1203764 Canister Flush Seal Compatible with Kohler Dual Flush Toilets

Key features

• Part Number and Size5Pack 1203764 flush valve seal gasket set with an approximate 1.75 in inner diameter. Compatible with Kohler toilet tank systems using the 1203764 flush valve seal design, also compatible with Kohler K-4137, K-4147, and 1207982 related flush valve seal applications. Please compare your original seal shape and tank model before purchase.
• Toilet Tank CompatibilityCompatible with Kohler dual flush toilet tank systems that require the 1203764 seal structure. Designed for residential toilet tanks using the matching flush valve sealing configuration. Not all toilet tank valves use the same gasket design, so confirm the flush valve type before ordering.
• White Silicone MaterialMade from flexible white silicone material for toilet tank water exposure and repeated flush cycles. The material helps maintain elasticity, compression recovery, and sealing contact over time, reducing the risk of hardening, cracking, or deformation in continuous water-use environments.
• Install LocationInstalled inside the toilet tank between the flush valve and tank outlet opening. This gasket forms the sealing interface at the water discharge area of the tank assembly, helping the flush valve hold water when the toilet is not flushing.
• Leak Repair and Water Saving Helps replace worn, flattened, aged, or deformed flush valve seals that may cause continuous running, slow tank leakage, automatic refilling, weak flush performance, or unnecessary water waste. Suitable for toilet leak repair, water-saving maintenance, and helping reduce leak-related utility costs without replacing the full flush valve assembly.

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