Standard price before discounts: 20% military, 15% ZPP, 10% senior. One discount per visit. Current offers.
Upgrade to reliable, energy-efficient hot water that never runs out.
Zest Plumbing & Drain provides professional tankless water heater installation and repair, helping homeowners switch from outdated tank systems to modern, on-demand performance.
Whether you're installing a new tankless unit, replacing an old one, or repairing an existing system, our licensed plumbers handle the entire process correctly, from gas sizing and venting to startup and performance testing.
When it’s done right, tankless delivers unmatched convenience and efficiency. When it’s done wrong, it causes headaches.
We do it right.
Tankless water heaters heat water only when you need it. No stored tank. No running out during back-to-back showers.
For larger households in Scottsdale, tankless eliminates the frustration of running out of hot water during peak use.
Tankless installation is not a simple swap.
Most homes require:
We evaluate your home’s layout, water demand, and fuel supply before recommending a system.
Then we install it to manufacturer specifications and test everything thoroughly before we leave.
No shortcuts. No undersized units. No performance issues later.
Switching from a traditional tank water heater to tankless is a major upgrade.
We handle:
We’ll walk you through what to expect, including any modifications required, so there are no surprises.
Tankless systems are advanced. When something goes wrong, you need someone who understands them.
We repair:
If your tankless unit isn’t performing correctly, we diagnose the actual issue, not just clear the code and leave.
Scottsdale’s hard water is no joke.
Tankless systems are especially sensitive to mineral buildup. Without proper maintenance, scale can:
We strongly recommend routine flushing and descaling to protect your investment.
If your system hasn’t been serviced in over a year, it’s time.
We price every installation upfront at a flat rate, with no trip charge and no surprise fees. A tankless system is a bigger investment than a standard tank, but it lasts longer, saves space, and delivers unlimited hot water. A standard tankless installation in Scottsdale typically runs $6,495, with the final price depending on your home's gas and venting setup, the unit size your household needs, and whether any existing lines require upgrading. Jobs that need a longer gas run, added venting, or a larger-capacity unit will run higher.
You get the full price before any work begins, and we will walk you through exactly what your specific installation requires.
Annual maintenance with our Zest Protection Plan keeps tankless systems running efficiently and protects the heat exchanger.
Our tankless maintenance service includes:
Proper maintenance isn’t optional in hard water areas like Scottsdale, it’s necessary.
Tankless systems last longer than traditional tanks, but they don’t last forever.
If your unit is:
Replacement may be smarter than repeated repairs.
We’ll give you an honest assessment based on cost and long-term value.
We’ve been serving Scottsdale homeowners since 2008.
Tankless installation and repair isn’t general plumbing work, it requires experience and proper sizing knowledge.
Homeowners choose us because:
We don’t oversell oversized units.
We don’t undersize systems to save time.
We install it the way it’s supposed to be done.
If you’re considering tankless water heaters in Scottsdale, or your current system needs repair, call Zest Plumbing & Drain today.
We’ll help you make the right decision for your home, and install it properly the first time.
With proper maintenance, tankless water heaters typically last 15 to 20 years, and in some cases longer. That is roughly twice the lifespan of a traditional tank water heater. The key variable in Scottsdale is hard water management. At 16 to 20 grains per gallon, Scottsdale's water supply deposits mineral scale inside the heat exchanger over time. Without annual descaling, that buildup reduces efficiency, triggers error codes, and can damage the heat exchanger permanently, cutting the system's lifespan well short of its potential. Tankless systems that are flushed and inspected annually consistently reach the higher end of their expected lifespan.
Yes, and in Scottsdale the maintenance requirement is more critical than in most parts of the country. Scottsdale's water hardness averages 16 to 20 grains per gallon, which is well into the very hard category. Tankless systems are particularly sensitive to mineral scale because water flows through narrow heat exchanger passages under high pressure. Scale builds up in those passages, reducing water flow, lowering efficiency, and eventually triggering error codes or heat exchanger failure. Annual flushing and descaling removes that buildup before it causes damage. If your tankless system has not been serviced in over a year, it is worth scheduling a maintenance visit before the next hot season.
Yes, and it is one of the most common upgrades we do for Scottsdale homeowners. The process is more involved than a simple swap, though. Most homes require gas line resizing to handle the higher BTU demand of a tankless unit, updated venting to meet current code requirements, and sometimes electrical upgrades depending on the unit. High-efficiency condensing units also require condensate drainage that older tank installations did not need. We evaluate your home's existing gas supply, venting configuration, and water demand before recommending a system so there are no surprises on installation day. There is no trip charge for the evaluation, and we provide upfront pricing before any work begins.
A standard Navien tankless installation in Scottsdale runs $6,495 at Zest Plumbing & Drain. That is a flat-rate, all-inclusive price. The final number can change if your home needs gas line upsizing, new venting, or additional plumbing connections, and converting from a tank system is more involved than replacing an existing tankless unit. Tankless repairs run $350 to $950, with a $179 diagnostic charge only when needed to isolate the failure. You get the full price before any work begins, and there is no trip charge.
Tankless sizing is based on two factors: the number of fixtures you expect to run simultaneously and the temperature rise required to reach your target hot water temperature from Scottsdale's incoming groundwater temperature. Scottsdale's incoming water typically ranges from around 65 degrees in winter to 85 degrees in summer, which affects how hard the unit has to work. A household running two showers at the same time needs a meaningfully larger unit than one with single-point demand. Undersized tankless units produce hot water that turns cold under load, which is one of the most common complaints after DIY or improperly evaluated installations. We size units to your home's actual demand, not a generic recommendation.
No. Zest Plumbing & Drain does not charge a trip fee, dispatch fee, or fuel surcharge to come to your home. Whether you need a routine repair diagnosis, a maintenance visit, or an estimate for a new installation, there is no charge just for showing up. If in depth diagnosis is needed to repair your tankless water heater, there may be a diagnostic charge, your plumber will let you know before he proceeds and upfront pricing will be provided before any work begins so you know exactly what you are agreeing to. This has been our approach since 2008 and it is one of the main reasons Scottsdale homeowners call us before the corporate and private equity-backed companies that do charge those fees.
