Arnett's Water Systems
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Arnett's Water Systems
Explore the various types of tankless water heaters and learn more about how you can benefit by making the switch to tankless. Transform your ordinary household water into healthy, pure water with a whole-house water filtration system and a whole-house water softener. Check out our latest specials.

We also offer a membership program and financing for both tankless water heaters and water filtration systems. Arnett's Water Systems is proud to be the leading provider of tankless water heaters in San Diego County and the #1 provider of Noritz tankless water heaters in San Diego.
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Founder and owner Erik Arnett can trace his San Diego roots back to the 1950's when his grandfather, Joaquin Arnett, pioneered drag racing in San Diego. His club of racers, known as Bean Bandits, were legendary in San Diego and across the nation. Joaquin Arnett was highly respected and celebrated in the racing community and was inducted into the international Car Racing Hall of Fame in 1992.
Founder and Owner Erik Arnett started Arnett's Water Systems in 1993. Erik was - and still is - passionate about the water systems industry. Since then, this family owned and operated business has served the greater San Diego area. For the first 12 years, we thrived on customer referrals and offered a full range of services - from commercial and residential remodels to repair and maintenance.
Tankless water heaters provide instant hot water when you need it - hence their other name, "on-demand water heaters." Compared to traditional storage tank water heaters, tankless water heaters will save you money, energy, and space. Arnett's Water Systems of San Diego sells the best tankless water heaters in the industry.
Save your plumbing, appliances, hair, and skin by installing a whole-house water softener. You turn on the tap, water comes out, and it is supposedly safe. But is it? Your tap water may be damaging to your health and home for a couple of different reasons. San Diego's water comes from various sources and travels through miles of pipeline before it arrives at your community and, finally, your home.
It's an all too familiar story - you turn on the hot water tap, and cold water immediately comes out of the faucet. You patiently (or impatiently) wait for the water to warm up, which may take minutes. Why does this happen? After you use hot water and turn off the tap, the hot water does not return to your water heater but stays in your pipes until it gets cold.
Reviews (26)
Barbara Emont
Barbara Emont
Jan 30, 2022
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It’s so uplifting to find a business where the service is beyond excellent, reliable, and honest. Arnett’s installed our second tankless water heater a couple of years ago and has been taking care of the maintenance on a regular basis. Erik gave us very sound advice on the brand to choose and how to maintain it. We have dealt with other companies and he has been the most knowledgeable and honest of all of them. We are so grateful to have found Arnett’s Water Systems!!
Sue Copp
Sue Copp
Jan 18, 2022
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Eric did a great job as always! You can tell that he really knows about tankless water heaters! He is very professional, courteous, and on time! I would highly recommend him!!
Gwynne Bruck
Gwynne Bruck
Jan 13, 2022
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Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
Quick response time. Our 13 year old tankless water heater died and Eric came to us within a couple of hours and Phillip replaced it the following day. They were very fast, efficient and clean. Everyone was very professional and a pleasure to deal with.
Service: Boiler installation
Ellen Jennings
Ellen Jennings
Dec 16, 2021
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Erik answered my call about a malfunctioning tankless water heater and came to look at it the same day. He took the time to discuss the pros and cons of repairing or replacing the unit, and he installed a new unit the next day. Very responsive. Very professional. I would definitely call Arnett's next time we need repair or service.
Kevin H.
Kevin H.
Nov 29, 2021
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I am extremely impressed with arnett's plumbing! Starting with my initial phone call, they were very honest and walked me through the options for a new water heater and answered all of my questions. They were super fast at helping me out and taking care of my issue. I called  sunday night at about 5pm and they had their crew at my house, with the new water heater at 9:30am the next morning. The technicians  where prompt and extremely professional! The work was high quality and they left the area cleaner than it was when they arrived. I feel like the cost for the water heater and installation
