Tankless Water Heaters in Phoenix and Scottsdale, AZ
Tankless Water Heaters
Thinking about making the switch to a more efficient water heating system? At Allegiance Water Services, we specialize in installing and servicing tankless water heaters for homeowners in Phoenix and Scottsdale. These on-demand systems are quickly becoming the go-to choice for families who want reliable, energy-saving hot water without the bulky tank. Whether you’re upgrading your current setup or building a new home, we’re here to help you find the right residential tankless water heater—and make the whole process easy from start to finish.
What Is a Tankless Water Heater?
A tankless water heater gives you hot water only when you need it. Since this isn’t a traditional water heater, there’s no waiting for a tank to refill. No wasted energy keeping water hot 24/7. It heats water on demand as it flows through your pipes, delivering hot water instantly and continuously.
If you’ve ever had to schedule showers or run out of hot water during laundry, this fixes that.
And in places like Phoenix and Scottsdale, where utility costs are high and space is limited, tankless hot water heaters just make more sense.
Why Homeowners Are Switching to Tankless
There are so many benefits to switching to a tankless water heater. Here are some of the best ones:
- You’ll Save Money – Tankless water heaters are more energy-efficient than traditional tanks. That means lower energy bills every month—and over time, those savings really add up.
- You’ll Free Up Space – Forget the bulky tank taking up room in your garage or utility closet. Tankless units are small, wall-mounted, and sleek, leaving you more space for storage or simply decluttering.
- You’ll Never Run Out of Hot Water – Have guests over? Two showers going at once? No problem. Residential tankless water heaters give you an endless supply of hot water, no matter how busy life gets.
Which Type Is Right for You?
There are two main types of tankless water heaters to consider:
- Tankless Gas Water Heaters – Great for larger households or high-demand use. They heat water fast and keep up with multiple appliances running at the same time.
- Tankless Electric Water Heaters – Compact, efficient, and perfect for smaller homes or if you don’t have access to natural gas.
Not sure which is best for your setup? We’ll help you compare residential tankless gas water heaters and tankless hot water heaters, electric, based on your water usage, layout, and budget.
What to Expect from Professional Installation
Installing a tankless system isn’t something you want to DIY. It involves gas or electrical hookups, plumbing reroutes, and safety checks. At Allegiance Water Services, we handle every detail:
- We assess your home and recommend the right size and model.
- We remove your old water heater (if needed).
- We handle all tankless water heater installation with care and expertise.
- We walk you through how to use and care for your new system.
It’s fast, efficient, and done right the first time.
Keep It Running: Tankless Water Heater Maintenance & Repair
Like any home system, routine maintenance keeps your tankless unit running at peak efficiency for years to come. Easy tankless water heater maintenance tips:
- Flush the system once a year to prevent mineral buildup
- Keep air vents clear
- Check for error codes or drops in water pressure
Ignoring maintenance can lead to avoidable breakdowns, and no one wants a cold shower during winter. For long-term reliability, let us handle your tankless water heater maintenance with annual tune-ups and inspections.
When Something Goes Wrong
Our team is ready to troubleshoot and fix common issues like:
- Sediment or scale buildup
- Ignition or flame sensor errors
- Inconsistent water temperature
- Low flow or water pressure
If you notice anything unusual, don’t wait—call us for fast and honest tankless water heaters repair.
Choosing the Right Company Matters
You’re not just buying a water heater—you’re trusting someone to install it safely and stand by the work. So here’s why homeowners choose Allegiance Water Services over the big-box guys:
- Licensed, bonded, and insured
- We know Phoenix and Scottsdale plumbing inside and out
- We install both tankless gas and electric systems
- We offer honest pricing, reliable service, and fast scheduling
- We’re committed to sustainability and water conservation
- Our customers trust us, and we treat your home like our own
If you’ve been Googling “plumbers tankless water heaters near me,” you’ve found your people.
