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


If you’re considering having a tankless water heater or a water filtration system installed into your home or business, just give us a call and schedule a visit. We’ll be happy to assist you and your family!

Conventional Water Heaters

Conventional water heater tanks burn fuel 24/7 to ensure hot water is available for the entire household. Whether you’re home using your hot water or not, think about how much these conventional, large tanks run your fuel, water, and energy bills?

Tankless Water Heater

Tankless Water Heaters are compact revolutionary units. These water units represent modern technology at its best by providing heated water on demand only.  Hot showers and sink water from faucets are ready to go by simply turning your faucets on. Instant heated water!  Imagine that? 

Not only does the tankless water system provide instant hot water, the compact size (carry-on luggage size) of these units save home space, and is also environmentally friendly!


  • Save 60% on your utility bills
  • Reduce Carbon Dioxide
  • Save space and improve home aesthetic
  • Increase twice the lifespan of your water system (20 yrs)
Arnett's Water Systems


CALL US TODAY AT (619) 223-1209

arnett’s water systems now offers mobile hot water for events, disasters, and emergencies.
We Bring Hot Water To You While We Conduct Installation And Repairs.

Don't Have HOT WATER?

We know what it’s like to stress when business comes to a halt because of something so simple as not having hot water available for your home or business. Disasters can happen at any time and equipment can break, even after hours. Emergency services may not readily be available when or where you need them, and precious business hours may be lost completing the repairs.

Arnett’s Has The Solution

Invented by owner Erik Arnett, our new MobileHot Water Heater is a one-of-a-kind service that brings you direct access to hot water — whenever and wherever you need it.

Now you can have unlimited hot water for your home, business, or special event. Arnett’s Mobile Hot Water Heater can provide you with hot water while your equipment is being installed or repaired.

Don’t risk losing time, money, or your good reputation if your hot water is out — just call Arnett’s!

tankless water heater san diego repairs and service

Arnett’s Membership Program

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.


If you’re considering having a tankless water heater or a water filtration system installed into your home or business, just give us a call and schedule a visit. We’ll be happy to assist you and your family!

10% OFF for Active Military and VeteransCLICK HERE TO REDEEM COUPON

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Understand the Difference between Conventional Tanks and the Tankless Water Systems

Water Filtration

The Naiad water filtration is designed to function as a low-maintenance, fully automated water system. This filtration system eliminates hard-water, contaminants, and acts as a softener or conditioner to provide the purest, highest quality of water for your entire household. The system requires no salt (most filtration softener uses sodium), magnets or pre-filters. It protects your home by reducing scale and plumbing corrosion, and especially, harmful chemicals such as Chlorine and similar contaminants.

Hard water is typically visible through white stains on your shower heads and faucets. Hard water stain is an indication that your household water has excessive sediments, either calcium and magnesium or both. Although not seen by the naked eye, the deposits in hard water are abrasive and causes damage to household pipes. Hard water is not ideal for drinking water, and causes the following health and water quality issues as well:


  • Itchy, Dry Skin
  • White spots or stains on faucets and plumbing fixtures
  • Grimy and heavy feel on clothing after machine wash
  • Decreased water pressure due to clogging and sediment build-up
  • Spotty dishes and glassware

The Naiad water softening system naturally breaks down these hard water sediments and transform water into soft, high-quality drinkable water!

Benefits of Complete Household Water Softeners

  • Dishes, glasses, and clothing are cleaner, shinier
  • Effortless and robust soap lathering
  • Softer fabrics
  • Softer hair and skin
  • Can be installed nearly anywhere and are available in all shapes and sizes
  • Increased longevity of pipes and plumbing system

Contact Arnett’s Water Systems now and install Naiad Water System for your entire house! You won't regret it.

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.

Google User

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