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Simple, straightforward and low shipping rates for these washing machine outlet boxes.



Washing Machine Outlet Boxes


These washing machine outlet boxes provide quick, safe, water supply shut-off access. Complete with knockouts for waste or water lines, the box provides a recessed space for your supply valves. Heavy-duty mounting straps and an adjustable faceplate are also included. These boxes are designed to install in panel, drywall or plastered surfaces, and provide a finished look to your installations.

Sioux Chief Ox Box Washing Machine Outlet Box
Washing Machine Outlet Box
Click here to see what's included
Main Features of the Ox Box
  • Boxes and frame can be separated for flexible layout
  • Strong and fast mounting over the stud
  • Durable ABS stands up to job site abuse
  • Easy to test with integrated Grip Tip test nipple
  • Drain knockout easily removes in one piece
  • 1/4 turn lever handle ball valves
  • 1/2" mip / 1/2" female sweat inlet connection
  • 3/4" male garden hose thread outlet
  • Proudly made in the USA USA flag button
  • Can be used with FloodStops for increased flood protection
    - more FloodStop information
  • Ox Boxdimensions

  • The Ox Box Includes:
    • 18" Galvanized steel support bracket
    • Box Clip
    • Attractive yet durable white double frame
    • 1/4 turn lever handle ball valves (with or without hammer arrestors)
Description Price & Quantity
Ox Box washing machine outlet box - includes 2 each 1/4 turn ball valves assembled with mini-rester water hammer arrestors $47.92
Ox Box washing machine outlet box with 2 each 1/4 turn ball valves (less mini-resters) $28.54

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Find large selection of water hammer arresters



The Fire Rated Sioux Chief Ox Box - Washing Machine Box
Fire Rated Ox box Features:
  • Constructed using fire retardant plastic resin
  • Over-the-stud installation is the quickest, easiest, strongest, and carries the greatest fire certification in the industry
  • Drain box can be positioned on the left or right side of the stud
  • Available with Mini-Rester water hammer arresters (2ea)
  • 18" bracket
  • 1/4 turn brass ball valves
  • 1/2" female sweat inlet connections
  • 3/4" male garden hose thread outlet
  • Proudly made in the USA USA flag button
  • Can be used with FloodStops for increased flood protection - more information about FloodStops
  • Rough-in dimensions: 10" W x 5 1/2" H x 3-1/2" D
Description Price & Quantity
Ox Box Fire Rated Washing Machine Box with 2 each 1/4 turn ball valves $69.58
Ox Box Fire Rated Washing Machine Box With 2 each 1/4 turn ball valves assembled with Mini-Arresters $91.75

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2 x 4 Outlet Washing Machine Outlet Box
Washing Machine Outlet Box
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  • 2 ports and 4 drains means installation versatility!
  • Reversible drain - allows for right or left hand drain installation
  • Attach water lines from bottom or top
  • Valves can be operated individually or as one single unit
  • Great for commercial or residential applications
  • Includes support brackets for direct stud mounting and trim plate
  • 2" drain opening fits PVC or ABS Sch. 40 DWV pipe
  • 1/2" mip / 1/2" sweat connection combination inlets
  • 3/4" male garden hose thread outlets
  • Box constructed of PVC
  • Can be used with FloodStops
  • More information about FloodStops
  • 2x4 Outlet Washing Machine Box dimensions

  • 2x4 Outlet Box Includes:
    1/4 turn brass ball valves
    • 2 support brackets
    • Snap-on white faceplate frame - fits up to 1" drywall
    • Test cap
Description Price & Quantity
2 x 4 Outlet washing machine outlet box $25.70

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Metal Washing Machine Outlet Box
Washing Machine Outlet Box
Click here to see what's included
  • High strength steel box
  • Heavy duty metal support brackets
  • 2" abs drain opening
  • Easy to remove 1/2" metal cap knockouts
  • Left or right hand drain configurations
  • Metal Washing Machine Outlet Box dimensions

