Tankless Water Heater Installation & Service in Phoenix, AZ
A Quality HVAC and Plumbing Services LLC provides licensed tankless water heater installation, repair, annual descaling, and emergency service throughout Phoenix, AZ, licensed under Arizona ROC 348651 (Specialty Dual CR-37 Plumbing), fully insured, and BBB A+ accredited. Our licensed plumbers install and service AO Smith and Bradford White tankless water heaters and are trained to address the specific descaling and maintenance requirements that Phoenix’s 13 to 17 grains-per-gallon hard water creates for on-demand systems. With 17,000-plus verified reviews on Google, Yelp, and HomeAdvisor and 30-plus years in the West Valley market, we bring documented local expertise to every tankless service call. All installations are permitted and inspected under City of Phoenix mechanical code requirements. Call 623-853-1482 any time for 24/7 Phoenix tankless water heater service.
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Why Phoenix Homeowners Are Choosing Tankless Water Heaters
Tankless water heaters have become the dominant upgrade path for Phoenix homeowners, replacing aging tank units for several reasons specific to this market. The combination of warm year-round groundwater temperatures, which reduces the temperature rise required and increases effective flow rates for correctly sized units, and Phoenix’s long daily hot water demand profile from large households makes the on-demand model particularly efficient here. The absence of a large standing water volume also reduces the total scale accumulation surface, which matters in Phoenix hard water conditions where the 13 to 17 grains-per-gallon mineral content creates maintenance demands that are more manageable on a heat exchanger than inside a 50-gallon tank.
The U.S. Department of Energy estimates that tankless water heaters are 24 to 34 percent more energy efficient than storage tank units for households using 41 gallons or less per day. For larger Phoenix households, the combination of avoided standby heat loss and on-demand heating efficiency typically produces a measurable reduction in water heating energy consumption compared to a tank unit of the same nominal capacity.
Service life is another compelling factor in the Phoenix market. Well-maintained tankless units achieve 15 to 20 year service lives, compared to the 8 to 12 year average for tank water heaters in Phoenix hard water conditions. Over the ownership period of most Phoenix homes, this longevity difference means one fewer full replacement cycle for homeowners who choose tankless and maintain it properly.
Our Tankless Water Heater Services in Phoenix, AZ
Tankless Water Heater Installation
Our installation process begins with a household flow demand calculation that accounts for your simultaneous hot water use scenarios and Phoenix’s groundwater temperature inputs. We assess your existing gas line capacity, venting route options, electrical service for control systems, and available installation space before specifying equipment. All installations are performed under permit with City of Phoenix inspection coordination. Every installation is backed by our lifetime workmanship guarantee plus the manufacturer’s product warranty, and we register the manufacturer’s warranty on your behalf at installation.
For a complete overview of our water heater services beyond tankless, see our main water heater services.
Tankless Water Heater Repair
Tankless water heater repair in Phoenix most commonly involves mineral scale clearing from flow sensors and heat exchanger passages, igniter and combustion assembly service, error code diagnosis using manufacturer-specific tools, temperature sensor and flow regulator replacement, venting inspection for blockage or combustion spillage, and control board diagnosis. Our plumbers carry repair parts for AO Smith and Bradford White systems and maintain cross-brand parts inventories for Rinnai, Navien, Rheem, and other systems commonly found in the Greater Phoenix market.
Annual Descaling and Maintenance
Annual professional descaling is the single most important service for Phoenix tankless water heaters. The process involves connecting a descaling pump and reservoir to the unit’s service ports, circulating a food-grade citric acid or commercial descaling solution through the heat exchanger for 45 to 60 minutes, flushing the circuit with clean water, and verifying post-service flow rate and temperature output. Our technicians also inspect the inlet filter screen, test the pressure relief valve, verify combustion performance for gas units, and document service for warranty compliance purposes.
For homes with significant hard water exposure, we also evaluate whether a whole-home water softener would extend descaling intervals and protect the heat exchanger from the rate of scale accumulation that Phoenix tap water produces.
Tankless Water Heater Replacement
When a Phoenix tankless unit has reached the end of its service life or sustained a heat exchanger failure, our plumbers manage the full replacement process including refrigerant recovery where applicable, removal and disposal of the old unit, new unit installation under permit, and commissioning. We provide an honest assessment of repair versus replacement based on unit age, maintenance history, and the specific failure type before recommending replacement. Heat exchanger failure in a unit over 15 years old in Phoenix hard water conditions typically represents the replacement threshold.
