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
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.
They have done several projects for us and they were done efficiently and well. I highly recommend them for any water service
Arrived on time , perfectly described a job he'd be doing and provided excellent service , would recommend him to all of my neighbors, did a great job fixing my water heater leak
I’ve used this company for multiple services! And they are great at everything they do. They are super responsive to all of my needs and are always on time. I will never use any other company!
We have used Allegiance Water Services for several years now, and we have not been disappointed. Very professional, quality work, friendly, reliable.
Excellent job! Will use them again.
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!
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.
He installed a water softener system and did a great job. He also updated our r/o system. Very professional
They answered the phone (after several other business didnt) and came right out to do the estimate and complete the work. Quality is good. Will call next time I need sprinkler/landscaping work.
Had a hot water heater replaced today; Lawson did a fantastic job. The workmanship is very professional. Lawson was on time and did exactly what he said he was going to do.
Extremely impressed and satisfied with professionalism and service. A real person always available by phone unlike several competitors I tried to reach. Eloy the tech was the best in all respects.
Lawson was punctual, polite, clean and knowledgeable. He serviced the RO system. Recommended an alarm to detect a leak. Will think about it.
Why should you hire Allegiance? Quality. Dependability. Customer service. Experience. Dedication. Hard work. This company takes quality experience and service to the next level. I haven’t worked with many home service companies who do such a good job like this. From the moment we got the quote, until the minute the job was done, they were reliable and they provided the service we requested. First they came out to inspect the issue. Once they figured out what was wrong, they provided a verbal quote and followed up with a digital quote. I was able to accept the quote digitally and put a deposit down to begin the work. Since our system needed to be replaced, it was quite a process and luckily they had it all under control. They contacted the city and cox communications to flag their underground items so that they knew where to avoid. Then Lawson came out and literally spent an entire day replacing the system. The customer service was above and beyond. Yes there are a million plumbers and irrigation companies out there, but there aren’t as many reputable, trustworthy, licensed and qualified ones like Allegience.
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...
I had an exceptional experience with Allegiance today. My old gas water heater needs to be replaced. I called Allegiance yesterday and discussed with David who is very knowledgeable, transparent and told me pros and cons among the different water heaters. I decided to go with 50 gallon Bradford White water heater. Ruben came in next day and clearly explained to me what is the process. He is excellent, very skillful and told me how to maintain it. He cleaned everything afterwards. I am very happy with their services and will call Allegiance for my plumbing issues for sure. Ruben from Allegiance Water Services did an excellent job again today. I had water hammer issue for a couple of months and my pipes coming out the main pipe weren't connected right by a previous plumber. The irrigation system controller needs to be replaced as well And it is now upgraded to an enabling phone control unit. Ruben did an excellent job on replacing the unit and repiping everything. It only took him an hour and they work great! Ruben is very experienced, knowledgeable and efficient. It wouldn't go wrong for Ruben to do your plumbing jobs.
I had Eloy come by to repair a water softener system that had failed, as well as replace the filter in the RO system. He was courteous, knowledgeable, responsive, timely, and really knew his stuff.
Looking into my options as soon as I hear back about my options
Would highly recommend. Lawson was very professional.
Allegiance Water Services sent a repair man to fix a broken sprinkler head.. He was courteous, pleasant and well informed. He fixed the head and checked to be sure the whole system was working again correctly. I appreciated his service. Thank you
Highly recommend for Navien install and servicing.
Eloy is just awesome, friendly, detailed, professional and took time to walk me through all work completed, highly recommend.
After 5 years we had water softener , we found out we use soft water for our pool and watering the plants in our back yard , so I called this company they responded fast and the next day they sent their technician Ruben . After we agreed on his estimate , he came the next day. He did awesome job on separating our soft water. Ruben was knowledgeable, fast and reliable. I am so happy with his work and recommend him and this company to everyone.
Very smooth transaction! One phone call got the osmosis and softner system scheduled and an experienced technician came and installed both within 2 hours! Great experience. Thank you!
David was terrific to work with to get my endless questions answered and align on the right water softener system. Lawson, who installed the water softener was outstanding. He explained service and care issues and did a very professional install. The whole team takes their customers satisfaction seriously. I'll be back for future plumbing needs!
I have used Allegiance Water since 2018. The company and service is outstanding. John Gonzales was our repair person for this call. He changed our RO water filters, installed a leak detector for the RO, and repaired our water shut off valve. He was GREAT!!! He is very knowledgeable and dependable. I highly recommend Allegiance and their team. Thanks
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.
Fast, reliable. Polite repair people. Fair price.
Allegiance is fantastic. Lawson in particular is a total professional. Super knowledgeable, trustworthy, and efficient. Diagnosed our crazy irrigation issues and came up with a cost effective solution.
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.
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 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!
Technician was here within 30 minutes. Did a great job for a fair price. I highly recommend Allegiance…..
Excellent communication. Reliable.
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