Kevin Hosseini
Kevin Hosseini
Nov 29, 2021
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I am extremely impressed with arnett's plumbing! Starting with my initial phone call, they were very honest and walked me through the options for a new water heater and answered all of my questions. They were super fast at helping me out and taking care of my issue. I called  sunday night at about 5pm and they had their crew at my house, with the new water heater at 9:30am the next morning. The technicians  where prompt and extremely professional! The work was high quality and they left the area cleaner than it was when they arrived. I feel like the cost for the water heater and installation
Fernando Bosco
Fernando Bosco
Nov 25, 2021
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Excellent service. My 11 year old tankless water heater died overnight. I called them because I found consistent excellent reviews across different websites. In less than an hour Erik, owner, was in my house to diagnose the situation (new water heater needed). Installers came within 2 hours and did a very professional job removing the old unit and installing the new one. Very pleased and will recommend.
Will Cooper
Will Cooper
Nov 23, 2021
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Eric Arnett and his team were really great and did an emergency 1-day install of a Noritz tankless water heater for me. I’ve used Arnett’s since 2008 and never had any issues. Very professional !
Service: Boiler installation
Dani F.
Dani F.
Nov 19, 2021
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We recently had a sudden leak in our conventional water heater. After googling a few companies and reading reviews, we decided to call Arnett's Water Systems. My husband received a call earlier that same morning from Arnett's explaining and educating him on tankless systems. We decided to update our conventional to the tankless after reviewing the benefits of switching. Not only did we receive excellent customer service, but they also provided same-day installation, as well as the crew cleaning up and removing our old big tank. The whole process from start to finish was incredibly easy
Tahny Tran
Tahny Tran
Sep 24, 2021
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Eric Arnett, who is the owner, came to my home within an hour after my call for an emergency service for my tankless water heater. He did a quick reset and it worked. Eric said to keep an eye on it and if it acts up again, he can come back to flush the system and also do a software upgrade. He didn't even charge for this initial quick service. After two days, the problem came back. I contacted Arnett's Plumming Water System and scheduled an appointment. The system is 6 years old and never had a service. I didn't know that you are supposed to flush the system yearly. This time it took a few days
MArtha Oldstrom
MArtha Oldstrom
Jun 26, 2021
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I am very glad that I decided to get a tankless water heater from Arnett’s Water Systems. Erik gave me an estimate and explained how the water heater operates. Philip and Anthony removed the old water heater and installed the new one. They were very professional and everything went well. The water heater area is now roomier and I no longer have to worry about destructive leaks.
Pedram F.
Pedram F.
Mar 25, 2021
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I've 2 different companies come and pretend to look at my Tankless water heater and try to rip me off. The Arnett experience was. Erik and Team were great, On Time, On Schedule, Professional and Honest. . . Looked at the old tankless, provided options and made a professional recommendation.
We moved forward with replacement of the unit and installing a softener as well.
Absolute pleasure to work with. Highly recommend with a Gold Star.
Bob F.
Bob F.
Mar 23, 2021
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These guys are great. Very fair priced and professional. They put in a new unit for us last year and were out to do the annual maintenance. It's was a pleasure doing business again with this company. Bob fillion Coronado
Michael D.
Michael D.
Feb 08, 2021
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Awesome experience with Arnett's Water Systems! Erik was exceptional and answered all my questions patiently and thoroughly! His crew who did the install were all very professional and got the job quickly and cleanly! It was a very painless process! If you are going tankless, I definitely recommend Arnett's Water Systems!!! I wish I could give them 10 stars!!!!!!!!!!!
Doug M.
Doug M.
Jan 30, 2021
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Arnett's installed my Noritz water heater in 2009, and I haven't thought about it since - until today, when I turned on the hot water and nothing came out. I called Eric, and he was at my house (on a Saturday!) by mid-morning.