Gas Line Sizing and Upgrade
Tankless water heaters require substantially higher BTU input than tank units, and many Phoenix homes with gas tank heaters have gas lines sized for 35,000 to 45,000 BTU service rather than the 150,000 to 200,000 BTU demand of a residential tankless unit. Gas line undersizing causes the unit to receive insufficient pressure under full firing load, reducing temperature output and triggering error codes. Our plumbers assess your gas line diameter, length, and pressure drop from the meter to the unit location before installation to identify whether gas line modification is required.
Phoenix Hard Water and Your Tankless Water Heater
Phoenix’s water supply from the Colorado River through the Central Arizona Project and from local groundwater aquifers delivers water at 13 to 17 grains per gallon hardness throughout the metro area. The Water Quality Association classifies water above 10.5 gpg as very hard. At 13 to 17 gpg, Phoenix water is well into the very hard to extremely hard range that manufacturers designate as requiring specific installation and maintenance provisions for tankless water heaters.
Inside a tankless heat exchanger, hot water temperatures cause dissolved calcium and magnesium to precipitate onto heat exchanger surfaces at a rate proportional to water hardness. The U.S. Department of Energy’s water heating guidance states that a quarter inch of mineral scale on a heat exchanger surface can reduce thermal efficiency by up to 40 percent. At Phoenix water hardness levels, a tankless unit operating without annual descaling can accumulate this level of scale within two to three years of installation.
The practical consequences of unchecked scale accumulation in a Phoenix tankless unit progress in stages: first reduced efficiency and longer heating times, then partial flow sensor blockage and error codes, then, temperature instability under simultaneous demand, and finally, heat exchanger failure from sustained thermal stress on insulated surfaces. Annual professional descaling interrupts this progression at the earliest stage and prevents it from advancing to costly repair or premature replacement.
Gas vs. Electric Tankless for Phoenix Homes
Gas tankless water heaters provide heating rates of 150,000 to 200,000 BTU that allow a single unit to serve whole-home hot water demand for most Phoenix households, including simultaneous multi-fixture use scenarios. Gas units require proper gas line sizing, dedicated Category III or IV venting, and periodic combustion assembly inspection. For Phoenix homes already plumbed for gas, upgrading from a gas tank to a gas tankless unit typically requires gas line resizing but is otherwise straightforward from an infrastructure standpoint.
Electric tankless units have lower installation costs where gas service is absent. Standard electric resistance tankless units require high-amperage dedicated circuits and often panel upgrades to supply the 150 to 200 amp draw of whole-home units. Heat pump water heaters represent the most energy-efficient electric option, using ambient air heat rather than resistance heating, and qualify for federal tax credits under current IRS guidelines. For Phoenix homes without gas service, heat pump water heaters are generally the most economical long-term electric water heating solution.
Tankless Water Heater Brands We Install in Phoenix
A Quality HVAC and Plumbing Services LLC installs AO Smith and Bradford White tankless water heater systems for Phoenix homeowners. Both manufacturers have documented performance histories in Arizona’s hard water market, offer model configurations appropriate for the full range of Phoenix residential applications, and provide comprehensive warranty programs that address hard water region maintenance requirements. Our plumbers receive ongoing manufacturer training on both brands and carry complete installation and descaling parts inventories on service vehicles.
For service on tankless units of other brands already installed in Phoenix homes, including Rinnai, Navien, Rheem, Noritz, Ecosmart, and others, our plumbers perform diagnosis and repair using manufacturer-specific diagnostic equipment and OEM-compatible service parts.
City of Phoenix Permit Requirements for Tankless Water Heaters
The City of Phoenix requires a mechanical permit for tankless water heater installation and replacement. The City of Phoenix Building Safety Division administers the permit process, which requires: permit application submission with equipment specifications, inspection of the completed installation by a licensed City of Phoenix building inspector, and verification of compliance with current Arizona Plumbing Code requirements covering gas connections, venting, electrical, water connections, pressure relief valve discharge piping, and seismic strapping.
Our licensed plumbers manage the permit application and inspection scheduling process as a standard component of every Phoenix tankless water heater installation. Permit fees are disclosed at the estimate time and are not hidden in the final invoice. Unpermitted tankless installations create complications with homeowners’ insurance claims, property sales, and future service liability that are costly to resolve after the fact.
