Water heater repair in Redwood City, CA

A Yosemite reservoir behind every Redwood City faucet

Redwood City runs its own water department, but it does not treat river or well water itself. The city is one of the larger wholesale customers of the San Francisco Public Utilities Commission, and the water that reaches homes in Woodside Plaza or Palm Park mostly started as snowmelt held behind O'Shaughnessy Dam in Hetch Hetchy Valley. That supply crosses the Central Valley by gravity in the Hetch Hetchy aqueduct, and in some months the SFPUC blends it with water from its Bay Area reservoirs that has been filtered at plants such as Harry Tracy in San Bruno or Sunol Valley in Alameda County.

Because the mountain water passes over granite with almost nothing to dissolve, the tap water in Redwood City is soft. A tank that has run here for ten years usually holds only a handful of loose flakes at the bottom, which is far less than a comparable heater in the Central Valley would collect. That is good news for burners and for tankless heat exchangers, but soft water also tends to work the magnesium anode harder, and some local tanks lose their anode protection well before the jacket shows rust.

Redwood City has also built one of the Peninsula's bigger recycled water systems, which sends purple-pipe water to Redwood Shores medians, parks and some office campuses for irrigation. That network is separate from drinking water and never feeds a home heater, but it is a reason the city has some cushion during dry years when Hetch Hetchy deliveries are tight.

Downtown cottages, Mount Carmel bungalows and hillside ranches

The oldest housing sits in the blocks around Broadway and the Fox Theatre, in Stambaugh-Heller, and in Mount Carmel, where 1910s through 1940s bungalows and Craftsman homes line narrow streets. Water heaters in these houses often sit on a back porch, inside a converted laundry room, or in a detached single-car garage at the end of the driveway. A lot of these setups were rebuilt one piece at a time, so plumbers regularly find galvanized pipe spliced into copper, gas connectors that predate current code, and flue pipes passing too close to old framing.

Farm Hill, Canyon, Edgewood Park and the hills west of Alameda de las Pulgas are mostly 1950s through 1970s ranches and split-levels built on slopes. Here the heater is usually in an attached garage, sometimes on a lower level reached by stairs, so getting a full-size tank up or down those steps usually takes two installers. Roosevelt, Redwood Oaks and Friendly Acres on the flatter east side hold modest post-war homes, many with the heater in a hall closet or a garage alcove.

Emerald Hills, above the city near Edgewood Road, is a mix of incorporated streets and unincorporated county land. Homes there tend to be larger custom builds on steep lots with long gas runs. Further along, the neighborhood called North Fair Oaks is also unincorporated, which matters when it is time to pull a permit.

Redwood Shores: lagoons, levees and stacked condos

Redwood Shores was built on filled bay marshland starting in the 1960s, and its homes sit around a network of lagoons held back from the bay by levees. Much of the housing is townhomes, condos and mid-rise buildings, where a water heater might live in a small interior closet, a shared mechanical room or a tight garage nook. Replacing a tank in a third-floor unit can mean protecting finished floors along a hallway and coordinating with the homeowners association before the old heater ever moves.

A leaking heater in one of these buildings rarely stays a private problem, since water travels down to the unit below. Many Shores associations now ask owners to install a drain pan plumbed to a floor drain or outdoors, an automatic shutoff valve or a leak sensor. Because the neighborhood sits low beside the bay, ground-floor and garage heaters should also stand on a platform high enough to keep burners and controls dry if a storm and king tide push water past the drains.

Earthquakes and the Peninsula's wet winters

Redwood City lies a few miles east of the San Andreas fault, which runs along the Crystal Springs and Upper San Francisco Water Department lands west of Interstate 280. The fill soils of Redwood Shores and the bayfront are the kind of ground that shakes hardest in a strong quake. California code calls for two straps around each tank, positioned in the upper and lower thirds, and a flexible gas connector so the tank can move without snapping the line.

Atmospheric river storms in recent winters have flooded low streets near Redwood Creek and sent runoff into garages on the east side of El Camino Real. Where runoff got into a garage burner opening, keep the pilot dark until a technician inspects the unit, and plan on a new control valve rather than drying and reusing the old one.

What Redwood City plumbers repair most often

• Anodes worn down early on soft SFPUC water, especially in tanks past year six.
• Drips from relief valves and drain valves whose rubber seals have aged in chloraminated water.
• Upper-floor condo leaks in Redwood Shores that reach a neighbor's ceiling before anyone notices.
• Unstrapped or poorly anchored tanks in older Mount Carmel and downtown homes.
• Weak draft on long flue runs in hillside split-levels around Farm Hill and Canyon.
• Heat pump conversions that run into panel space limits in small 1950s garages.

Water heater prices in Redwood City

Labor on the mid-Peninsula is among the most expensive in California, and Redwood City sits squarely in that market. Condo jobs that require elevator reservations or HOA paperwork, steep Emerald Hills driveways, and tight downtown porch installs tend to land near the high end of each range.

Permits, inspections and contractor licenses

Within Redwood City limits, the Building Division of the Community Development and Transportation Department issues water heater permits. The inspection covers venting, combustion air, the gas connector and shutoff, seismic strapping, the relief valve discharge, and wiring when the new unit is a heat pump or electric tankless model. Homes in unincorporated Emerald Hills or North Fair Oaks fall under San Mateo County's Planning and Building Department instead, so check which jurisdiction appears on your property tax bill before work begins.

Heater work priced over $500, parts and labor together, must go to a contractor licensed by California's Contractors State License Board, and C-36 plumbing is the usual classification. Before agreeing to a quote, look the company up on the CSLB site, confirm it carries workers' compensation, and make sure the quote lists the city permit fee.

Peninsula Clean Energy and heat pump water heaters

PG&E delivers gas and electricity to Redwood City homes, and the power itself is purchased for most households by Peninsula Clean Energy, a public agency formed by San Mateo County and its cities. Both, along with statewide TECH Clean California funding, have backed heat pump purchases with rebates at times; offers come and go, so confirm the current one before ordering equipment.

A heat pump unit pulls warmth from the surrounding air, so it does well in a Redwood City garage that rarely drops below the mid-40s. It does need roughly 700 cubic feet of open air or a louvered door, a condensate drain, and usually a 240-volt circuit. In a Redwood Shores condo closet, a 120-volt plug-in model or a split system can sometimes solve the space problem when a standard unit will not fit.

Fix or replace in Redwood City

On soft Hetch Hetchy water, a gas tank that has had its anode swapped can often reach twelve years or more. For a Farm Hill or Roosevelt heater installed within the last seven years, replacing a dead igniter, sensor or valve normally costs far less than a new tank. When there is water on the floor from the tank body itself, when the unit is past eleven years, or when a leak would threaten a downstairs unit in the Shores, replacement makes more sense. Our guide to swapping out a tank walks through the process, and a separate page on drips and puddles helps tell a loose fitting from a failed tank.

Around Redwood City

San Carlos, just north, gets its water from California Water Service and handles its own building permits. Menlo Park to the south is split between its municipal water system and Cal Water, and its building division is separate from Redwood City's. Atherton relies on Cal Water's Bear Gulch district, while Woodside in the hills has its own town permit counter. Belmont buys SFPUC water through the Mid-Peninsula Water District, and unincorporated North Fair Oaks follows county rules.

Water heater questions from Redwood City