BrassCraft 1/2 in. Nom Comp Inlet x 3/8 in. O.D. Comp x 3/8 in. O.D. Comp Dual Outlet Dual Shut-Off 1/4-Turn Straight Ball Valve KTCR1901DVSX R - The Home Depot
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BrassCraft 1/2 in. Nominal Compression Inlet x 3/8 in. O.D. Compression x 3/8 in. O.D. Compression Dual Outlet 1/4 Turn Ball Valve KTCR1901X R1 - The Home Depot
Oatey Quarter Turn Ball Valve Copper Sweat Ice Maker Outlet Box in the Appliance Outlet Boxes department at Lowes.com