Lowe's sells appliance outlet boxes. The two categories are ice makers and washing machines, with the outlet box further defined by connection type, valve type, number of valves, water hammer arrestor option and discharge hose placement.
Oatey is the primary brand for appliance outlet boxes listed at Lowes.com. The quarter-turn ball valve copper sweat ice maker outlet box is designed to provide a water supply and shut off valve for refrigerator ice makers and other water dispensers.
There are several Oatey commercial and residential washing machine outlet boxes available. Some of the outlet boxes include a water hammer arrestor option, which provides the water pressure shock arrestors required for installation on supply lines to quick closing valves. There are discharge hose placement options as well, from center drains to wide mouth openings large enough for an auxiliary line to run along side the regular washing machine drain hose.