Repiping in Corona, CA

Clues it is time for new lines

• Pinhole leaks that keep returning on copper runs
• Green or white crust building up around joints and valves
• Showers that weaken whenever the washer or a toilet fills
• Repair couplings already spliced into several lines
• Ceiling or wall stains below a bathroom with no obvious drip

Corona water and pipes

The City of Corona Utilities Department supplies water across the city. Its 2026 Consumer Confidence Report lists average hardness of 146 mg/L, about 8.5 grains per gallon, and classes the water as hard, with a wide range from 7.2 to 290 mg/L depending on source. The utility disinfects with chloramines. Scale from hard water collects at valves and fittings over the years, so ask how each pipe option handles it.

Corona's utility says its service line inventory found no lead lines and no galvanized lines requiring replacement, and it asks customers to notify it before altering or replacing a service line. That inventory is about the line feeding your property, not the copper or galvanized pipe inside your walls.

The city also notes that pressure regulators are the customer's responsibility to replace. A repipe is a sensible time to have the regulator checked, since high pressure is hard on new and old pipe alike.

Corona's housing ranges from the older blocks around the historic Grand Boulevard circle and the South Main Street Palms District to hillside tracts in Sierra Del Oro and Eagle Glen. Original pipe has had the longest to wear in the oldest neighborhoods.

Most Corona houses sit on concrete slabs, which shapes how the work is done. Rather than breaking up floors to reach the original under-slab lines, a plumber typically runs new pipe through the attic and drops it down interior walls to each fixture. The old lines are capped and left in place. That approach also ends the risk of a future slab leak on the abandoned pipe.

What drives the cost

• Square footage and the number of plumbing fixtures
• Attic space and access for routing new lines over a slab
• Choice of PEX or copper
• Patching, paint and texture after the work
• Extra items such as a new regulator or shutoff valves

After you call

You will be connected with an independent local plumber serving Corona. Expect questions about the age of the house, the pipe you can see and where leaks have appeared. The City of Corona Building Division handles permits and inspections, with applications and inspection requests through eTRAKiT.