Los Angeles County · Los Angeles–Long Beach–Anaheim metro
Plumbing help in Los Angeles, CA
Hard WaterOlder Pipes
Los Angeles combines hard imported water with an older housing stock, and hardness depends on where in the city you live. That makes scale, aging pipe and fixture replacement the common thread in LA plumbing calls, along with California's water-efficiency rules for older homes.
- Median home built
- 1965
- Built before 1980
- 69%
- Owner-occupied
- 36%
- Water hardness
- Hard
- ≈ 8.6 grains/gal
- Winter
- Hard freezes are rare
- Plumbing code
- State code
What Los Angeles homeowners call plumbers about
- Water Heater Repair
Hard water, up to about 16 grains per gallon in parts of the city, builds sediment in tank heaters and shortens their life.
- Repiping
About two-thirds of LA housing predates 1980, and galvanized supply pipe in older homes causes low pressure and leaks.
- Toilet Installation
California requires older single-family homes to replace high-flow fixtures, and remodels trigger the requirement.
Emergency plumbing in Los Angeles
Call (833) 878-1592Shut off your main water supply if it's safe to do so. The emergencies below are listed most likely first for Los Angeles homes, based on local conditions.
Hard water in Los Angeles: what it does to heaters and fixtures
LADWP reports hardness varying by area: about 8.6 grains per gallon on average in the San Fernando Valley and western LA, 9.8 in Silver Lake, Downtown and South LA, and 16.3 in eastern LA and the Harbor, because the city blends several water sources. [1]
What's behind the walls of Los Angeles's older homes
The median home in Los Angeles was built in 1965, and 69% of homes predate 1980. Homes from that era were typically built with copper or galvanized supply, cast iron drains, clay or cast iron sewer laterals.
- Galvanized steel supply (1900–1960)
- Copper supply (1950–2000)
- Polybutylene (some homes) (1978–1996)
- PEX / CPVC (1995–today)
Permits and code in Los Angeles
Construction and plumbing code questions in the City of Los Angeles are handled by the Los Angeles Department of Building and Safety (LADBS), which enforces the city's plumbing code. [2]
Plumbing services for Los Angeles homes
Los Angeles plumbing questions
Is Los Angeles water hard?
It depends on the neighborhood. LADWP reports averages from about 8.6 grains per gallon in the San Fernando Valley to about 16.3 in eastern LA and the Harbor area.
Do I need to replace my toilets when remodeling in Los Angeles?
If the home is a single-family house built on or before January 1, 1994, permitted alterations require replacing noncompliant fixtures such as toilets over 1.6 gallons per flush. LADBS applies this at final inspection.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035) · checked 2026-10-01
- Los Angeles Department of Water and Power, Water Quality FAQs (2022 data) · checked 2026-10-01
- LADWP, State and City Plumbing Codes · checked 2026-10-01