WPW10077881 / W10077881 Dishwasher Rinse Aid Dispenser Cap - Pack of 2

Key Features

• High-Temperature Structural Polymer: Manufactured from a specialized, heat-stabilized plastic designed to withstand the intense thermal cycling of "Sani-Rinse" and "Heated Dry" cycles without warping or becoming brittle.
• Integrated EPDM Rubber Seal: Features a high-performance internal rubber gasket that creates an airtight and watertight seal, preventing rinse aid from leaking into the tub prematurely or water from diluting the reservoir.
• Precision Twist-Lock Interface: Engineered with a standardized locking tab system that provides a secure, friction-lock fit with the dispenser housing, ensuring the cap remains seated during high-pressure wash cycles.
• Enhanced Surface Grip: Designed with deep circular notches along the perimeter, making it easy to twist open or close even when your hands are wet or soapy during kitchen cleanup.

Replaces / Cross-Reference Part Numbers

• Primary Part: WPW10077881, W10077881, WPW10077881VP.
• Industry Standards: AP6014865, PS11748135.

Compatibility & Fitment

This dispenser cap is the standard replacement for the rinse aid reservoir of most Whirlpool-manufactured dishwashers produced after 2008. Key compatible brands include:

• Whirlpool & Maytag: Fits hundreds of WDT, WDF, and MDB series models (e.g., WDT720PADM, MDB4949SHZ).
• KitchenAid & Jenn-Air: Compatible with various KDTM, KDTE, and JDT series high-end units (e.g., KDTE104ESS, KUDC10FXSS).
• Kenmore (665 Series): Fits many 665-prefix "Elite" and standard dishwashers (e.g., 665.13263K311, 665.1573291).
• Amana & Estate: Direct fit for dozens of ADB and DU series models utilizing the WPW10077881 style.
• Note: This cap is specifically for the Rinse Aid Reservoir located on the inner door panel. It is not for the detergent door latch or the bottom sump filters.

When to Replace

• Rinse Aid Leaking: You see blue or clear liquid streaks running down the inner door panel after closing the door, indicating the gasket has flattened or cracked.
• Cap Won't Stay Locked: The plastic tabs on the underside of the cap have snapped or worn down, causing the cap to pop out during the wash cycle.
• Cloudy Glassware: If the cap is loose, the rinse aid may be washed away too early in the cycle, leading to spots, film, and poor drying results.
• Visible Heat Damage: The cap looks yellowed, brittle, or deformed after years of exposure to the dishwasher's heating element.
• Missing Cap: The original cap was lost or accidentally discarded, leaving the reservoir open to water dilution and contamination.

Installation Tips

• No Tools Required: This is a simple "twist and lock" replacement. Ensure the dishwasher is off and the inner door panel is dry before starting.
• Clean the Opening: Before installing the new cap, use a damp cloth to wipe away any old rinse aid residue or mineral scale from the threads of the dispenser housing.
• Check the Gasket: Ensure the black rubber gasket is seated flat against the underside of the new cap. If the gasket is twisted, the reservoir will leak.
• The "Quarter-Turn" Lock: Insert the cap into the opening and turn it clockwise until it stops. It should feel snug and flush with the dispenser housing. Do not over-tighten, as the plastic tabs can snap.
• Refill and Test: This is the ideal time to top off your rinse aid. After refilling, lock the cap and run a quick rinse cycle to ensure there is no leakage from the reservoir.