Our Tankless Water Heater Installation Process in Phoenix
- Pre-installation consultation: We visit your home to calculate household flow demand, assess gas line capacity, evaluate venting route options, inspect the installation space, and identify any prerequisite work such as gas line modification.
- Permit acquisition: We submit the mechanical permit application to the appropriate municipal building department before work begins. We manage all communication with the permit office.
- Old unit removal: The existing water heater is disconnected, drained, and removed. For gas units, refrigerant is not applicable, but gas supply is capped safely before removal. Old units are disposed of responsibly.
- New unit installation: The tankless unit is mounted, gas or electrical connections are made, venting is installed per manufacturer and code requirements, and water supply connections are completed with appropriate isolation valves.
- Commissioning and testing: The unit is started, burner operation and temperature output are verified, flow rate is confirmed at multiple fixtures, and error code memory is checked for any startup anomalies.
- City inspection: We coordinate the building inspector visit and are present for the inspection to address any questions or corrections on the spot.
- Documentation and orientation: You receive the permit documents, installation documentation, warranty registration confirmation, and a written maintenance schedule calibrated to Phoenix hard water conditions.
Why Phoenix Homeowners Choose A Quality for Tankless Water Heater Service
| What We Offer | What It Means for You |
| Licensed: Arizona ROC 348651 (CR-37 Plumbing) | Active specialty plumbing license verified through the Arizona Registrar of Contractors. Required for all water heater installation and repair in Arizona. |
| Fully Insured (GL + Workers Comp) | General liability and workers compensation protect your Phoenix property and our plumbers on every water heater service call. |
| BBB A+ Accredited | Three decades of documented customer satisfaction reflected in the Better Business Bureau’s highest accreditation rating. |
| AO Smith and Bradford White Specialists | Manufacturer-trained on both brands. Full parts inventories on service vehicles for fast repair and same-visit descaling service. |
| Phoenix Hard Water Expertise | Our plumbers calibrate every maintenance recommendation to Maricopa County’s 13 to 17 gpg water conditions, not national averages. |
| 17,000+ Verified Reviews | Documented on Google, Yelp, and HomeAdvisor from real Phoenix-area homeowners who trusted A Quality with their water heater service. |
| Lifetime Installation Guarantee | Every assembly our plumbers complete carries a lifetime workmanship guarantee. If it comes apart, we correct it at no cost. |
| 24/7 Emergency Service | No hot water in Phoenix is an emergency. Live dispatch is available at all hours for urgent tankless water heater calls. |
Frequently Asked Questions About Tankless Water Heaters in Phoenix, AZ
How does a tankless water heater work differently from a tank unit?
A tank water heater stores a fixed volume of water, typically 30 to 80 gallons, and maintains it at the set temperature continuously, incurring standby heat loss around the clock. A tankless water heater has no storage tank. When a fixture calls for hot water, cold water flows through a heat exchanger and is instantly heated to the setpoint temperature by a gas burner or electric heating element, then delivered directly to the fixture. The result is unlimited on-demand hot water with no standby energy loss and no recovery period.
Is a tankless water heater a good investment for a Phoenix home?
Yes, for most Phoenix homeowners. The combination of Phoenix’s 13 to 17 grains-per-gallon hard water, year-round warm temperatures that keep groundwater temperatures elevated, and the high household hot water demand of a large family makes tankless particularly well-suited to this market. The absence of a large standing water volume reduces the total scale accumulation surface compared to a tank unit. With annual professional descaling, tankless units in Phoenix achieve service lives of 15 to 20 years, significantly longer than the 8 to 12 year average for tank units in this hard water market.
How does Phoenix hard water affect a tankless water heater?
Phoenix water sourced from the Colorado River through the Central Arizona Project measures 13 to 17 grains per gallon in hardness, placing it in the Water Quality Association’s very hard to extremely hard category. When this water passes through a tankless heat exchanger at high temperatures, calcium and magnesium minerals precipitate and deposit as scale on the heat exchanger surfaces. The U.S. Department of Energy documents that a quarter inch of scale on a heat exchanger can reduce thermal efficiency by up to 40 percent. Without annual professional descaling, Phoenix tankless units can develop measurable flow restriction and efficiency loss within two to three years of installation.
How often should I have my tankless water heater descaled in Phoenix?
