Tankless installation and repair in Los Angeles
We install, repair and descale gas tankless heaters in houses, condos and apartment units across Los Angeles: Craftsman bungalows in Highland Park and West Adams with the heater on a back porch or in a closet, postwar ranch houses in Van Nuys and Encino with the heater in the garage, hillside homes in the Hollywood Hills with long runs to the bathrooms, and condos in Westwood and Koreatown where the heater shares a closet with the furnace. Sizing starts with how much hot water the household can draw at once and with how many degrees the unit must add in winter, when supply water reaches the house at its coldest. A unit picked by the summer tap temperature falls short in January.
The gas line usually decides whether a house can take a tankless heater. In a 1920s bungalow or a 1950s ranch house, the gas pipe feeding the old heater was laid for a tank burner, a fraction of what a tankless unit draws at full fire. Hook a tankless burner to that pipe and it starves, throwing an ignition or flame code as soon as a second shower turns on. SoCalGas owns the service and the meter, and the piping past the meter is the owner's, so we size it for the burner's full input, pressure test any new section, and tell you before anything is bought if the meter itself looks too small, since a larger meter is a request to SoCalGas. The vent follows the manufacturer's instructions and clearances exactly, and a tankless heater never reuses the old tank's flue. Inside the city of Los Angeles the job goes on an LADBS permit, which we close after the inspection; other cities issue their own.
Repairs start with the code on the display. Most codes narrow the fault to a single part: a worn igniter, a flame rod coated with residue, a blocked vent or intake, an overheat lockout caused by scale, or a flow sensor that no longer notices water passing, and nearly all of them can be fixed. A cracked heat exchanger is the exception, and you will hear that plainly rather than be sold a patch. On hillside streets in Silver Lake, Mount Washington and the Hollywood Hills, where pressure from the main runs high, the pressure regulator gets tested too. A worn regulator passes the full pressure of the main straight to the heater and each faucet and valve downstream. No repair starts before you accept the written quote.
Scale, hard water and descaling
Hard water in Los Angeles carries dissolved calcium and magnesium that come out of solution when heated, and inside a tankless unit they settle on the heat exchanger. That crust insulates the metal from the flame: the burner works harder for the same temperature, the heater may rumble or pop when it lights, and overheat codes start showing up during an ordinary shower. Scale that stays put shortens how long the exchanger lasts. Recirculation adds to it, since the burner lights to hold the loop at temperature even with every tap closed.
A descale is ordinary upkeep, done in place. The plumber closes the isolation valves, hooks hoses to the service ports, and runs a mild acid solution through the exchanger with a small pump until the scale dissolves, then flushes it with clean water and cleans the inlet filter screen. On a heater installed without those valves, the job means cutting into the pipes, which is why every tankless heater we install gets them. In LADWP water, once a year is a sensible first interval, adjusted to what the first descale finds, unless the manufacturer asks for more often.
Signs your tankless heater needs service
- Hot water cools off when a second fixture or the washing machine starts
- An error code on the display and a burner that shuts down
- Water that is hot enough in August but lukewarm on January mornings
- Popping, rumbling or a high whine when the burner lights
- Shower temperature that drifts up and down without anyone touching it
- No descale in over a year, or no isolation valves on the water lines
Tankless or tank in a Los Angeles home
A tankless heater is not right for every house. It pays off when two showers and a dishwasher regularly overrun the tank, or where the floor space of a tank is worth getting back, as in a bungalow closet or a tight condo utility space. It makes less sense where little hot water is used, particularly when a bigger gas pipe would need to cross finished walls or a crawl space. In those homes a well-sized tank can be the smarter choice, strapped to the wall at two points against earthquakes, and with the outlet of its temperature and pressure relief valve run to a safe spot.
Only 36 percent of homes in the city of Los Angeles are detached houses, and in many apartments and condos the heater sits in an interior closet where the vent route decides what is possible. Running a new vent out through an outside wall may require sign-off from the association or the building owner, which we confirm with you before quoting. In long single-story houses and hillside homes, a recirculation pump matched to the heater often matters more to comfort than the heater choice. Tank replacements have their own page under water heaters. The recommendation comes before the quote, and you can call whenever it suits you.
What a correct installation includes
- Gas pipe sized for the burner's full input before a model is chosen
- Venting exactly as the manufacturer's manual specifies, clearances included
- Isolation valves on both water connections, ready for the next descale
- On condensing models, a condensate line that ends at an approved drain
- A unit sized for January tap water, not August
- New gas piping pressure tested, the permit (LADBS inside the city) signed off by the inspector, and the first firing measured for flow and temperature