Tankless Water Heater Installation in San Francisco, CA

installing a tankless water heater

Smarter Hot Water Solutions Start Here with Tankless Water Heaters

When you’re ready to enjoy endless hot water and energy efficiency, upgrading to a tankless system is the way to go. At Heise's Plumbing, we specialize in Tankless Water Heater Installation and Repair in San Francisco, CA, and surrounding areas. Whether you’re replacing a bulky old tank or need fast repairs on your current system, our licensed team delivers precise, reliable service that keeps your hot water flowing.

Call us today at (415) 333-0704 to schedule tankless water heater service!

Why Go Tankless with Us?

Tankless water heaters aren’t one-size-fits-all—you need a professional who understands sizing, installation codes, and long-term performance. At Heise's Plumbing, we’ve worked with every major brand and model, so you get tailored solutions backed by experience. We install, maintain, and repair both gas and electric tankless units, ensuring optimal function for years to come.

We also know that time without hot water can disrupt your entire household. That’s why we show up promptly, work cleanly, and always communicate clearly—no surprises, just results.

Expert Work with Real Benefits

Tankless systems are growing in popularity for good reason. They’re compact, efficient, and built to last. If you’re unsure whether tankless is right for you, we’re happy to help you compare options and make an informed decision.

Our tankless water heater services include:

  • New tankless water heater installation (gas or electric)
  • System replacements and upgrades
  • Flow rate and sizing assessments
  • Manufacturer-approved repairs
  • Annual descaling and preventative maintenance
  • Emergency hot water troubleshooting

Benefits of going tankless:

  • Endless hot water on demand
  • Up to 30% more energy efficient than tank models
  • Longer lifespan (20+ years with proper care)
  • Space-saving design for tight areas
  • Reduced risk of leaks or water damage

Contact Us for Lasting Comfort

Tankless water heaters are a smart investment—but only when installed and serviced by qualified pros. Whether you’re upgrading or in need of a fast repair, Heise's Plumbing is your trusted source for Tankless Water Heater Installation and Repair in San Francisco, CA, and surrounding areas.

Call us now at (415) 333-0704 to get expert help with your tankless water heater!

Most Recent Pins (5)

Heises Plumbing
HEISES PLUMBING replaced a 40-gallon tank water heater with a high-efficiency tankless system in San Francisco, California. The team installed an expansion tank, updated connections, and ensured the system met plumbing and safety standards. This upgrade improves hot water availability, lowers energy use, and increases usable space in the home.
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40-gallon water heater with metal strapping installation
40-gallon water heater with metal strapping installationTankless water heater with expansion tank in basement
Heises Plumbing
Heises Plumbing repaired a shower faucet by replacing a damaged cartridge in San Francisco, California. Technicians also installed a user-supplied condensate neutralizer on the tankless water heater’s condensation line. Both systems were tested after service and are functioning as expected.
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Condensate Neutralization Kit Box with Specifications
Condensate Neutralization Kit Box with SpecificationsCondensate Neutralization Kit with Capsule and FittingsCondensate Neutralization Capsule with Replacement Media
Heises Plumbing
Heises Plumbing replaced a tankless water heater at a San Francisco, California residence. The team removed the old unit, installed a new system using copper fittings and valves, bled the lines to clear air, and tested all connections for proper function. The installation met all operational standards.
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Tankless water heater with copper and brass fittings
Tankless water heater with copper and brass fittingsTankless water heater control panel at 120°FTankless water heater vent and piping installationTankless water heater with copper piping installationTankless water heater copper supply lines and valves
Heises Plumbing
A technician in San Mateo, CA repaired a Navien tankless water heater that had stopped producing hot water. The service included correcting a gas supply issue, rerouting the condensation drain line, and resetting the system. The unit resumed normal function and delivered consistent hot water the same day.
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Navien tankless water heater with gas and drain pipes
Navien tankless water heater with gas and drain pipesNavien tankless water heater energy guide labelNavien tankless water heater gas and drain pipesCN2-220V Condensate Neutralizer Inlet LabelNavien tankless water heater gas and drain fix
Heises Plumbing
Heises Plumbing replaced an outdoor tankless water heater in Burlingame, California. The team installed new isolation valves, ran a new gas line, completed pressure testing, and hard-wired the electrical connection. They verified proper operation and confirmed hot water flow with no leaks detected.
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Tankless Water Heater with New Gas Line and Valves
Tankless Water Heater with New Gas Line and ValvesTankless water heater copper piping and valves installationTankless water heater with new gas line and valves
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