Tankless Water Heater Installation in Pico Rivera, CA

Tankless water heaters deliver a modern, energy-efficient way to enjoy hot water on demand — no more waiting for a tank to refill or worrying about running out. At Water Heater Genius, we specialize in the installation, replacement of an existing water heater, and setup of high-performance tankless systems from all major brands.

Our licensed technicians size the unit to your household's actual peak demand, then check whether the house can feed it. Gas line sizing is the usual gating item on a conversion — a tankless burner draws several times what a tank does, so the existing line is often too small and needs upsizing or a dedicated run from the meter. Add the new vent, the condensate drain, and a dedicated circuit on some models, and that is most of the difference in cost between a tankless conversion and a like-for-like tank swap. We check all of it before quoting.

Making the switch to a tankless water heater is one of the smartest home upgrades you can invest in. Not only do these systems provide endless hot water, but they also use up to 30% less energy than traditional tank models — saving you money every month.

At Water Heater Genius, we take care of everything from start to finish. We’ll remove your old unit, inspect your home’s plumbing and gas or electrical connections, and install your new tankless system for maximum efficiency. Our technicians take the time to explain how to use and maintain your new water heater, ensuring you get the best performance for years to come.

Whether you’re replacing an outdated tank or building a new home, our team delivers professional, code-compliant installations backed by honest pricing and reliable customer support.

A tankless water heater is sized by flow rate, gallons per minute (GPM), at a given temperature rise, not by gallons. Incoming water in Los Angeles County runs about 55°F to 60°F in winter, so a unit has to lift it 60°F to 65°F to reach 120°F. That is the number we size to, not the “max GPM” on the box, which manufacturers rate at a 35°F rise.

At that rise, this is what a household needs and the class of unit that delivers it:

The target flow is the fixtures that run at the same time during the busiest moment, added up:

We install every major brand, so here is what the common models actually deliver at a Los Angeles rise, from each manufacturer’s own sizing document. These are published outputs at the stated rise, not the spec-sheet maximum:

Two showers plus the washer is about 6 GPM, which is 199,000 BTU territory here. A larger home with four showers and a dishwasher running is around 10 GPM, which means two units. We run this math on your fixtures and gas line before we quote, and the book-price EZTR40 and EZTR50 conversions above are sized the same way.

Replacing a storage tank with a tankless unit has a book price when the new unit can use the existing hookups. Noritz makes two models for exactly that: the EZTR40 replaces a 40-gallon tank and the EZTR50 replaces a 50-gallon tank.

Add-ons and code items such as the permit, earthquake straps, a gas sediment trap and venting are priced separately on our pricing page. A second-level or indoor installation carries a $249 surcharge. Book prices apply during normal business hours, Monday through Friday, 8 AM to 5 PM; pricing outside those hours or in an emergency is subject to change. We take calls 24 hours a day, 7 days a week.

Every installation is backed by a 1-year Water Heater Genius labor warranty on all connections. The unit carries the manufacturer’s warranty on top of that: 12 to 15 years on the heat exchanger for most residential tankless units, and 25 years or 15,000 hours on the Noritz EZ series, which includes the EZTR40 and EZTR50 we install at book price. Other parts are usually covered for 5 years. Registering the unit with the manufacturer is the homeowner’s step, and the deadline matters (A. O. Smith and Rinnai both give 90 days), so we go over the exact terms and the registration step before the work starts.

Every one of those warranties carries the same three conditions: professional installation (Rheem and Rinnai both say an improper install can void it), annual descaling (scale damage is excluded by all of them), and no uncontrolled recirculation pump, which cuts the heat exchanger term to 3 to 5 years. The descaling condition is the reason we put a yearly descale flush on the calendar the day we install. The labor column is each manufacturer’s own coverage and is separate from our 1-year labor warranty, which applies whichever brand you choose.