Fresno County · Fresno metro
Plumbing help in Fresno, CA
Freeze RiskNewer Homes
Fresno used to rely almost entirely on groundwater and now blends in treated surface water. With about half of its homes built before 1980, hot summers and a large network of wells, aging pipe and water heater wear are common local calls.
- Median home built
- 1982
- Built before 1980
- 47%
- Owner-occupied
- 51%
- Water hardness
- See below
- Winter
- Occasional hard freezes
- Plumbing code
- UPC
The plumbing calls that come up most in Fresno
- Water Heater Replacement
Heaters in older homes reach end of life, and sediment speeds it up.
- Repiping
Older homes may still have galvanized supply lines that restrict flow and leak.
- Leak Detection
Slab-on-grade homes hide supply line leaks under floors.
Emergency plumbing in Fresno
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 Fresno homes, based on local conditions.
Plumbing code and permits in Fresno
Plumbing here follows the 2025 California Plumbing Code, based on the 2024 Uniform Plumbing Code, effective January 1, 2026; plumbing contractors hold a CSLB C-36 license. [2]
Where Fresno's water comes from
Fresno's water comes from groundwater, drawn from 271 metered wells, and surface water treated at facilities opened in 2004, 2015 and 2018, which have balanced the supply away from the aquifer. [1]
When Fresno gets a hard freeze
Occasional hard freezes · median home built 1982
Polybutylene-era homes in Fresno
The median home in Fresno was built in 1982, and 47% of homes predate 1980. Homes from that era were typically built with copper or CPVC supply, plastic drains, and in some homes gray polybutylene supply pipe.
- Galvanized steel supply (1900–1960)
- Copper supply (1950–2000)
- Polybutylene (some homes) (1978–1996)
- PEX / CPVC (1995–today)
Plumbing services for Fresno homes
Fresno plumbing questions
Where does Fresno's water come from?
A mix of groundwater from about 271 city wells and surface water treated at the city's surface water treatment facilities.
Which plumbing code applies in Fresno?
The 2025 California Plumbing Code, based on the 2024 Uniform Plumbing Code, effective January 1, 2026.
Do I have to upgrade fixtures when remodeling in Fresno?
For single-family homes built on or before January 1, 1994, California requires replacing noncompliant fixtures as part of permitted work.
How do I check a Fresno plumber?
Use the CSLB's Check a License search and look for the C-36 plumbing classification.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035) · checked 2026-10-01
- City of Fresno, Water Operations and Facilities · checked 2026-10-01
- IAPMO, 2025 California Plumbing Code · checked 2026-10-01