Sioux Chief 879 Series Slotted...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1.95
Sioux Chief 879 Series Slotted Test Plug with Threaded Brass Insert, Polypropylene

Sioux Chief 879 Series Slotted Test Plug with Threaded Brass Insert, Polypropylene

(No reviews yet) Write a Review

Model: SIO879-15

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

$1.95
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Sioux Chief 879 Series Slotted Test Plug with Threaded Brass Insert, Polypropylene

The Sioux Chief 879 Series is a slotted test plug built from reinforced polypropylene, designed for rough-in cleanout and test tee applications on ABS or PVC drain, waste and vent (DWV) piping. The 879 Series is available in sizes from 1-1/2" through 4" to match standard DWV cleanout and test tee openings. Unlike traditional plugs, this reinforced polypropylene construction resists seizing against ABS or PVC fittings over time, holds up to chemical exposure in the line, and offers greater long-term durability than conventional plug materials. The 879 Series plug is available with a threaded brass insert, giving plumbers and contractors the option of a removable, re-accessible test or cleanout point without having to cut back into the pipe.

Key Features

  • Size Range: Available in 1-1/2", 2-1/2", 3", and 4" sizes to fit standard DWV cleanout and test tee openings.
  • Durable Construction: Reinforced polypropylene body resists seizing on ABS or PVC fittings and stands up to chemical exposure better than traditional plug materials.
  • Threaded Brass Insert: Available with a threaded brass insert for a removable, reusable test/cleanout access point; also available without the insert for a permanent slip-in plug.
  • Color: Black polypropylene for easy visual identification in rough-in assemblies.
  • Made in the USA: Manufactured in the United States.

Technical Specifications

  • Country of Origin: USA
  • Packaging: 25 EA per package
  • Available Sizes: 1-1/2", 2-1/2", 3", 4"

Typical Applications

  • Rough-In DWV Cleanout Assemblies
  • Test Tee Plugging for Drain Line Pressure/Leak Testing
  • ABS and PVC Drain, Waste and Vent Piping
  • New Construction and Renovation Plumbing Rough-In
  • Commercial and Residential Cleanout Access Points

Why Sioux Chief?

Sioux Chief builds the 879 Series test plug from reinforced polypropylene specifically to outperform traditional plug materials on ABS and PVC systems, avoiding the seizing issues that plague standard plugs over time. With the option of a threaded brass insert for repeat access across the full 1-1/2" to 4" size range, the 879 Series gives plumbers a dependable, chemical-resistant rough-in component manufactured in the United States for reliable performance behind the wall.

[{"name": "Product Type", "value": "Test Plug"}, {"name": "Product Material", "value": "Polypropylene"}, {"name": "Product Color", "value": "Black"}, {"name": "Trade Size", "value": "1-1/2\" - 4\""}, {"name": "Country of Origin", "value": "United States"}]

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Test Plug
Configuration:
Slotted with Threaded Brass Insert
Country of Origin:
United States
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Fittings and Valves
Product Material:
Polypropylene
Product Color:
Black
Product Size:
4"

Sioux Chief SIO879-15 – Frequently Asked Questions

1) What sizes does the Sioux Chief 879 Series slotted test plug come in?
Four sizes: 1-1/2 inch (879-15), 2-1/2 inch (879-25), 3 inch (879-30), and 4 inch (879-40). They are sized to standard DWV cleanout and test tee openings, so pick the plug to match the fitting opening you are closing off, not the pipe's outside diameter.
2) Will this test plug work in ABS as well as PVC drain lines?
Both. The 879 Series is built for rough-in cleanout and test tee applications on ABS or PVC drain, waste and vent piping. The reinforced polypropylene body is specified to resist seizing against ABS or PVC fittings over time, which is the usual complaint with plugs left in a line for years.
3) What does the threaded brass insert on the 879 plug actually do for me?
The brass insert gives you a removable, re-accessible test or cleanout point. You can back the insert out to snake or re-test the line and put it back, instead of cutting into the pipe. The 879 is also offered without the insert as a permanent slip-in plug, so if the opening never needs to be reopened, that version is the one to order.
4) Can I leave a polypropylene test plug in the line permanently, or does it need to come out after the test?
It can stay. The reinforced polypropylene holds up to chemical exposure in the line and is specified for long-term durability, so the plug can remain in the cleanout or test tee after the pressure or leak test. If you expect to reopen it later, order the version with the threaded brass insert.
5) Is this a knock-out test plug or a mechanical expansion plug?
Neither. The 879 is a slotted polypropylene plug that seats in a DWV cleanout or test tee opening and is driven with a bar or large screwdriver in the slot. If you need a plug that expands against a smooth pipe end with a wing nut, that is a different product type. For a cleanout or test tee with a matching opening, the 879 is the right style.
6) Are Sioux Chief 879 test plugs made in the USA for a government or institutional spec?
Yes. Country of origin on the 879 Series is the United States, which matters on public work with domestic-content requirements on plumbing components.
7) How are Sioux Chief 879 test plugs packaged for a job order?
They come 25 each per package, which suits a multi-unit or commercial rough-in where you are plugging dozens of test tees on the same job. Keep that quantity in mind if you only need a handful for a single-family renovation.
8) Why are these test plugs black, and does the color mean anything?
The body is black polypropylene, which makes the plug easy to spot in a rough-in assembly during walk-through or inspection. It is identification, not a rating or a material grade difference.
How fast can I get the Sioux Chief SIO879-15 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 SIO879-15 come with a warranty?
Absolutely. The Sioux Chief SIO879-15 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 SIO879-15?
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 SIO879-15 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!