Jones Stephens B05950 Washing Machine Box, Center Outlet with Water Hammer Arrestor, 1/2" PEX F1960 ConnectionJones Stephens B05950 This Jones Stephens Washing Machine Outlet Box is designed with quarter turn valves to provide convenient and quick water supply shut off access in the event of a leak or broken hose. The integrated water hammer arrestor absorbs the impact to pipes when flowing water suddenly stops and prevents knocking noises in the pipe. Compact in design, this center outlet box features a 1 2 PEX F1960 connection and includes all necessary