He made some adjustments, fixed the problem, showed me how to fix it myself next time, and didn't charge me for the visit. That is exceptional service.

I'd definitely recommend Arnett's to anyone who wants a tankless hot water heater.
Rawan B.
Rawan B.
Jan 27, 2021
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These guys are amazing. Eric came by to check on our water heater even though it was the day before Christmas. This guy is very honest and their thankless water heater system is phenomenal. Thank you Eric!
Pat F.
Pat F.
Nov 20, 2020
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This is the 2nd time we have hired Arnett's for our home water related needs. Arnett's installed our tankless water heater back in 2009, and we had them replace a 20-yr old water softener which had been out of service for quite some time. We purchased a salt-based Naiad S1054 water softening system, and have been happy every step of the way! From our initial phone call to Andrea, to Erik's revisit to our home to provide our estimate, to the actual installation performed by Phillip & Tony, everything was first class, professional, they took great care when removing our old softener
Joan H.
Joan H.
Nov 04, 2020
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Arnette's installed my tankless water heater many years ago and have done all maintenance on it since then. Erik has alway done a great job and has even come back for an emergency without charging me. I highly recommend Arnette's
Joan H
Ish S.
Ish S.
Sep 21, 2020
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Erik the owner showed up with a mask on. He was very knowledgeable in the Noritz tankless heater. I called two different companies before him and they wanted $$$$ to replace it and Erik fixed the problem within minutes! No need to replace so he saved me a lot of money!! I would definitely call him and his company again because I know he is honest and not just looking to make money like the other companies out there.
Christian G.
Christian G.
Jul 22, 2020
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Disclaimer: If you're not into long stories (it's positive), then here's a synopsis:
Arnett's provided exceptional customer service, an outstanding product, and their owner/operator, Erik, is genuine and honest in an arena where prices and plans can be all over the map. Understanding that cost is a factor for many in this world, Arnett's offers extremely reasonable pricing and their ability to accommodate customers' schedules is terrific. In summary, finding a company that provides skilled installation, candid and thorough explanation of the plans, communicates honestly
Mike K.
Mike K.
Jul 13, 2020
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Arnett's installed an "on demand" water system in our house and it rocks. They were pleasant to work with from start to finish and the unit has worked flawlessly for the past year. Fair pricing too. Highly recommended.
Kelley S.
Kelley S.
Apr 06, 2020
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Very quick, friendly and professional. Started my day with a leaking Old Hot Water Tank and ended with a brand new, more efficient Tankless Water heater. Thanks guys!
Dylan D.
Dylan D.
Mar 20, 2020
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The meeting to discuss my needs and options was informative. We agreed on a water softener and tankless heater package that was right sized and fit my budget. I did not have to fend off any attempts at up-selling, which I appreciate very much.

The installation event went flawlessly. The equipment was installed on time without any complications.

We're now happy to be living the dream of soft water.
Ralph T.
Ralph T.
Jun 11, 2018
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Mark did an excellent job with our replacement Noritz tankless water heater. The previous model worked perfectly for 10 years but finally pooped out. While replacing the water heater Mark noticed that the vent was improperly installed. He fixed that too and recaulked everything so that it wouldn't leak from the roof. He also installed a recirculating pump so that hot water would instantly flow from the back bathroom.
He was efficient, organized and neat - A REAL PROFESSIONAL.
Vanessa B.
Vanessa B.
Jun 08, 2018
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We'd been suffering a long malfunctioning water softener. I was having a difficult time finding somebody to come look at it. When I called Erik he told me that softeners don't really need service, but I explained to him the issue (losing resin) and he said he'd come take a look for me. That was further than I was able to get with any other service company, so I was grateful for the help.

Turns out our ancient water softener was beyond its useful life, so Erik hooked us up with a new one within a matter of a couple of days. He showed up on time and installed a new softener and a
Cristian L.
Cristian L.
Jan 04, 2018
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Was shopping for a commercial-grade tankless water heater to replace an existing A.O. Smith Cyclone. Upon yelp reviews I decided to call a few local plumbers, and Eric was the most responsive and attentive. Eric took the effort to come check out our situation the same day we called. On that same day he even drove back to his yard to haul over his portable-hotwater-on-demand trailer system. Which provided us backup for hotwater and to keep the business going!!! This trailer was legit, the tankless heaters and piping setup is what every water-heater-geek would dream about.

Overall, Arnett&apos