Flushmate Replacement System for 501-B Series with Pushbutton Tank

Flushmate System 1.6 GPF Replaces 501-B Series for Toilet Tanks With Center Pushbutton. Designed to fit tanks with 3 in. Discharge Hole. Replacement system for all barrel shape vessels.|Direct replacement for obsolete 501-b series|Fits all OEM tanks equipped with 501-B, OR 501-A series|5 year limited warranty|Easy to install|Complete with mounting hardware for toilet tank|Direct replacement system for obsolete systems and serial numbers -F3B