Annual descaling is non-negotiable for tankless water heaters in Phoenix and throughout Greater Maricopa County. The national recommendation of every one to three years is calibrated for national average water hardness and does not apply to Phoenix conditions. Phoenix’s 13 to 17 gpg water hardness causes scale accumulation at a rate that demands annual treatment to prevent the heat exchanger efficiency loss and flow restriction that progresses to costly component failure. Households paired with a functioning whole-home water softener may extend this interval after confirming water softener performance through a water hardness test.
What happens if I skip annual descaling in Phoenix?
Without annual descaling in Phoenix hard water, calcium carbonate scale progressively coats the heat exchanger surfaces. Efficiency drops measurably within two years, requiring the unit to run longer and consume more fuel to achieve the same hot water output. Flow sensors become partially blocked, triggering error codes. The heat exchanger operates at higher temperatures to compensate for insulated surfaces, accelerating thermal stress on components. Within four to six years of skipped maintenance in Phoenix hard water conditions, premature heat exchanger failure is a common outcome, typically requiring unit replacement rather than repair.
What brands of tankless water heaters does A Quality install in Phoenix?
A Quality HVAC and Plumbing Services LLC installs AO Smith and Bradford White tankless water heaters for Phoenix-area homeowners. Both manufacturers produce residential and commercial tankless lines with proven performance records in Arizona’s hard water environment and comprehensive warranty programs that include specific hard water region requirements. Our plumbers are manufacturer-trained on both brands and maintain service and descaling parts inventories for both on our service vehicles.
Is gas or electric tankless better for a Phoenix home?
Gas tankless water heaters provide faster heating rates, larger flow capacity for whole-home applications, and typically lower operating costs in Arizona given historical natural gas rate comparisons. Electric tankless units have lower installation costs where gas lines are absent and no venting requirements. Heat pump water heaters, which are a distinct electric category, offer dramatically better efficiency than standard electric resistance tankless units and are eligible for federal tax credits under current IRS guidelines. Our plumbers evaluate your existing gas or electric infrastructure, household flow demand, and budget to recommend the appropriate technology for your specific Phoenix home.
What size tankless water heater do I need for my Phoenix home?
Tankless water heater sizing is based on two factors: the maximum simultaneous flow rate your household demands in gallons per minute, and the required temperature rise from incoming groundwater temperature to the desired hot water setpoint. Phoenix groundwater temperatures are elevated year-round due to the local climate, which actually reduces the required temperature rise and allows smaller BTU units to achieve setpoints more easily than in colder regions. Our plumbers calculate your household’s simultaneous demand scenario and recommend the unit size that meets peak demand without over-specification.
Does Phoenix require a permit for tankless water heater installation?
Yes. The City of Phoenix and most Maricopa County municipalities require a mechanical permit for tankless water heater installation and replacement. The permit process requires application submission and a post-installation inspection by a licensed building inspector to verify compliance with current plumbing code requirements including venting, gas connections, expansion tank installation, and seismic strapping where required. Our licensed plumbers manage permit acquisition and inspection coordination as a standard part of every tankless installation. Unpermitted installations create complications with homeowner insurance claims and property transactions.
How long does a tankless water heater installation take in Phoenix?
A direct replacement of an existing tankless unit typically takes 2 to 4 hours. Replacing a tank water heater with a tankless unit, which requires gas line resizing, dedicated venting installation, and often electrical work for the control systems, typically takes 4 to 8 hours. Installations that require gas line extension to the installation location or significant ductwork modification may require a separate preliminary visit. Our plumbers provide a realistic time estimate and pre-installation requirements list before the installation appointment.
Can a tankless water heater handle multiple simultaneous hot water uses in Phoenix?
Yes, when correctly sized for the household’s peak simultaneous demand. Simultaneous hot water demand in a typical Phoenix home during morning hours might include two showers, a dishwasher, and a laundry machine running concurrently. Our plumbers calculate the peak simultaneous flow rate for your household and select a unit whose rated capacity at Phoenix groundwater temperatures meets that demand without reduction in delivered temperature. Undersized tankless units will modulate output temperature under high simultaneous demand, which is the most common performance complaint following DIY or incorrect-size installations.
How long does a tankless water heater last in Phoenix with proper maintenance?
