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.

648

Black Overflow with Flapper about 2 1/2 inches wide

002

Black Overflow with Flapper about 3 1/2 inches wide

712002

White Overflow with Flapper about 3 1/2 inches wide