In San Marcos, worn cartridges and seals cause most faucet leaks, and high supply pressure or chloramine in the water can speed that wear. A plumber can rebuild the faucet or replace it, and can check whether your home needs pressure regulation. Call the number on this page to be connected with a local plumber in San Marcos.
San Marcos homes and their faucets
Vallecitos Water District supplies water and sewer service across San Marcos and Lake San Marcos. Its supply is imported through the San Diego County Water Authority plus desalinated seawater from the Carlsbad Desalination Plant, and the district disinfects with chloramines. The median home in San Marcos was built around 1994, younger than most of the county, so many faucets are original builder-grade single-lever models now reaching the age when cartridges give out.
What to do right now
- Stop the water. Turn the angle stops under the sink clockwise. If they leak or will not move, close the main shutoff for the house.
- Find where it leaks. Dry everything with a towel, run the faucet and watch: spout, handle, base or the hoses underneath.
- Check the aerator. If flow is weak, unscrew it and look for grit or scale.
- Listen for hammering or hissing. Banging pipes or a faucet that spits air can point to high pressure.
- Take photos. Capture the faucet, the brand logo and the valves below to share with the plumber.
Symptoms and likely causes
| Symptom | Likely cause |
|---|---|
| Drip from the spout | Worn cartridge, washer or valve seat |
| Water at the base of the spout | Failed O-rings on a swivel spout |
| Leak under the sink | Loose or worn supply line, or a seeping angle stop |
| Weak stream at one faucet | Clogged aerator or debris in the cartridge |
| Several faucets failing within a short time | Water pressure set too high for the home |
What affects cost
A cartridge or seal kit is usually the least involved fix. Cost rises if the faucet needs replacing, if the angle stops are seized, or if pressure turns out to be the root cause. Vallecitos says it installs a regulator on its side of the meter only where pressure exceeds 175 psi to protect the meter, and that regulator does not protect the customer's line. A pressure regulator on the house side, where one is needed, is the owner's responsibility. Vallecitos also notes that lines serving private property belong to the owner.
Planning a remodel? The City of San Marcos Building Division's residential permit packet includes a water-conserving fixture certificate. Homes built on or before January 1, 1994 must replace non-compliant fixtures, faucets among them, when that requirement applies.
Faucet Repair questions in San Marcos
Can high water pressure shorten the life of a faucet?
Can the chloramine in our tap water wear out faucet seals?
Will I need a permit to change a faucet here?
Can a pull-down or touch-activated kitchen faucet be repaired?
More plumbing services in San Marcos
Faucet Repair nearby
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