San Diego Tankless Water Heater | Sales, Installation, & Repairs

San Diego Tankless Water Heater Sales, Installation, & Repairs

Serving the Greater San Diego Area Since 1993

Arnett’s is a family-owned and operated business established by San Diego native We are proudly to be honored with the International Better Business Bureau for 2 years in a row.

We provide both commercial and residential plumbing service to the greater San Diego area since 1993. Our Mission is to offer the best service in San Diego County with reasonable price.

We have a group of professional technicians working 24/7, to give you water heaters installation, water heater repairs, water system flushing, recirculation pumps & regular maintenance. In addition to our own line of water systems, we are the # 1 Noritz Tankless Water Heaters provider.

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

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 instant Hot Water Systems

Common Theory Public House
Iconic on Alvarado
True Food Kitchen
Born and Raised