Adjusting the water temperature limits on a Moen Posi-Temp valve is accomplished by modifying the plastic temperature limit stop device positioned on the exterior stem assembly. Remove the handle and decorative sleeve to access the valve interior. Locate the adjustable plastic stop ring, pull it slightly away from the valve housing, and reposition it to limit how far the handle can rotate toward the hot side. This allows homeowners to customize maximum water temperature output for child safety or comfort without replacing internal components.
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