Exposed water closet flush-o-meter, for floor mounted or wall hung top spud bowls. Quiet, exposed, diaphragm type, chrome-plated closet flush-o-meter with the following features: Dual filtered bypass, diaphragm, handle packing, stop seat and vacuum breaker to be molded from Permex rubber compound for chloramine resistance, ADA compliant metal oscillating nonhold-open handle with a triple seal handle packing, 1" I.P.S. screwdriver Bak-Chek angle stop, free spinning vandal-resistant stop cap, adjustable tailpiece, high back pressure vacuum breaker flush connection with 1-piece bottom hex coupling nut, spud coupling, and flange for 1-1/2" top spud, sweat solder adapter with cover tube, and cast setscrew wall flange. 3.5 GPF (gallons per flush). Valve body, cover, tailpiece and control stop shall be in conformance with ASTM Alloy Classification for Semi-Red Brass, valve shall be in compliance to the applicable sections of ASSE 1037, ANSI/ASME 112.19.6, and Military Specification V-29193.