Sioux Chief 869-S59 ABS Backwa...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$75.32
Sioux Chief 869-S59 ABS Backwater Valve & Sleeve Kit, 869S Series

Sioux Chief 869-S59 ABS Backwater Valve & Sleeve Kit, 869S Series

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Model: 869-S3AS

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

$75.32
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Sioux Chief 869-S59 ABS Backwater Valve & Sleeve Kit, 869S Series

The Sioux Chief 869S Series backwater valve and sleeve kit is built for horizontal, gravity-flow drain-waste-vent (DWV) installations on Sch. 40 lines, and is available in 3" and 4" sizes to match a range of rough-in requirements. Molded from tough, engineered ABS resin, this kit is designed to prevent sewage backflow into a building when the municipal sewer line surcharges, protecting the structure from costly water damage. The modular valve design accepts interchangeable accessories and can be adapted for either shallow-bury or deep-bury installation, giving plumbing contractors flexibility to match job-site conditions without sourcing a different part number for every scenario.

Key Features

  • Trade Size Range: Available in 3" and 4" Sch. 40 DWV sizing, matching standard drain-waste-vent piping used in horizontal gravity-flow runs.
  • Durable Construction: Structurally rugged ABS resin body resists the stresses of underground and in-wall backwater valve service across both sizes.
  • Gravity-Flow Application: Engineered specifically for horizontal, gravity-flow installations only — not rated for pressurized or vertical force-main service.
  • Adaptable Bury Depth: Valve configuration can be adapted for shallow-bury or deep-bury installations to suit varying trench depths.
  • Modular Valve Design: Interchangeable accessories let contractors service or reconfigure the valve without replacing the entire assembly.
  • Sleeve Kit Included: Supplied as a complete valve and sleeve kit for a single-package rough-in solution on 3" or 4" DWV lines.
  • Series-Wide Consistency: Both sizes in the 869S Series share the same ABS construction, modular accessory system, and bury-depth adaptability, simplifying spec selection across branch and main-line DWV runs.

Technical Specifications

  • Country of Origin: United States
  • Packaging: 1 EA
  • Size Options: 3" and 4" Sch. 40 DWV
  • Material: ABS Resin

Typical Applications

  • Residential and Commercial Rough-In Drain-Waste-Vent Systems
  • Horizontal Gravity-Flow Sewer Lateral Protection
  • Backflow Prevention on 3" and 4" Sch. 40 DWV Lines
  • New Construction and Renovation Below-Grade Plumbing
  • Shallow-Bury and Deep-Bury Underground Installations

Why Sioux Chief?

Sioux Chief builds the 869S Series backwater valve and sleeve kit from structurally rugged, engineered ABS resin to stand up to the demands of underground, horizontal gravity-flow DWV installations in both 3" and 4" sizes. The modular, interchangeable-accessory design gives plumbing contractors a serviceable, adaptable solution for both shallow and deep-bury jobs, backed by Sioux Chief's reputation for dependable rough-in plumbing hardware manufactured in the United States. Whether specifying a smaller branch line or a larger main run, the 869S Series delivers consistent backflow protection without requiring contractors to learn a new part family for each size.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Backwater Valve
Configuration:
Shallow/Deep Bury Adaptable
Series:
869S
Country of Origin:
United States
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Fittings and Valves
Product Material:
ABS
Product Size:
4"

Sioux Chief 869-S3AS – Frequently Asked Questions

1) Will the Sioux Chief 869S backwater valve work on a vertical stack or a pressurized sewer force main?
No. The 869S Series valve and sleeve kit is built for horizontal, gravity-flow DWV runs only. It is not rated for pressurized or vertical force-main service, so if you are protecting a line that gets pumped, this is the wrong device. Use it on a gravity sewer lateral or a horizontal branch.
2) What pipe sizes does the Sioux Chief 869S backwater valve kit come in, and which part number do I order?
Two trade sizes, both for Sch. 40 DWV pipe: 3 inch is part number 869-S3AS and 4 inch is 869-S4AS. Pick the size to match the lateral you are cutting into. Both sizes share the same ABS body and modular accessory system, so the install method does not change between them.
3) My trench is deep. Do I need a different backwater valve part number for a deep-bury install?
No separate part number. The 869S valve is adaptable for either shallow-bury or deep-bury installation, so one kit covers both trench conditions. That is the main reason contractors spec it over a depth-specific assembly.
4) What comes in the Sioux Chief 869-S59 kit, and do I have to buy the sleeve separately?
The sleeve is included. The 869S Series ships as a complete valve and sleeve kit, one each per package, so you get the rough-in assembly in a single box. You still supply the Sch. 40 DWV pipe and solvent cement for the connections.
5) Can the Sioux Chief 869S backwater valve be serviced without digging out the whole assembly?
It is a modular design with interchangeable accessories, so the valve can be serviced or reconfigured without replacing the entire assembly. For property managers that matters: a flapper or internal component swap does not mean cutting out the body and re-piping the lateral.
6) Is the 869S backwater valve body ABS or PVC, and does that affect how I glue it in?
The body is molded engineered ABS resin. That means ABS solvent cement and ABS DWV pipe for a straight joint; if your existing line is PVC you will need a transition coupling rather than cementing ABS to PVC directly.
7) Should I put a 3 inch or 4 inch backwater valve on a residential sewer lateral?
Match the valve to the pipe you are protecting, not to a preference. The 869S comes in 3 inch for branch and smaller-diameter runs and 4 inch for the main lateral, both in Sch. 40 DWV sizing. Undersizing restricts gravity flow, and oversizing forces an unnecessary transition fitting on each side.
How fast can I get the Sioux Chief 869-S3AS 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 869-S3AS come with a warranty?
Absolutely. The Sioux Chief 869-S3AS 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 869-S3AS?
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 869-S3AS from ZenSupply?
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