Let’s Make Your Home More Efficient—Starting Today
You don’t have to live with inconsistent hot water, high energy bills, or an outdated system. Whether you’re ready to install or just exploring your options, we’re here to help.
Call Allegiance Water Services today or contact us online to schedule your tankless water heater consultation.
Frequently Asked Questions
How Do Tankless Water Heaters Work?
A tankless water heater skips the storage tank and heats water only when you open a tap. Inside the compact unit, a flow sensor detects water movement and signals the control board to fire powerful gas burners or activate electric heating elements. Cold water passes across a tightly wound heat exchanger, quickly absorbing heat as it moves through the system. Temperature sensors and electronic controls constantly adjust the flame or power level to maintain your set temperature. Once heated, the water travels directly through your plumbing to showers, faucets, or appliances. When you close the tap, the system shuts off, wasting far less energy than a traditional tank. Allegiance Water Services will gladly provide more details about tankless water heaters and how they can benefit your household.
How Long Do Tankless Water Heaters Last?
Tankless water heaters are known for their longevity. These energy-efficient models often run for 15 to 20 years or longer when you care for them properly. Their lifespan depends on water quality, usage patterns, installation, and the brand’s build quality. Hard water accelerates scale buildup inside the heat exchanger, forcing the unit to work harder and wear out faster. Oversized or undersized systems also experience extra stress. Regular maintenance, such as annual flushing, descaling, and cleaning intake screens, helps protect internal components, maintain efficiency, and prevent overheating errors. Having a professional periodically inspect and service your tankless water heater keeps small issues from shortening its life, so you get the maximum return on your investment.
Are Tankless Water Heaters Worth the Investment?
Deciding if a tankless water heater is worth the investment comes down to how your household uses hot water, your energy costs, and how long you plan to stay in the home. Families that regularly run showers, laundry, and dishwashers, or homeowners focused on efficiency and space savings, often see the most value. Below, we’ve outlined several common benefits of investing in a tankless water heater to supply hot water throughout a household:
- Endless hot water on demand for busy households
- Higher energy efficiency and lower utility bills over time
- Longer expected lifespan than many traditional tank models
- Compact size that frees floor space in tight homes
- Reduced risk of large tank leaks and related water damage
Do Tankless Water Heaters Require Maintenance?
Tankless water heaters absolutely require regular maintenance if you want them to run efficiently and reach their full lifespan. At least once a year, or more often in hard‑water areas, a professional like Allegiance Water Services should flush and descale the unit to remove mineral buildup inside the heat exchanger. They will also clean or replace inlet screens, check and clear the condensate line if applicable, inspect venting, and confirm gas or electrical connections are safe and properly adjusted. Homeowners can periodically check the air filter and keep the area around the unit clear. Consistent, professional maintenance prevents error codes, protects efficiency, and helps avoid sudden breakdowns or expensive premature replacement.
Can a Tankless Water Heater Supply Hot Water to an Entire Home?
Check Out Our Customer Reviews
Overall Rating
Installed water softener
Friendly and reliable. Does great work!
Eloy is just awesome, friendly, detailed, professional and took time to walk me through all work completed, highly recommend.
Allegiance and Eloy are my "go to" plumbers. Prompt, efficient, cost effective and courteous.
Fast, reliable. Polite repair people. Fair price.
What a great job by everyone involved in this process!! A new drip system was installed in both the front and back yards - first time a system was installed by real professionals. System works great and is easy to use!! Highly recommend Allegiance!!!
Great company! My water heater and water softener both decided it would be best to stop working on the same day. Allegiance came out and gave me a quote for both and their price was great. I feel like they were really interested in helping me.
Assessed my sprinkler system. Told me and showed me the main issue I'm having. No charge! Very nice and knew the answers to my questions. Didn't try to sell me anything. Will have these guys over everyone else I've done business with.
