All Moen showers do not use the same valve, as the company manufactures several distinct valve architectures tailored to different plumbing functions and safety codes. The most prevalent is the Posi-Temp pressure-balancing valve for standard showers, but Moen also produces Moentrol valves with volume control capabilities, M-Core universal modular valves, and specialized two-handle mixing valves. Because these different valve types require specific matching cartridges, you must identify your exact valve model before purchasing replacement internal components.
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