How to repair a disc faucet

Step-by-steps advices to replace Disc faucets or better, to replace the whole cylinder.

Tools and materials

  • slip-joint pliers
  • flat-head screwdriver
  • Allen wrench
  • rags
  • Phillips-head screwdriver
  • Replacement cartridge
  • plumber’s grease

Step 1: Remove the cylinder

After turning off the water at the shutoff, locate the set-screw and loosen it with an Allen wrench to remove the handle.

Under the handle is a decorative escutcheon cap that may screw or pop off. With the cap out of the way, remove the cylinder mounting screws and lift out the cylinder.

Step 2: Check for Debris, Damage or Wear

  • Check for debris, damage or wear. If the disc below the seal is dirty, try cleaning it with an abrasive kitchen pad, then rinse and replace it. If the seals are damaged, replace them.
  • Reassemble the faucet. Turn the faucet to the on position, then very slowly turn on the water at the shutoff valve so any trapped air escapes gradually. Otherwise a pocket of air might be forced under great pressure into the cylinder and could crack the discs.
  • Check for leaks.
 Step 3: Replace the Cylinder

If the faucet still leaks, one of the discs is probably damaged.

After step 1 and 2, turn the water off and remove the escutcheon cap and mounting screws, carefully lift the old cylinder out of the faucet body and drop in the replacement.

Step 4: Reassemble the faucet

  • Tighten down the mounting screws, replace the escutcheon cap, and reinstall the handle.
  • Turn the faucet to the on position, and slowly turn on the water supply at the shutoff valve to check for leaks.

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