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.
Check Out Our Customer Reviews
Overall Rating
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!!!
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.
Fast, reliable. Polite repair people. Fair price.
Would highly recommend. Lawson was very professional.
Annual service on RO water system. Rommel was friendly, fast and professional.
Installed water softener
We have used Allegiance Water Services for several years now, and we have not been disappointed. Very professional, quality work, friendly, reliable.
Technician patiently walked me through my current setup, identified multiple leaks, and looked to save money by combining and eliminating unneccesay zones.
Highly recommend for Navien install and servicing.
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!
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!
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 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.
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.
I am so grateful to Lawson for helping me with my spinkler system. He is knowledgeable, kind, and patiently answers all my questions. I trust him and Allegiance Water Service for all of my home’s plumbing needs.
Paul is all of the above plus irrigation systems technologically advanced.
Excellent service. Rommel was very professional. I will call on them again. Marc C.
John was on time and professional. He fixed the leak in my backyard system and tested it to make sure no further leaks. He also checked the front yard and found an additional leak that I hadn’t noticed and also fixed it in the same trip. Super happy with the great service and will definitely call these guys again for future plumbing repairs outdoors and indoor.
Very professional and responsive. No guess work as to when they arrive. Explained everything and cleaned up yard after they were done. Recommend...
Excellent job! Will use them again.
Eloy is just awesome, friendly, detailed, professional and took time to walk me through all work completed, highly recommend.
Had an issue with my sprinkler system, something failed and I had a big wet spot on the side of my house. Called in and was helped with instructions on how to turn off the sprinkler side so no water would go to it until a repair could be scheduled. Paul comes out and shows me the problem, we set a time and he fixes all of that, THEN while testing, just waltzes into the spraying sprinklers and dials in where the water SHOULD have been spraying, like " oh, that's the wrong direction to spray for this area..." Then he programs the whole thing to fix my already mediocre lawn and bushes, told me what to do to improve my lawn through yard care and got into his car with soaking pants and thanked ME! 10/10.
Fast and reasonable.
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!
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
Looking into my options as soon as I hear back about my options
John was great. Professional and courteous. Very pleased with his work.
These guys replaced my Water Heater today. Prompt, fair price, easy to work with. 5 Stars is not sufficient to rate their quality
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!
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.
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!
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!
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
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
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.
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!
Allegiance and Eloy are my "go to" plumbers. Prompt, efficient, cost effective and courteous.
Valley Wide Service
