How to Install Dishwasher Sump w/Seal WP8572618 in a Whirlpool Dishwasher

Quick answer: Cut power and water, pull the Whirlpool dishwasher out and sponge the tub dry. Remove the spray arm and filter, release the pump and motor from under the sump, then unscrew the old sump from inside the tub. Seat WP8572618 with its new seal, tighten in a cross pattern, refit the pump and leak-test.

On Whirlpool-built dishwashers like the KUDC10IBSS0, GU2451XTST1, MDB7809AWW1 and the Kenmore 66513114K701, the sump is the plastic basin molded into the center of the tub floor. It holds the wash water below the filter screen, gives the circulation pump its intake, and carries the drain port. Part WP8572618 is the sump supplied with its tub seal, and it also replaces the earlier numbers W10056271 and W10728159. You replace it when the tub seal groove is cracked and water weeps under the machine, when the pump mounting ring is broken, or when a hose port has snapped off.

The job is best described as a pump-and-motor removal with a sump swap in the middle. The sump is fastened from inside the tub, but the pump assembly hangs beneath it, so the dishwasher has to come out and be laid back. Give yourself a few hours, photograph every hose and connector, and treat the new seal carefully; it is the whole reason this part is sold as a set.

See part details and every compatible model: WP8572618

⚠️ Safety First
  • Switch off the breaker and check the console is dead before opening the junction box.
  • Close the water valve and relieve pressure before loosening the inlet fitting.
  • Wear gloves; the tub flange and pump bracket edges are sharp.
  • Use a helper to pull and lay the unit back; never rest it on the open door.
  • Sponge the sump dry before tipping so water does not run into the door and controls.

Tools and Parts You Need

  • Torx and Phillips screwdrivers
  • 1/4-inch and 5/16-inch nut drivers
  • Hose clamp pliers
  • Adjustable wrench for the water inlet fitting
  • Sponge, towels and a shallow pan
  • Flashlight or headlamp
  • Painter's tape and marker
  • Work gloves

Step-by-Step Installation

  1. Disconnect and pull the dishwasher Kill power and water. Remove the kick panel, disconnect the supply, drain hose and junction box wiring, remove the counter mounting screws and slide the unit out onto a towel.
  2. Clear the tub floor Take out the lower rack, lower spray arm, and the filter screen and pump cover. Sponge all standing water out of the sump.
  3. Lay the unit back With a helper, ease the dishwasher onto its back on a padded surface. The pump and motor assembly is now visible mounted to the underside of the sump.
  4. Release the pump and motor Photograph the wiring and hoses. Unplug the motor connector, unclamp the drain hose and any heater or inlet hoses, and release the pump mounting ring or clips so the assembly drops away from the sump.
  5. Remove the old sump Return to the inside of the tub and remove the sump screws. Lift the sump out, taking the old seal with it. Clean the tub opening of scale and old seal material.
  6. Fit WP8572618 Confirm the new seal is seated in the sump groove without twist. Lower the sump into the tub opening squarely and start every screw by hand.
  7. Tighten and refit the pump Tighten the sump screws in a cross pattern until the seal compresses evenly. From below, remount the pump and motor, reconnect hoses with fresh clamps if needed, and plug in the motor.
  8. Reinstall and test Stand the unit up, slide it in, reconnect utilities and refit the filter, spray arm and rack. Run a full cycle with the kick panel off and watch the sump joint for leaks during fill and drain.

Fit Checks Before You Call the Job Done

  • The seal is seated in the sump groove all the way around with no twist.
  • All sump screws are tight in a cross pattern and the sump does not rock.
  • The pump mounting ring or clips are fully engaged and the motor connector is latched.
  • The filter screen and lower spray arm lock into the new sump.
  • The tub joint is dry through a complete fill, wash and drain.

Common Mistakes to Avoid

Reusing the old seal The new seal comes with WP8572618 for a reason. A hardened seal will weep within days.

Tipping with water in the sump Water floods the door and control board. Sponge it dry first.

Tightening screws in sequence around the ring This pulls the sump down unevenly and pinches the seal. Use a cross pattern.

Forcing the pump ring The mounting ring is plastic. Align it and turn it gently until it locks.

Kinking the drain hose during reinstall A kinked hose leaves water in the tub and mimics a sump problem.

Troubleshooting After Installation

Water under the dishwasher after the repair The seal is pinched or a hose clamp is loose. Pull the unit and inspect the sump joint.

Standing water in the tub Check the drain hose for kinks and the drain port on the sump for debris left from the swap.

Motor hums, no wash action The impeller is jammed or the pump ring is not locked. Verify the pump assembly is fully seated.

Loud rattling during wash A screw or clamp dropped into the sump. Remove the filter and check the impeller area.

Care Tips After the Repair

  • Clean the filter screen weekly to keep grit out of the pump.
  • Scrape plates before loading; hard debris cracks sump housings.
  • Run a monthly cleaning cycle to keep grease off the seal.
  • Check under the kick panel for moisture after the first few cycles.

Compatible Models (Sample)

This part is listed for 946 Whirlpool models in our fitment data. Always confirm your exact model number on the appliance's rating plate.

Replaces or is replaced by: W10056271, W10728159

Repair Difficulty and Time

Difficulty: Advanced. Typical time: 2 to 4 hours.

Frequently Asked Questions

Which dishwashers use sump WP8572618?

It is listed for Whirlpool-built dishwashers including the KUDC10IBSS0, KUDC10FXWH0, GU2451XTST1, GU2475XTVB0, MDB7809AWW1 and Kenmore 66513114K701.

Is this the same as W10056271?

Yes. WP8572618 replaces W10056271 and W10728159.

Does the sump include the pump or motor?

No. It includes the sump housing and its tub seal only. The pump and motor transfer from the old sump.

Can I do this without pulling the dishwasher out?

No. The pump assembly attaches beneath the sump and can only be released with the unit out of the cabinet.

Final Checklist

  • Breaker off and water valve closed
  • Unit disconnected and pulled out
  • Tub floor cleared and sump sponged dry
  • Pump and motor assembly released from below
  • Old sump removed and tub opening cleaned
  • WP8572618 seated with new seal and tightened in a cross pattern
  • Pump remounted and hoses reconnected
  • Unit reinstalled and leak-tested

Related Repair Guides