Properly maintained tankless water heaters in Phoenix achieve service lives of 15 to 20 years, which is substantially longer than the 8 to 12 year average for tank units in this hard water market. The key determinant of longevity in Phoenix is annual professional descaling to prevent heat exchanger scale accumulation. Many major tankless manufacturers also require documented proof of annual maintenance in their warranty terms for units installed in known hard water regions. Our technicians maintain service records that can support warranty claims if needed.
What is the flow rate I need to specify for a Phoenix tankless water heater?
Flow rate specification should reflect your household’s peak simultaneous demand scenario. A single-shower household may need 2.0 to 2.5 gallons per minute. A household running two showers simultaneously needs 4.0 to 5.0 gallons per minute. Adding a dishwasher to concurrent usage typically adds another 1.0 to 1.5 gallons per minute. Our plumbers calculate the peak flow scenario for your specific household before recommending a unit, and we specify units rated for Phoenix’s incoming groundwater temperature to ensure published flow rates are achievable under actual operating conditions.
What is the difference between condensing and non-condensing tankless water heaters?
Non-condensing tankless units exhaust flue gases at high temperatures, 300 to 500 degrees Fahrenheit, which requires special venting materials. Condensing units extract additional heat from the exhaust before discharge, reducing exhaust temperature to 100 to 120 degrees Fahrenheit. This additional heat extraction improves thermal efficiency from approximately 80 to 84 percent (non-condensing) to 90 to 96 percent (condensing). Condensing units are generally more expensive but may be offset by energy savings and utility rebate eligibility over the unit’s service life. Our plumbers explain the venting implications and efficiency tradeoffs of each type for your specific installation location.
Does my Phoenix home need a gas line upgrade for a tankless water heater?
Possibly. Tankless water heaters require significantly larger gas flow volumes than tank heaters during firing. Most tank water heaters operate at 35,000 to 45,000 BTU. Most residential tankless units require 150,000 to 200,000 BTU at peak demand. If your home’s existing gas line was sized for tank water heater demand, it may not deliver adequate gas pressure to a tankless unit under full flow. Our plumbers assess your current gas line diameter and pressure drop from the meter to the installation location before specifying the unit to confirm whether gas line modification is required.
What warranties come with a new tankless water heater from A Quality?
New tankless water heater installations from A Quality HVAC and Plumbing Services LLC are covered by our lifetime installation guarantee on workmanship, plus the manufacturer’s equipment warranty. AO Smith and Bradford White both offer tankless warranties in the 12 to 15 year range on heat exchangers for registered units, with shorter coverage on parts and labor. Our plumbers register manufacturer warranties during installation and provide documentation for your records. Manufacturer warranties for units in Phoenix’s hard water conditions typically specify annual professional maintenance as a warranty compliance requirement.
Can a water softener extend the life of my Phoenix tankless water heater?
Yes, substantially. A whole-home water softener removes calcium and magnesium before they enter the plumbing system, eliminating the mineral precipitation that causes heat exchanger scale in Phoenix tankless units. Households with properly functioning water softeners typically extend their tankless descaling intervals significantly and experience heat exchanger condition consistent with what a nationally average water hardness environment would produce. Our plumbers can evaluate your current water softener performance and recommend whether softener service is warranted as part of a tankless water heater consultation.
What are common tankless water heater error codes I might see in Phoenix?
Common error codes on Phoenix tankless units typically indicate flow sensor issues from partial blockage by mineral deposits, high temperature limit trips from heat exchanger surfaces operating at elevated temperatures due to scale insulation, combustion errors from burner assembly fouling, and heat exchanger differential temperature codes indicating reduced thermal transfer efficiency. In most cases, these codes correlate directly with overdue descaling or mineral deposit accumulation in the flow path. Our technicians diagnose error codes with manufacturer-specific diagnostic tools and address the root cause rather than simply resetting the unit.
What should I do if my tankless water heater stops producing hot water in Phoenix?
Check the error code display on the unit and note the code. Confirm that gas supply is active and that the unit’s circuit breaker is on. Check whether the cold water inlet filter screen is accessible and inspect it for mineral blockage. If these basic checks do not identify an obvious cause, call a licensed plumber for professional diagnosis. Do not attempt to clear error codes by resetting the unit repeatedly without identifying the root cause, as some codes indicate conditions that cause cumulative damage if the unit continues operating.
Can I get a tankless water heater if my Phoenix home has very hard water?
