Rules every California water heater follows
State law requires water heaters to be braced or strapped against earthquakes, typically with two straps anchored into wall studs. Replacing a heater requires a permit from the local building department almost everywhere in the state, and inspectors check the straps, gas connector, venting, relief valve discharge and, in many jurisdictions, an expansion tank.
Air districts set emission limits for gas water heaters. In the South Coast region around Los Angeles, Orange, Riverside and San Bernardino counties, those limits are especially strict, and the Bay Area has moved toward phasing out sales of new gas water heaters in the coming years. Heat pump water heaters are increasingly common as a result, helped by state and utility incentives that change often.
Water across the state
California's water varies enormously. Cities fed by Sierra snowmelt, such as San Francisco through the Hetch Hetchy system and much of the East Bay through the Mokelumne, get very soft water. Southern California cities that rely on Colorado River water through the Metropolitan Water District get hard water, often above 10 grains per gallon. Central Valley cities on groundwater, such as Fresno and Bakersfield, often have moderately hard to hard water with seasonal swings.
- Soft water areas: sediment builds slowly; anode rods still need checking.
- Hard water areas: flush tanks yearly and descale tankless units yearly or more.
- Groundwater areas: hardness can change between summer and winter as utilities shift wells.
Typical costs in California
Labor and permit costs in California sit above the national average, especially in coastal metros. Most repairs fall in the $175 to $650 range, and a standard 40 to 50 gallon gas tank replacement usually runs $1,800 to $3,800 including the permit, straps and code items. Tankless and heat pump installations vary widely with gas line, electrical and venting work. See water heater replacement for what drives the price.
Where California water heaters are installed
Garages are the most common location in suburban homes from San Diego to Sacramento. Older homes in Los Angeles, the Bay Area and Sacramento often use exterior closets. Apartments and condos tend to have small tanks in interior closets, which makes replacements slower. In hot inland areas, attic installs exist but are less common than in Texas or Arizona.
Each city page below covers the local water source, the problems plumbers see most, and price and permit notes for that city.