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The Oatey 38546 Quadtro Single Lever Washing Machine Outlet Box is a recessed wall-mount plumbing box built for both commercial and residential laundry installations. It houses the hot and cold water supply valves along with the waste drain connection in a single compact unit that sits flush within the wall cavity. Plumbers and contractors choose this box when they need a clean, professional finish behind a washing machine without exposed piping. The 0.75 inch valve size is standard for residential and light commercial washing machine supply lines, making it compatible with the vast majority of installations. The box is constructed from high impact polystyrene, which resists cracking and holds up well in utility room environments. The valve bodies are made from brass, a proven material for water supply valves due to its corrosion resistance and long service life. One of the standout features of the Quadtro is the proprietary lock and load valve system. This design allows the drain pipe to be positioned on the left, right, or center of the box. That flexibility is a significant advantage during rough-in when pipe placement is already fixed in the wall. Installers do not need to reroute drain lines to fit the box. Instead, the box adapts to the existing drain location. The unit ships with all necessary support brackets included, so no additional hardware is required. The brackets allow the water supply valves to be mounted from either the top or the bottom of the box, giving further flexibility for different framing configurations. Single lever operation on the valves makes it easy to shut off water supply quickly during service or emergencies. This outlet box is a reliable, field-tested solution for washing machine rough-in work in new construction and remodel projects.
The Oatey 38546 Quadtro Outlet Box simplifies washing machine rough-in with flexible drain positioning and a complete bracket kit, reducing installation time in both new construction and remodel applications.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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