LFSWA-500 Percision Plumbing Products Sweat-On Water Hammer Arrestor Precision Plumbing Products is again the first to offer a complete series, 1/2” through 2” SWEAT ON, water hammer arrestor. All arrestors meet and/or exceed performance requirements as set forth by the ASSE standard 1010. The SWEAT ON ARRESTOR will provide a maintenance free installation that is fully guaranteed by our warranty when installed in accordance with the manufacturers recommendations.Listed by recognized national standardsLeast expensive to installDesigned to solder in standard copper elbows and teesSuitable for all potable water applicationsRequires no maintenanceSized in Accordance with Service Pipe DimensionsMaintenance Free - The Piston is the Only Moving Part