, find the actual fault and repair it — scale, sensor, igniter or valve.
- Error-code diagnosis
- Igniter, flame & flow sensor repairs
- Scale-related fault correction
- Gas valve & venting issues
- Repair-first, replace only when warranted
Navien & Rinnai Service
We install and service both brands regularly and know how they behave on East Valley water. Factory-trained Navien service, with the right parts for the unit on your wall.
- Navien Service Specialist (NSS) certified
- Rinnai installation & service
- Manufacturer parts
- Recirculation tuning
- Honest replace-vs-repair advice
How it works
Our Tankless Water Heater Process
Hot-Water Walkthrough
How many bathrooms, who showers when, what else runs at the same time — we build the sizing around how your household actually uses hot water.
Gas, Venting & Water Check
We confirm the gas supply can feed a tankless burner, find a safe vent path, and look at how hard your water is and what pre-treatment the unit will need.
Straight Recommendation
Tankless or tank, which model, what pre-treatment, and what it costs — in writing. Estimates are free on most planned work; diagnostic evaluations may carry a charge.
Install or Repair
New units are mounted, piped, vented and gas-connected to code with the pre-treatment in place. Repairs use the right manufacturer parts for the unit.
Test, Set Up & Maintenance Plan
We test flow, temperature and combustion, show you the isolation valves and filter, and leave you with a realistic flush schedule for hard-water homes.
Safety First
- OSHA-compliant safety procedures
- Licensed and insured team
- Proper protective equipment
- Dust control systems
- Structural integrity protection
Eco-Friendly Disposal
- Material recycling programs
- Donation of reusable items
- Responsible waste disposal
- Environmental compliance
- Minimal landfill impact
FAQ
Tankless Water Heater FAQ
The questions Mesa homeowners actually ask us about tankless
It can be, as long as it's protected. East Valley water is very hard, and scale is what kills tankless units early. With a softener or scale inhibitor ahead of the unit and a regular descaling flush, a tankless system holds up well here. Without those, we'd steer you toward a tank.
In hard-water homes like ours, typically annually. A descaling flush pushes a cleaning solution through the heat exchanger to dissolve the scale that builds up. Skipping it is the most common reason we see flow drop, temperatures swing and error codes appear.
Often, yes. The two things that decide it are gas supply and venting. A tankless burner needs more gas than a tank, so the existing line may need to be upsized, and the unit vents differently. We check both before quoting so there are no surprises mid-install.
Yes — we install and service both. Camcor is Navien Service Specialist (NSS) certified, and we work on Rinnai units regularly. We'll recommend the model that fits your household and your water, not whichever one we happen to have on the truck.
Usually not. Most codes point to a specific, repairable cause — scale in the exchanger, a dirty inlet filter, a flow sensor, an ignition issue or a venting problem. We diagnose the actual fault first. Replacement is on the table only when the unit is genuinely past saving.
That "cold water sandwich" and other temperature swings are usually a flow or scale issue — the unit can't keep up or is cycling on and off. A descaling flush, a filter cleaning or a recirculation adjustment typically resolves it. If it's a sizing problem, we'll tell you that honestly.
No. Tankless is excellent for households that use a lot of hot water in bursts and have the gas capacity for it. For a small household, or a home where upsizing the gas line would be costly, a high-efficiency tank is often the smarter call. We install both and we'll give you the real tradeoffs.
Estimates are free on most planned work, including new tankless installs and conversions. Diagnostic evaluations on a unit that's acting up may carry a charge, and we tell you before we start. No "today-only" pricing either way.
Still stumped? Easier to just call. Real plumber, no phone tree: (480) 626-4272
Related services
Other plumbing services we handle.
Tankless Water Heaters & Service — coverage
Tankless Water Heaters & Service in cities across the metro.
READY FOR YOUR TANKLESS WATER HEATERS & SERVICE?
Estimates are free on most planned tankless water heaters & service work; diagnostic evaluations may carry a charge. Fast, safe and professional service.
Mon–Sat • Same-day when available