Oatey Centro II 1/4 in. Turn PVC Washing Machine Outlet Box with Water Hammer Arrestor 38107 - The Home Depot
How to Choose a Washing Machine Outlet Box | Oatey
Oatey Single Lever Copper Sweat Washing Machine Outlet Box in the Appliance Outlet Boxes department at Lowes.com
Amazon.com: EFIELD Washing Machine Outlet Box with Center Drain, 1/2 inch CPVC x 3/4 inch MHT (1/2"-Inch CPVC Connection), White (Regular) : Tools & Home Improvement