To our valued customers:

Arnett's will remain open during the Covid-19 epidemic to continue providing you with our line of outstanding service and products. We are committed to taking every precaution to keep everyone healthy and safe. To this end, we have enhanced our cleaning procedures and doubled down on sanitary measures to ensure the safety of both our clients and our service team.

We also offer video conferencing calls and diagnostics via Zoom, so if you have a question or concern regarding your tankless water system, we can be there to talk with you face to face from the comfort of your own home.

San Diego Tankless Water Heater Sales, Installation, & Repairs

Serving the Greater San Diego Area Since 1993

Arnett’s Water Systems is proud to be San Diego’s leading provider of Tankless Water Heaters, including Tankless Water Heater installations and Tankless Water Heater repairs. Arnett’s Water Systems has trained, licensed, and insured specialists to provide you with the same day hot water, new tankless water heater installation, repair, and annual maintenance.

Arnett’s is ready to service San Diego area residential and commercial services.

Arnett’s is a locally-owned-and-operated family business that has proudly served the greater San Diego area for over 25 years. Our mission is to provide our customers with the best tankless water heaters, water filtration systems, and water softeners for a reasonable price.

We have a team of trained technicians working around the clock to provide our customers with tankless water heater installation and repair, water system flushing, recirculation pumps, and routine maintenance. In addition to carrying our own line of water systems, we are the #1 provider of Noritz tankless water heaters in San Diego.

Arnett’s continues to maintain a perfect A+ rating by the Better Business Bureau (BBB).

Learn About Tankless Water Heaters

Wondering about tankless water heaters? Well, what better way to learn about them than from a tankless water heater expert at Arnett’s Water Systems?

Erik Arnett, owner of Arnett’s Water Systems, answers some of the most common questions surrounding tankless water heaters and provides insight on what you, as a homeowner, needs to know about them.


We Offer Financing for Tankless Water Heaters and Water Treatment Systems

  • Low Monthly Payments
  • Low Interest Rates
  • Quick Approval
  • All Tankless Water Heaters & Filtration Systems

If you’ve been holding off on purchasing or upgrading to a new tankless water system because you think it will cost too much, we’ve got great news for you! Arnett’s is pleased to announce that we now offer financing on ALL MODELS of tankless water heaters, filtration systems, and water softeners!


In the market for a tankless water heater? Arnett’s has you covered.

Nortiz Authorized Dealer San Diego CA
Noritz EZTR40 Tankless Water Heater San Diego

Noritz EZTR40 Tankless Water Heater

.87 Uniform Energy Factor
Minumum 15,000 to Max 120,000 BTUh
0.5 to 6.6 GPM

Noritz NRCR111 Recirculation Tankless Water Heater San Diego

Noritz NRCR1111 Recirculation Tankless Water Heater

.81 Uniform Energy Factor
Minimum 16,000 to Max 199,900 BTUh
0.5 to 9.8 GPM

Noritz NR98 SV Tankless Water Heater San Diego

Noritz NR98 SV Tankless Water Heater

.81 Uniform Energy Factor
Minimum 16,000 to Max 199,900 BTUh
0.5 to 9.8 GPM

Noritz EZ111 Tankless Water Heater

.96 Uniform Energy Factor
Minumum 18,000 to Max 199,900 BTUh
0.5 to 11.1 GPM

Noritz NR98 OD Tankless Water Heater San Diego

Noritz EZ98 Tankless Water Heater

.96 Uniform Energy Factor
Minumum 18,000 to Max 180,000 BTUh
0.5 to 9.8 GPM

Arnett's Water Systems


CALL US TODAY AT (619) 223-1209

I met Erik through my motorcycle shop over two decades ago. Not only do I look up to and admire him for his business ethics and professionalism, Eric has become one of my best friends. In fact, Eric hired me to work for him for several years. He and I installed over 400 tankless water heaters together. One of which was my unit, now 12 years old. We recently had a conversation, and he asked if I still had the same unit. The answer was, yes! He was surprised, as followed by recommendations, I have kept it cleaned every year with the vinegar treatment. Probably going to upgrade to the more efficient version soon! Arnetts Water Systems will be the only one I will refer to and use.

David D.

Some of our clients who use
Arnett's tankless hot water heater in San Diego

Common Theory
Iconic on Alvarado
True Food Kitchen
Born and Raised
Jimmy's Famous American Tavern
World Gym
Model Call
Miguel Cocina
Ocean Beach Hotel