A standard residential tub spout diverter or shower diverter valve typically lasts between 5 to 10 years before abrasive hard water mineral scale, rubber seal degradation, or spring fatigue compromises its operation. While regular descaling in white vinegar and silicone lubrication can extend its lifespan significantly, constant daily use eventually wears down the internal O-rings and diverter gate. Verification: Inspect and operate the diverter annually during routine home maintenance checks.
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