Washer Sink Basket Waste Only 90mm

The 90mm Sink Basket Waste Washer is a specialized replacement seal designed for large-aperture kitchen sink strainers. This rubber gasket sits between the underside of the stainless steel basket and the waste body, providing the critical watertight seal needed to hold water in the sink when the "click" or "push" mechanism is engaged.

Technical Specifications

• Diameter: 90mm (Fits standard 90mm/110mm sink waste units).
• Material: Heavy-duty Nitrile Rubber (NBR) or Black Silicone.
• Profile: Flat or slightly tapered (depending on the basket brand).
• Internal Aperture: Designed to fit securely over the center metal or plastic stem.
• Compatibility: Universal fit for most Franke, Kwikot, Pulse, and Wirquin 90mm basket strainers.

Key Performance Features

• Suction Integrity: The high-density rubber is engineered to compress under the weight of a full sink, ensuring no water leaks out into the drain during soaking.
• Chemical Resilience: Formulated to withstand constant exposure to boiling water, dishwashing detergents, and the mineral-heavy water of the Heidelberg - GP region.
• Pliability: Remains soft and flexible over time, resisting the "brittleness" that often occurs with cheaper rubber seals during the dry Winter Bulk 2026 months.
• Easy DIY Repair: This is a "Washer Only" replacement, allowing you to fix a leaking sink for a fraction of the cost of buying a complete 90mm Sink Strainer Basket.
• Hygienic Surface: The smooth, non-porous finish resists the buildup of slime and food particles, making it easy to clean with a quick wipe.

Installation & Professional Tips

• Stem Removal: Most 90mm baskets allow you to unscrew the center stem or remove a small retaining clip. Slide the old, perished washer off and clean the stainless steel base with a Shield Microfibre Cloth to remove any lime-scale.
• Seating the Seal: Slide the new 90mm washer onto the stem. Ensure it sits perfectly flat against the bottom of the stainless steel basket. If it is "bunched" or twisted, it will not create a vacuum.
• The "Vinegar Soak": If your sink still drips after replacing the washer, the "seat" inside the waste body may have lime-scale buildup. Soak the area in white vinegar for 10 minutes and scrub with a Kaufmann wire brush (plastic bristles preferred) to ensure a smooth mating surface.
• No Adhesive Required: Do not use silicone sealer or glue on this washer. It is designed to be a mechanical "friction" seal that can be easily removed for cleaning.
• Alignment: When dropping the basket back into the sink, ensure the stem is centered. If the washer is slightly off-center, the weight of the water can cause it to "flip" or leak.

Common Use Cases

• Kitchen Sculleries: Fixing sinks that "self-drain" over a period of 10–20 minutes.
• Maintenance Kits: An essential spare for the Kaufmann tool chest during the Easter 2026 facility checks.
• Food Prep Areas: Ensuring prep sinks can be filled for vegetable washing without constant water loss.

Pro Tip: If the rubber washer feels a bit stiff when you first take it out of the packaging, soak it in warm water for a minute before installing. This makes the rubber more "compliant," allowing it to mold instantly to the shape of your specific sink waste for a perfect seal on the first try.