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Gerber Viper 28-590 Guide
The 28-590 Viper has changed several times. To get the right parts we need to know what flush valve you have.
Please select yours below.
Black Overflow with Flapper about 2 1/2 inches wide
Black Overflow with Flapper about 3 1/2 inches wide
White Overflow with Flapper about 3 1/2 inches wide
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