A Moen faucet or shower cartridge typically lasts between ten and fifteen years under normal residential operating conditions before rubber O-ring degradation, internal stem wear, or mineral scale buildup causes stiffness or dripping leaks. In homes supplied with hard water containing high concentrations of calcium and magnesium, mineral deposits accumulate much faster inside the valve housing, shortening the cartridge's operational lifespan. Because Moen replacement parts are accessible, swapping an aging cartridge restores factory-new performance.
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