Hard water and older valves
Fixtures in La Mirada homes deal with hard water every day. Minerals build up on toilet fill valves, faucet cartridges and shower valve seats, so seals stop closing cleanly and parts stick. In older houses the original shower valve may be decades old, and the stop valves under sinks and behind toilets may not have been turned in years.
That combination means a small repair can grow. A plumber who replaces a cartridge may suggest replacing a stiff angle stop at the same time, because a valve that will not close makes every future repair harder.
Common problems by fixture
| Fixture | Problem | Usual cause |
|---|---|---|
| Toilet | Runs or refills on its own | Worn flapper or fill valve |
| Toilet | Water on the floor at the base | Failed wax ring or loose closet bolts |
| Toilet | Weak flush | Scale in rim holes or a partial clog |
| Shower | Drips after shutting off | Worn cartridge or valve seats |
| Shower | Temperature swings | Failing pressure-balance cartridge |
| Faucet | Drip from the spout | Worn cartridge or washer |
| Faucet | Leak under the sink | Loose supply line or worn connection |
| Disposal | Hums but does not turn | Jammed flywheel |
| Disposal | Leaks underneath | Failed seal or cracked housing |
Safe things to check yourself
- Put dye in a toilet tank to see whether the flapper leaks.
- Unscrew and soak a faucet aerator or showerhead in vinegar to remove scale.
- For a humming disposal, switch it off and unplug it or turn off its breaker, then use the hex key in the bottom to free the flywheel.
- Press the reset button on the bottom of the disposal after clearing a jam.
- Tighten a loose supply line nut gently by hand, then a quarter turn with a wrench.
Fix it yourself or call a plumber?
- IfA flapper or aerator needs replacingThenUsually a simple homeowner job.
- IfThe shower valve drips and you cannot find a matching cartridgeThenCall a plumber; older valves may need parts identified or the valve replaced.
- IfWater appears at the base of the toiletThenCall soon; leaks there can damage the subfloor.
- IfThe angle stop will not close or leaks when turnedThenClose the main and have the stop replaced.
- IfThe disposal leaks from its bodyThenReplacement is usually more practical than repair.
Questions to ask on a fixture repair visit
- Can this be repaired with a part, or does the fixture need replacing?
- Should the stop valves be replaced while you are here?
- Is there anything in the drain or supply that caused this?
- Are the replacement parts matched to my existing fixture brand?
Common questions
Is a running toilet worth fixing right away?
Yes. A constantly running toilet can waste a large amount of water and is one of the most common reasons for a high bill.
Why does my shower get hot or cold suddenly?
Pressure-balance valves compensate when another fixture is used. If the cartridge is worn or scaled, it cannot keep up and the temperature swings.
Can a disposal handle any food scraps?
No. Avoid grease, fibrous scraps such as celery and corn husks, and large amounts of starchy food, which clog the trap and the drain line beyond it.
General information for La Mirada, not a quote or professional advice. In an emergency, call 911.