Sioux Chief 696RG4021MF Fire R...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$127.81
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Sioux Chief 696RG4021MF Fire Rated Lavatory Outlet Box with Hammer Arrester

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Model: 696RG4021MF

In Stock (leaves warehouse same day if ordered before 3pm ET)

$127.81
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Sioux Chief 696RG4021MF Fire Rated Lavatory Box with Hammer Arrester

The Sioux Chief 696RG4021MF is a fire rated lavatory outlet box built for behind-the-wall rough-in installations where a lavatory supply connection and a water hammer arrester need to be housed together in a single fire-rated enclosure. This part number, 696RG4021MF, identifies the specific lavatory box configuration from Sioux Chief's outlet box line, and it is designed for installation inside a rated wall assembly ahead of fixture trim-out. As with other Sioux Chief rough-in boxes, it is intended to be set by the rough-in plumber during framing and wall-closure stages, well before the lavatory supply lines, stops, or trim are connected.

Key Features

  • Fire Rated Enclosure: Constructed to maintain a fire rating when installed per manufacturer requirements in a rated wall assembly, supporting code-driven rough-in projects that require fire-rated outlet boxes.
  • Integrated Water Hammer Arrester: Includes a built-in hammer arrester to help absorb pressure surges created when the lavatory supply valve is closed, reducing pipe noise and strain on the supply line.
  • Lavatory Box Configuration: Purpose-built as a lavatory outlet box, giving the rough-in plumber a dedicated enclosure for the lavatory supply connection rather than a generic multi-purpose box.
  • Model 696RG4021MF Identification: The 696RG4021MF designation corresponds to a specific Sioux Chief lavatory box build within the 696 series, allowing it to be matched to compatible trim and connection components from the same line.
  • Behind-the-Wall Installation: Designed to be installed and closed up inside the wall cavity during framing, with the lavatory supply connection point presented at the wall surface for later trim-out.
  • Single-Unit Packaging: Supplied as an individual unit (1 EA) for straightforward ordering on a per-fixture basis during rough-in takeoff.

Technical Specifications

  • Brand: Sioux Chief
  • Manufacturer Part Number: 696RG4021MF
  • Packaging: 1 EA

Typical Applications

  • Residential and Commercial Rough-In Plumbing
  • Fire-Rated Wall Assembly Installations
  • Lavatory Supply Rough-In
  • New Construction and Renovation Projects Requiring Fire-Rated Outlet Boxes

Why Sioux Chief?

Sioux Chief builds rough-in plumbing products, including outlet boxes, supply stops, and water hammer arresters, that are intended to go behind the wall and stay there for the life of the building. The 696RG4021MF pairs a fire-rated lavatory box with a built-in hammer arrester so plumbers can set the supply connection and surge protection in one step during framing, rather than adding a separate arrester later. For rough-in crews working on fire-rated wall assemblies, having the lavatory connection and arrester combined into a single Sioux Chief part simplifies takeoff and installation.

Manufacturer Resources

Product Specs

Product Type:
Outlet Box
Configuration:
Fire Rated
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Rough-In Boxes

Sioux Chief 696RG4021MF – Frequently Asked Questions

1) What is the Sioux Chief 696RG4021MF outlet box used for?
It's a lavatory outlet box for behind-the-wall rough-in work. The 696RG4021MF houses the lavatory supply connection and a built-in water hammer arrester in one fire-rated enclosure, so the rough-in plumber sets both in a single step during framing instead of adding a separate arrester later. Trim, stops, and supply lines go on afterward at trim-out.
2) Do I still need a separate water hammer arrester if I install the 696RG4021MF lavatory box?
No. The arrester is integrated into the box, sized to absorb the pressure surge when the lavatory supply valve closes, which cuts pipe noise and strain on the supply line. That's one less fitting in the takeoff per fixture.
3) Can a Sioux Chief 696RG4021MF go in a fire-rated wall assembly?
That is what it's built for. The 696RG4021MF is the fire rated configuration of the lavatory box and maintains its rating when installed per Sioux Chief's requirements inside a rated wall assembly. Install it to those instructions, not as a generic box, or the assembly rating is what you lose.
4) When in the build schedule does the 696RG4021MF get installed?
During framing and wall closure, before the wall is covered. The box is set in the cavity by the rough-in plumber with the lavatory supply connection point presented at the wall surface; stops, risers, and trim are connected later. If the drywall is already up, you're into cut-in work.
5) Is the 696 series lavatory box a general-purpose outlet box or lavatory-specific?
Lavatory-specific. The 696RG4021MF is a dedicated lavatory box build within Sioux Chief's 696 outlet box series, not a multi-purpose enclosure, and it is matched to compatible trim and connection components from that same line. For washer, icemaker, or other fixture rough-ins you'd want the box configured for that service instead.
6) Is the Sioux Chief 696RG4021MF sold individually or in a case?
Individually, 1 EA. That suits per-fixture takeoff, so you order one box per lavatory rough-in rather than breaking a case.
How fast can I get the Sioux Chief 696RG4021MF delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Sioux Chief 696RG4021MF come with a warranty?
Absolutely. The Sioux Chief 696RG4021MF is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Sioux Chief 696RG4021MF?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Sioux Chief 696RG4021MF from ZenSupply?
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