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How To Clean A Clogged Shower Valve Cartridge
Step 1: Remove handle and trim piece from the front of the valve body.
Step 2: Remove the bonnet nut.
Step 3: Tighten screws to stop water flow.
Step 4: With channel lock pliers or hex wrench, unthread the cartridge and remove from valve body.
Step 5: Soak the cartridge in white vinegar for an hour. Remove and rinse thoroughly in water.
Step 6: Open the cold water side of the valve to flush the opening. Turn the valve just enough to let the water flow gently. Use a large bucket to catch the water or direct the water down.
Step 7: Replace valve, tighten temperature stop, and reattach trim and handle.