Oatey Quiet Pipes® Hammer Arrestors help solve current and potential water hammer problems. Oatey Quiet Pipes® Hammer Arrestors silence banging pipes by absorbing the shock after a change in water flow. Oatey offers Hammer Arrestors for multiple or single fixture installations ranging in sizes from AA through F. Oatey Hammer Arrestors accommodate pipe connections which include CPVC, 1807 PEX, 1960 Uponor, Copper (Sweat and Press), Male Iron Pipe and Compression applications. Oatey Hammer Arrestors are gas filled and can be installed at any angle without affecting performance.