How to Repair a Leak in a Delta Centerset Faucet


Delta manufactures both a single-handle and a two-handle model of its Centerset bathroom faucet line. A leak may occur in either model, and the first step in repairing a leak is troubleshooting to determine the exact source of the leak within the faucet. Knowing where to look for common leaks helps cut down the time diagnosing what is needed for a repair. Common locations for a leak from either a two-handle or one-handle model are leaks from beneath the handle and from the spout itself.

Things You'll Need

  • Phillips screwdriver
  • Adjustable wrench
  • Adjustable pliers
  • Needle-nose pliers
  • Replacement seats and springs
  • Replacement stem unit assembly
  • Allen wrench
  • Electrical tape
  • Replacement cam and packing
  • Replacement ball assembly

Two-Handle Leak Repair

  • Shut off the water to the faucet. Pry the cap off the top of the faucet handle, using your fingernail or a knife. Unscrew and remove the screw in the head of the handle, using a Phillips screwdriver. Lift off the faucet handle.

  • Unscrew and remove the locknut that holds the stem unit assembly in place, using an adjustable wrench, or pliers. Pull the Delta stem unit assembly from the faucet. Remove the two rubber seats and two metal springs found underneath the stem unit assembly, if the faucet leaks from the spout. Use a pair of needle-nose pliers. Install two new springs, and two new seats. The seats and springs are found in Delta repair kit RP4993.

  • Install a new stem unit assembly, being sure to properly align the tab on the assembly with the slot in the faucet body. The proper stem unit assembly repair part is Delta repair kit RP25513. Replace the stem assembly for either a leak from under the faucet handle or from the spout.

  • Install the locknut and tighten, using a wrench, until the locknut is snug. Press the handle onto the stem. Install the screw into the top of the handle, using a Phillips screwdriver, and install the cap on the handle.

One-Handle Leak Repair

  • Lift the handle and loosen the retaining screw that is in the base of the handle, using an Allen wrench. Pull the handle off. Wrap the jaws of a pair of adjustable pliers in electrical tape. Remove the faucet cap, using the pliers.

  • Lift the cam and packing, and the ball assembly out of the faucet body. Remove the seats and springs, revealed after removing the ball assembly, using needle-nose pliers. The proper replacement seats and springs are repair kit RP4993. Install new seats and springs. If the leak persists from the faucet spout after replacing the seats and springs, install a new ball assembly. The correct repair kit for the ball assembly is RP70.

  • Replace the cam and packing if the faucet leaks from beneath the handle. Align the tab on the side of the cam with the slot in the faucet body, and install the new cam and packing atop the ball assembly. The proper Delta repair kit for the cam and packing is RP61. Also, replace the ball assembly for a leak from beneath the handle.

  • Install and tighten the faucet cap, using the pliers. Press the handle onto the cap and tighten the screw in the base of the handle, using the Allen wrench.

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