Sloan naval 120 xyv factory set (3.5 gpf) exposed water closet flushometer,less vacuum breaker,for floor mounted 1-1/2″ back spud bowls. Especially suited for harsh water conditions. 1″ i.p.s. Screwdriver bak-chek angle stop ada compliant metal oscillating non-hold-open handle handle packing,stop seat and vacuum breaker molded from permexrubber compound for chloramine resistance valve less vacuum breaker adjustable tailpiece self-cleaning xpelor bypass spud coupling and flange for 1″ back spud ultra high copper,low zinc brass castings for dezincification and salt water resistance less vacuum breaker vandal resistant stop cap stamped wall flange