Zurn model# ZEMS6200-HET.0001 is a 1.28 GPF Metroflush exposed hardwired AquaSense flush Valve for water closets. The Metroflush valve is a piston operated brass flush valve with a polished chrome exterior. The valve is ADA compliant and incorporates a motorized actuator, an integral infrared convergence-type proximity sensor and a manual push-button override into all-metal, polished chrome plated housing. Complete with Zurn's MetroVantage chloramine resistant piston with a clog resistant filtered by-pass, high back pressure vacuum breaker, 1-piece hex coupling nut, adjustable tailpiece, spud coupling and flange for top spud connection. Control stop has internal siphon-guard protection and a wall flange with set screw. Internal seals are made of chloramine resistant materials.