Available in multiple connection sizes and capacities, these water hammer arresters control shock pressure in water lines from surges during quick valve closures. They are installed in hot and cold water lines in a 2” x 4” (50.8 x 101.6 mm) space in new construction or renovation or at any angle to accommodate structural limitations. Maintenance free once installed, they are delivered factory charged and are perfect for placement in office, institutional and public buildings.