Kohler Toilets manufactured prior to 2004 are most common with a 2-inch flapper. All two-piece toilets that have a 2-inch flapper use fill valve GP1138930.

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Kohler Toilets manufactured prior to 2004 are most common with a 2-inch flapper. All two-piece toilets that have a 2-inch flapper use fill valve GP1138930.
