San Diego Tankless Water Heater Sales, Installation, & Repairs

Serving the Greater San Diego Area Since 1993

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 water heaters, 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 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 is proud to be San Diego’s leading water heater provider – and it shows! Arnett’s has been given an A+ rating by the Better Business Bureau (BBB) two years in a row.

Arnett's Water Systems


CALL US TODAY AT (619) 223-1209

Arnett’s Water Systems is proud to present our new Membership Program!

As preferred member, you can greatly reduce downtime related to repair issues on your units.

Our goal is to help maximize your investment and ensure the longevity of your water system by promoting and maintaining energy efficiency over time with our maintenance services. You (and your system) will be happy you made the preferred membership choice.

Our team will be happy to discuss your needs and options with you. If you want to become a Preferred Member, please contact us at (619) 223-1209 or email us at

When you join our Membership Program, you’ll receive the following benefits:

  • Annual Inspections
  • Emergency Services at No Additional Cost
  • Priority Service for Routine and Emergency Calls
  • 10% Off Service/Repairs (Excluding replacements or new installs)
  • Your Membership can be transferred to your new home or to the buyer of the home you sell

I really appreciate the level of service that Erik Arnett and his team provided. I have had my Rinnai tankless water heater for about a month now and it has worked perfectly, replacing a 75 gallon tank heater in the garage. The heater they spec'd is able to keep up with 4 simultaneous showers with capacity left for running a few faucets. Erik's team was extremely prompt in scheduling the appointment, provided an excellent recommendation regarding placement of the heater, and did a very 'clean' install. There were no hassles from the moment they showed up in the morning until they swept up the last bit of dust in the afternoon. I would definitely hire them again.

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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
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Model Call
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Ocean Beach Hotel