Allegiance Water Services are prompt, thorough, and professional. I found them when they did work on my next door neighbor’s irrigation system. When my irrigation started leaking and watering weeds, I called Allegiance Water Systems for a quote and then to schedule repairs. They send text messages and emails with links to track your technician or to call them direct. Invoicing is quick and easy to access via their billing system. You have everything in writing with links to confirm, deny, or modify your service needs.
Excellent job! Will use them again.
Lawson was incredibly friendly, informative and professional. David was also a standout for his strong communication and customer service. 10/10 would recommend to friends and family.
Great company. We would highly recommend them. Courteous, professional, fast response time. Very reasonable rates. This is the third time we have used their services and have been very happy every time.
Fixed my backyard sprinklers without having to put a whole new system in.
Very prompt service and were there at scheduled times. Both tecs that have been here, Dan and John, were outstanding. Very professional staff including Josh. Pricing is reasonable. I would highly recommend this company.
He was wonderfully informative and polite. Educating me on my irrigation system, as I'm from Michigan and very unfamiliar with them.
The service tech was pleasant, courteous and knowledgeable. He tracked down the problem and eliminated it as quickly as possible, as he was aware that what his time cost us in getting the job done.
Josh and the office and service tech Rommel were excellent in every way! Professional, knowledgable service of issues with my water softener.
I had made an appointment for Thursday, but was pleasantly surprised to receive a call on Wednesday that Eloy could come out a day early. They serviced my RO water system and soft water system. They exhibited excellent attention to detail and worked in a professional manner. When finished they cleared explained what we needed to to do move for the coming year. I will certainly use them again for annual inspections and servicing.
I have used Allegiance for years now and every time I'm still amazed at how courteous and professional they are. Every year I have my R.O. filter changed and my soft water big blue filter changed. They also perform my mist services for the backyard with shutdown for the winter and startup in the spring. 100% recommend them!
Will make sure the job gets done!
Lawson with Allegiance Water has done work for us the last few times and he’s very polite and professional and has done great work for us!
I was in a panic when my sprinklers started making loud noises at 5:30am. I called Allegiance water and was able to get a service rep out the next day. They...
Lawson installed a reverse osmosis system at our new home today. While he was here, he also helped answer (many!) other questions and helped inspect the home’s irrigation system for me. He was thorough, professional, friendly, and patient. Thanks so much Lawson and Allegiance!
Fast and reasonable.
John was very knowledgeable and pleasant to work with. Unfortunately, he didnt have the parts i needed so he will be returning in a couple of days to do the actual work. I will update after the work is completed.
Ruben and Juan were the best! Great attention to details, all zones were color coded, and helped us with the use of the Rain Bird app. We couldn’t be happier with the great work!
Looking into my options as soon as I hear back about my options
Paul is all of the above plus irrigation systems technologically advanced.
I love this business. They go the extra mile to make sure their clientele are taken care of. My hot water heater went out on New Years eve and required a part to fix it. The part was unavailable and Rheem the manufacturer was closed until Monday. John Gonzales from Allegient brought out a new unit and installed it, so that I would have hot water for the weekend. This is a great company, and I am glad that I selected them. UPDATE Allegiance is my go to water company. My house is 50 years old now, so I'm glad I have them to call if I have a problem. Rommel Valenzuela came today to service my filtration system. He was nice, professional and did a great job.
Technician patiently walked me through my current setup, identified multiple leaks, and looked to save money by combining and eliminating unneccesay zones.
Allegiance Water Services was great! They prioritized my urgent request and Lawson was great when he came to diagnose the issue. He thoroughly explained the problem and gave me different options and advice on future work. 5 star support!
Allegiance has been great. Eloy was perfect. I recommend this company highly and will certainly continue to use them in the future.
John was extremely professional and courteous explaining in detail the problems with my irrigation system. He made the repairs and added recommendations as well. He was the best! I highly recommend! Pull
Valley Wide Service
