Hattersley ball valves are compact, lightweight quarter-turn isolation valves made for reliable, long-service use; they provide full bore flow with minimal turbulence when open and a bubble-tight seal when closed. The valves typically feature dezincification-resistant (DZR) brass bodies, WRAS-approved seats and seals, O-ring backups for leak protection, and options for various handle types (lever, T-handle, extended stem, lockshield) and end connections (threaded or compression).