California plumbing is shaped by earthquakes, drought rules and an enormous variety of housing. State plumbing code requires water heaters to be strapped to resist earthquake movement, and California’s efficiency standards limit the flow rates of new toilets, showerheads and faucets.
Many Southern California homes are slab-on-grade with copper supply lines under the floor, so slab leaks are common, and much of the region has hard water. In the Bay Area, older homes have galvanized supply and clay sewer laterals, and some East Bay cities require private sewer lateral inspection or certification when selling or remodeling.
Plumbing services we provide in California
These are the services California homeowners call about most often, based on the conditions above.
Leak Detection
Leak detection is the process of locating a hidden water leak, in a wall, ceiling, slab or underground line, with as little demolition as possible.
Leak Detection details →
Water Heater Replacement & Installation
Water heater replacement removes an existing heater and installs a new one sized and connected to current code, including venting, gas or electrical, relief valve piping and any required expansion tank.
Water Heater Replacement & Installation details →
Sewer Line Repair
Sewer line repair fixes damage to the building sewer or lateral, the pipe that carries wastewater from a house to the public sewer main or septic system.
Sewer Line Repair details →
Water Softeners & Filtration
Water treatment in a home includes water softeners, which remove hardness minerals, and filtration systems, which reduce specific contaminants, sediment, chlorine or odors.
Water Softeners & Filtration details →
Pipe Repair
Pipe repair is fixing a damaged section of a home's water supply or drain piping, from a pinhole leak or failed fitting to a split caused by freezing.
Pipe Repair details →Local conditions that affect plumbing in California
Seismic water heater strapping
Water heaters must be braced or strapped to resist earthquake movement; replacements should include compliant strapping.
Slab leaks in Southern California
Copper lines under slabs develop pinhole leaks; rerouting through attics or walls is common after repeated leaks.
Hard water
Colorado River and State Water Project supplies are hard in much of Southern California, scaling heaters and fixtures.
Sewer lateral ordinances
Some Bay Area communities require lateral inspections or replacement at sale or remodel.
City plumbing guides in California
Plumbing in Fresno
Central Valley heat, hard groundwater supplemented by treated river water, homes that were unmetered until 2013, older clay laterals and California seismic rules.
Fresno guide →
Plumbing in Los Angeles
Slab foundations with copper slab leaks, moderately hard to hard imported water, seismic water heater strapping, hillside homes and drought-era water rules.
Los Angeles guide →
Plumbing in Oakland
EBMUD’s very soft Mokelumne water, a regional sewer lateral certification rule, Victorian and hillside homes, and seismic and wildfire-interface concerns.
Oakland guide →
Plumbing in Sacramento
The City of Trees: roots in older laterals, a combined sewer system in the central city, levee-protected neighborhoods, newly metered homes and hot summers.
Sacramento guide →
Plumbing in San Diego
Very hard imported water, slab foundations and copper pinhole leaks, seismic strapping, coastal salt air and drought-era water efficiency.
San Diego guide →
Plumbing in San Francisco
Victorian and Edwardian housing, owner-responsible sewer laterals to the main, a mostly combined sewer system, soft Hetch Hetchy water and seismic rules.
San Francisco guide →
Plumbing in San Jose
Hard groundwater blends, mid-century slab and Eichler homes, seismic strapping, and drought-era water efficiency.
San Jose guide →
Plumbing in Anaheim
1950s–60s slab tract homes with galvanized supply and cast iron drains, hillside homes in Anaheim Hills, Anaheim Public Utilities, and hard water.
Anaheim guide →
Plumbing in Glendale
1920s–50s homes on flat and hillside lots, Glendale Water & Power, seismic requirements, clay laterals and many apartments and condos.
Glendale guide →
Plumbing in Irvine
Master-planned villages from the 1970s onward, HOAs, copper pinhole leaks, Irvine Ranch Water District’s extensive recycled water system, and hard water.
Irvine guide →
Plumbing in Long Beach
1920s–50s Craftsman and Spanish homes, coastal neighborhoods with a high water table, a city-run water, gas and sewer utility, hard water and seismic requirements.
Long Beach guide →
Plumbing in Pasadena
Historic Craftsman homes with original plumbing, mature trees and clay laterals, foothill neighborhoods, Pasadena Water and Power, and seismic code requirements.
Pasadena guide →- Leak Detection in Los Angeles
- Water Heater Replacement & Installation in Los Angeles
- Sewer Line Repair in Los Angeles
- Water Softeners & Filtration in San Diego
- Water Heater Repair in San Diego
- Leak Detection in San Diego
- Sewer Line Repair in San Francisco
- Pipe Repair in San Francisco
- Water Heater Replacement & Installation in San Francisco
- Leak Detection in San Jose
- Water Heater Replacement & Installation in San Jose
- Water Softeners & Filtration in San Jose
- Sewer Line Repair in Long Beach
- Sewer Line Repair in Pasadena
- Water Heater Repair in Glendale
- Sewer Line Repair in Glendale
- Pipe Repair in Anaheim
- Water Heater Repair in Anaheim
- Leak Detection in Irvine
- Sewer Line Repair in Sacramento
- Leak Detection in Sacramento
- Water Softeners & Filtration in Fresno
- Sewer Line Repair in Fresno
- Sewer Line Repair in Oakland
- Pipe Repair in Oakland
Plumbing emergency in California?
- Shut off the main water valve if water is leaking or a pipe has burst.
- Keep away from water near outlets, cords or the electrical panel.
- If sewage is backing up, stop using every drain in the house.
- If you smell gas, leave the building and call the gas utility or 911 from outside.
California plumbing questions
Does my water heater need earthquake straps in California?
Yes. California plumbing code requires water heaters to be strapped or braced to resist seismic movement, and inspectors check this on replacements.
Why are slab leaks so common in Southern California?
Many homes have copper supply lines beneath concrete slabs. Over time, water chemistry, abrasion and soil movement cause pinhole leaks under the floor.
Do California water heaters need earthquake straps?
Yes. California requires water heaters to be braced or strapped, and flexible gas connections are standard on replacements.
Do California cities require sewer lateral inspections?
Some cities and sewer districts, particularly in the Bay Area, require lateral inspection or certification when a home is sold or remodeled. Check local rules before listing.
Is California water hard?
Southern California and the Central Valley generally have hard water. Much of the Bay Area receives softer water from Sierra sources.
What are California’s fixture efficiency rules?
California sets strict maximum flow rates for toilets, showerheads and faucets, so replacement fixtures must meet state standards.
Are gas water heaters being phased out in California?
Some air districts have adopted rules that will require zero-emission water heaters for new sales in future years. Dates and details vary by region, so check your local air district.
Why are slab leaks common in California?
Many homes are on slabs with copper underneath, and hard water and soil movement, including seismic shifts, wear lines over time.