The first decision after a pipe lets go is which valve to close. In La Verne, city code says shutoff valves, curb stops and corporation stops are installed by and for the city, while a valve the city places on the owner's side of the meter becomes the owner's to maintain and replace, so the first step is finding the right one.
Know which valve is which
A fixture valve under a sink or behind a toilet stops one fixture. The home's main shutoff stops the whole house. The meter itself stays city property, and the Water and Utility Division reads and maintains the meters. A valve that has not moved in years can seize, so testing it before an emergency saves a scramble during one.
What the wall needs once the water stops
Water from a split pipe runs down inside the wall and soaks insulation, the bottom plate and the back of the drywall. The crew extracts the surface water, cuts the drywall high enough to reach the wet area and removes insulation that has absorbed water.
- Wet insulation removed from the bays
- Drywall cut above the highest wet reading
- Baseboards pulled for airflow
- Framing dried before the wall is closed
Air movers and a dehumidifier then run in the open cavity until the studs and bottom plate read dry, and only then is the wall rebuilt. For floors that took the runoff, water extraction covers the pump-out.
Paperwork that helps the claim
Photos of the wet wall before tear-out, a list of removed materials and the daily readings give the adjuster a clear file. The plumber's invoice for the repair belongs in the same folder.