Yes. Phoenix hard water conditions do not prevent tankless water heater installation. They do require annual professional descaling and make a paired whole-home water softener a meaningful protective investment. Our plumbers have installed and maintained tankless units throughout Greater Phoenix for many years and have calibrated their maintenance schedules specifically to Maricopa County water conditions. We will explain the specific maintenance commitment your household should plan for based on your home’s current water softening status before you commit to a tankless installation.
Does A Quality service Rinnai, Navien, and other tankless brands in Phoenix?
Yes. A Quality HVAC and Plumbing Services LLC services all major tankless water heater brands installed in Phoenix-area homes, including Rinnai, Navien, Rheem, Bradford White, AO Smith, Noritz, and others. Our technicians carry diagnostic equipment and descaling supplies compatible with the full range of residential tankless systems present in the Greater Phoenix market. Service for brands other than our installation brands is performed at the same professional standard as service for units we installed.
How is tankless maintenance different from tank water heater maintenance in Phoenix?
Tank water heater maintenance in Phoenix centers on annual flushing to remove sediment from the tank bottom and anode rod inspection to protect the tank lining. Tankless water heater maintenance centers on annual heat exchanger descaling using citric acid or commercial descaling solution circulated through the heat exchanger via service port connections. Tank maintenance can often be partially performed by an attentive homeowner with a garden hose. Tankless descaling requires specialized equipment, the correct descaling solution for the heat exchanger materials, and knowledge of the specific unit’s service port configuration. Annual professional service is appropriate for both types in Phoenix.
What is a recirculation pump and do Phoenix tankless homeowners need one?
A recirculation pump maintains a small flow of hot water in a dedicated return loop so that hot water is instantly available at distant fixtures when a tap is opened. Without a recirculation system, a tankless unit requires the cold water in the pipe between the unit and the fixture to be purged before hot water arrives, which can take 30 to 90 seconds in a large Phoenix home with long pipe runs. For Phoenix homeowners whose master bathroom or kitchen is far from the water heater location, a recirculation pump significantly improves convenience and reduces water waste. Our plumbers can assess your pipe layout and recommend whether recirculation adds meaningful value for your specific home.
Can tankless water heaters qualify for tax credits in Arizona?
Federal tax credits under current IRS guidelines are available for qualifying heat pump water heaters that meet efficiency thresholds. Standard gas or electric tankless water heaters do not qualify for federal energy tax credits under current law as of 2026. Condensing gas tankless units with qualifying efficiency ratings may be eligible for utility rebate programs from APS or SRP depending on current program availability. Our plumbers can identify current rebate eligibility during consultation based on the specific unit under consideration.
Why should I choose A Quality HVAC for tankless water heater service in Phoenix?
A Quality HVAC and Plumbing Services LLC has served Greater Phoenix plumbing customers since 1995, licensed under ROC 348651 (Specialty Dual CR-37 Plumbing), fully insured, and BBB A+ accredited. Our licensed plumbers install and service AO Smith and Bradford White tankless systems, carry descaling equipment calibrated for Phoenix hard water conditions on service vehicles, and handle permit acquisition and inspection coordination for every installation. We have 17,000-plus verified reviews and a 100% satisfaction guarantee on all work. Call 623-853-1482 any time for 24/7 tankless water heater service throughout Greater Phoenix.
Related Water Heater and Plumbing Services in Greater Phoenix
Explore our full Phoenix water heater services or compare the tank water heater option alongside the tankless. For whole-home water quality improvements that reduce descaling frequency, see our reverse osmosis systems and water softeners pages. For urgent no-hot-water situations, our 24/7 emergency plumbing service is available around the clock.
We serve the full Greater Phoenix metro area including Goodyear, Peoria, Surprise, Sun City, Glendale, Avondale, Buckeye, Scottsdale, and surrounding communities. View the full Phoenix service area or visit our main tankless water heater page for our complete tankless service overview.
Schedule Your Phoenix Tankless Water Heater Service Today
Phoenix’s hard water demands more from your tankless water heater than most U.S. markets. Annual professional descaling, correct initial sizing, proper gas line preparation, and permitted installation are all non-negotiable for long-term system performance in this environment. A Quality HVAC and Plumbing Services LLC brings licensed plumbers, manufacturer-specific equipment, 30 years of Phoenix-area experience, and a 100% satisfaction guarantee to every tankless service call.