  • Metal Outlet Box Includes:
    • Bronze Single lever dual washing mashing valve
    • 3/4" hose thread outlet
    • 1/2" mips with 1/2" sweat inlet
    • 2-3/8" center-to-center on inlets and outlets
    • 2 metal support brackets
    • Screw on 18 gauge metal faceplate
Description Price & Quantity
Metal washing machine outlet box $82.58

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FloodStop System for Washing Machines
FloodStops can be used with Double Outlet Washing Maching Outlet Box and the Ox Box
FloodStop system for washing machines
(old style control unit shown)
View new style control unit
FloodStop (FS 3/4-H90 V-4) automatically shuts off the water supply to the Washing Machine and sounds an alarm, leaving all other household fixtures and appliances operational. Powered by AC Adaptor/Transformer or Batteries. Output contacts available, which allow the Controller to connect with Alarm, Home Automation or Auto-Dialer systems if desired. Easily installed in ten minutes. 5-Year Manufacturer's Warranty.

Prevent flooding from failed Washing Machines and hoses:
Washing Machines are one of the most damaging appliances within the home. Washing Machine related flooding can happen at any time, from hoses with ruptures or cracked fittings, to internal failures from clamps, valves, pumps, drains and failed switches. Whether at home, at work, or on vacation these flooding events go undetected for hours or even days.

FloodStop (FS 3/4-H90-V4) Components:
  • Motorized Ball Valves (Two valves, 3/4" swivel hose thread union)
  • Control Unit (with Battery Backup 4 X AA Size) and 30" cord
  • Water/Leak Sensor (1-1/4" X 7-1/2") with 7' cord
  • AC Power Adaptor (or use 4 X AA Batteries as Primary Power Source)
  • (2) 6" Output Contact Wires


  • How FloodStop (FS 3/4-H90-V4) Works:
  • Each FloodStop valve is screwed onto the hot and cold water hose bibs
  • Water/leak sensor is placed on the floor behind Washing Machine
  • Valves stay open until water loss is detected
  • Water on sensor immediately closes FloodStop valves and sounds alarm
  • Valves stay closed until problem is attended to and system is reset


  • Without FloodStop, Flooding Will Continue:
    Unexpected appliance failures cause flooding and water damage, which will continue unabated until the problem is discovered and the water supply is manually shut off.

    With Flood Stop, Property Damage is Avoided:
    Water loss from unexpected appliance failures and hose ruptures are detected by FloodStop's water/leak sensor, and the water supply is automatically and immediately shut off.

    Make sure to follow all of the manufacturer's instructions and directions by performing the proper maintenance and inspections to ensure that you are fully protected from flooding -this is ever-so-important with (man-made) safety devices as they will eventually fail.

    Model # Description Price & Quantity
    FS 3/4-H90-V4 3/4" Hose Threaded Motorized Ball Valves with 90 Degree Downward Outlet (Brass) - rated 0-180 psi $183.97
    FSAS Additional Sensors for FloodStop Systems $14.73

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    We offer quality stainless steel flexible water supply hoses for washing machines




    Please note: While we strive to ensure every product we label as "Made in the USA" really is 100% made in the USA, it is also important to understand that sometimes manufacturers make changes to their products, or for various reasons may receive components or materials that they would normally purchase domestically from an overseas supplier - and they don't necessarily let distributors (like us!) know that they've changed something about the product or where it is manufactured.

    If you receive a product that PlumbingSupply.com® says is "Made in the USA" and the product states it was manufactured elsewhere, please contact us. We will happily replace or refund your purchase to your satisfaction.

    Frequently Asked Questions

    Q. "What's the difference between standard and fire rated outlet boxes?"
    A. Standard outlet boxes are simply a box installed between the wall studs to keep valves out of the way yet accessible. These are not rated for use in areas that require fire retardant materials. Fire retardant gas outlet boxes are designed to be used in conjunction with fire retardant building materials to maintain the performance of the fire retardant construction. The outlet boxes on this page are not only constructed of a fire-retardant resin, but they also feature intumescent pads, which is a kind of fire stop putty designed to retard heat transfer in the event a fire reaches the pad.



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