The Zurn Wilkins 1260XL Water Hammer Arrestor protects residential, commercial and industrial water lines against over-pressure during surges following quick valve closure. The Water Hammer Arrester shall be certified to NSF/ANSI 372, consist of a copper body with a low lead brass hexagonal male pipe threaded inlet, an acetal, polycarbonate or low lead brass piston, EPDM o-rings and lead free solder. The device shall be pre-charged and sealed at the factory. The Water Hammer Arrester shall be a ZURN WILKINS Model 1260XL.