1.GAL, Engineering Specification: The Aquaflush valve is a diaphragm operated brass flush valve with polished chrome exterior. The valve incorporates a non-holdopen low force/ADA compliant handle and a 3/4" [19mm] screwdriver operated angle stop valve with siphon-gard backcheck protection. The valve is furnished complete with a cast wall flange with setscrew, sweat solder kit, vandal-resistant control stop cover, vacuum breaker, 3/4" [19mm] flush tube, fixture spud escutcheon, and fixture spud securing nut.