About the Oatey Quadtro Washing Machine Outlet Box
The Oatey Quadtro Washing Machine Outlet Box is designed for both residential and commercial applications where supply valves and waste drains are recessed into the wall. Its proprietary Lock & Load valves allow for left, right, or center positioning of the drain pipe. This system includes all necessary support brackets for mounting water supply valves from either the top or bottom, ensuring a secure and adaptable installation.
Product Features
- Quadtro residential and commercial washing machine outlet box.
- 2-inch drain opening accommodates PVC or ABS Schedule 40 DWV pipe.
- Easy-to-remove, tool-free 1/4-turn knockout.
- Snap-on faceplate frame designed to accommodate up to 1-inch drywall.
- Box constructed from high-impact polystyrene for durability.
- Connects to copper supply line with sweat connection.
- Includes 4 support brackets for flexible top or bottom valve mounting.
- Two proprietary Lock & Load 1/4-turn valves enable left, right, or center positioning of the drain pipe.

Detailed view of the Oatey Quadtro components, highlighting the Lock & Load valve mounting system, 1/4-turn valves, tool-free test plug, and snap-on faceplate.
Components Included

An overview of the Oatey Quadtro Washing Machine Outlet Box components, including the main box, hot and cold valves, mounting brackets, and faceplate.
Installation Guide
Installation Video
This video provides a comprehensive guide to installing the Oatey Quadtro Washing Machine Outlet Box, covering height determination, securing the box, solvent welding the drain pipe, and connecting water lines.
Step 1: Planning and Preparation
- Determine the desired height for the outlet box. A typical height ranges from 36 to 42 inches from the finished floor to the bottom of the box.
- Mark the chosen height on the wall stud where the box will be installed.
Step 2: Mounting the Outlet Box

The Oatey Quadtro Washing Machine Outlet Box securely mounted between wall studs using the provided nailing brackets.
- Attach the provided nailing brackets to the sides of the outlet box.
- Align the box with the marked measurement on the stud.
- Secure the outlet box to the wall studs using appropriate fasteners through the nailing brackets. Ensure the box is level and firmly attached.
Step 3: Drain Pipe Connection
- Solvent weld the drain pipe into the box hub. Refer to the installation video for proper solvent welding techniques.
- Connect the P-trap to the drain pipe, ensuring a secure and leak-free connection.
Step 4: Water Supply Connections
- Secure the hot and cold water supply lines into the valve bodies. The valves are 1/4-turn brass ball valves.
- Turn on the main water supply and check all connections for leaks. Run water through the drain to verify no leaks are present before proceeding.
Step 5: Finalizing Installation

The Oatey Quadtro Washing Machine Outlet Box installed and ready for connection to a washing machine.
- Once all plumbing connections are verified leak-free, install the snap-on faceplate frame.
- Connect the water supply hoses and drain hose from the washing machine to the installed outlet box valves and drain opening.
- Cycle the washing machine and perform a final check for any leaks.
Adjustable Positioning

Diagram illustrating the flexible drain pipe positioning options (center, top, left offset, right offset) for the Oatey Quadtro box.
The Oatey Quadtro system offers versatile drain pipe positioning, allowing for center, top, left offset, or right offset configurations to suit various installation requirements.
Optional Accessories: Hammer Arrestors

Example of hammer arrestors, which can be accommodated by the Oatey Quadtro box to reduce noise and protect pipes from water hammer.
The Oatey Quadtro Washing Machine Outlet Box is designed to accommodate two hammer arrestors. Hammer arrestors help to reduce noise and protect your plumbing system from the damaging effects of water hammer.
Product Dimensions

Technical drawing showing the key dimensions of the Oatey Quadtro Washing Machine Outlet Box, including depth, width, and height.
- Product Dimensions: 1 x 2 x 1.6 inches (Box dimensions, actual installed dimensions will vary)
- Item Weight: 1.7 pounds
Technical Specifications
| Specification | Detail |
|---|---|
| Manufacturer | Oatey |
| Part Number | FBA_38529 |
| Item Model Number | 38529 |
| Material | Plastic |
| Color | White |
| Installation Method | Recessed Wall Mount |
| Number Of Pieces | 1 (Box assembly) |
| Included Components | Plumbing Fixtures; Kitchen Faucets and Accessories; faucet-balls |
Warranty Information
This product comes with a manufacturer's warranty. For specific details regarding coverage and duration, please refer to the warranty documentation included with your purchase or contact Oatey customer support.
Customer Support
For further assistance, technical questions, or to report any issues, please visit the official Oatey website or contact their customer service department. Contact information can typically be found on the product packaging or the Oatey website.





