8558307 WP8558307 Dishwasher Rinse Aid Dispenser Cap - Pack of 2

Key Features

• High-Temperature Structural Polymer: Manufactured from a specialized heat-resistant plastic designed to withstand the intense thermal stress of "Sani-Rinse" and "Heated Dry" cycles without warping or becoming brittle.
• Integrated EPDM Rubber Seal: Features a pre-installed, high-performance rubber gasket that creates a watertight and airtight seal, preventing rinse aid from leaking out or water from entering the reservoir.
• Precision Twist-Lock Interface: Engineered with a standardized locking tab system that provides a secure, "click-to-lock" fit with the dispenser housing, ensuring the cap stays in place during high-pressure wash cycles.
• Ergonomic Finger-Grip Tab: Designed with a raised central rib that makes it easy to grasp and turn, even with wet hands or when wearing rubber cleaning gloves.
• Complete 2-Piece Maintenance Set: This value pack provides a primary replacement and a spare, ensuring you have a backup if the original cap is lost, cracked, or the gasket eventually degrades.

Replaces / Cross-Reference Part Numbers

• Primary Parts: 8558307, WP8558307, WP8558307VP.
• Legacy Cross-Reference: 8193984, 8539095, 916450.
• Industry Standards: AP6013204, PS11746426.

Compatibility & Fitment

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

• Whirlpool & Maytag: Fits hundreds of WDT, WDF, and MDB series models (e.g., WDT720PADM, MDB4949SHZ).
• Kenmore (665 Series): Compatible with dozens of 665-prefix "Elite" and standard dishwashers (e.g., 665.13263K311, 665.1573291).
• KitchenAid & Jenn-Air: Fits various KDTM, KDTE, and JDT series units (e.g., KDTE104ESS, KUDC10FXSS).
• Amana, Roper, & Estate: Direct fit for ADB and DU series models utilizing the 8558307 cap style.
• Note: Specifically for the Rinse Aid Reservoir located on the inner door panel. It is not for the main detergent compartment door.

When to Replace

• Rinse Aid Leaking: Blue or clear liquid streaking down the inner door panel, indicating the cap's internal gasket is cracked, flattened, or missing.
• Cap Won't Lock: The plastic locking tabs have snapped or worn down, causing the cap to pop out during the wash cycle.
• Visible Heat Damage: The cap looks yellowed, charred, or deformed after years of exposure to the dishwasher's heating element.
• Missing Cap: The original cap was accidentally thrown away or fell into the bottom of the tub and was damaged by the heating element.
• Cloudy Glassware: If the cap isn't sealing, the rinse aid may be diluted by wash water or dispensed all at once, leading to spots and film on your dishes.

Installation Tips

• No Tools Required: This is a simple "twist and lock" replacement. Ensure the dishwasher is off and the inner door is clean and dry.
• Clean the Reservoir Opening: Before installing the new 8558307 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 it is twisted, it will not create a watertight seal.
• The "Quarter-Turn" Lock: Insert the cap into the opening and turn it clockwise (usually about 1/4 turn) until it stops and feels snug. Do not over-tighten, as the plastic tabs can snap.
• Top-Off the Reservoir: This is the best time to refill your rinse aid. Filling the reservoir before locking the new cap ensures your next wash cycle will have the correct dosage for spot-free drying.