Sioux Chief 525 Strong Arm Loc...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$6.38
Sioux Chief 525 Strong Arm LockBlock PEX Stub-Out Bracket with Plastic Bend

Sioux Chief 525 Strong Arm LockBlock PEX Stub-Out Bracket with Plastic Bend

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Model: 525-161PB

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

$6.38
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Sioux Chief 525 Strong Arm LockBlock PEX Stub-Out Bracket with Plastic Bend

The Sioux Chief 525 Strong Arm is a rough-in stud bracket engineered to rigidly secure PEX or copper stub-outs from 1/2" to 1" CTS inside the wall cavity. Built around Sioux Chief's patented LockBlock design (U.S. Patent #8,061,390), the 525 Series includes a plastic PEX bend that guides tubing through the stud and locks it firmly in place, eliminating the pipe movement that leads to leaks, noise, and fitting failure at the fixture connection. The 525 Series is available in a One Bracket configuration for single stub-out lines or a Two Brackets configuration for dual-line setups such as washing machine or ice maker boxes, letting installers select the bracket count that matches the specific stub-out application. This is a rough-in component installed behind the wall or floor before drywall, intended for plumbers and contractors setting stub-outs for washing machines, ice makers, toilets, and other fixture supplies.

Key Features

  • Trade Size: Rigidly secures any 1/2" - 1" CTS stub-out, accommodating the most common PEX and copper tubing sizes used in fixture rough-in.
  • Bracket Count Options: Choose One Bracket for single stub-out lines or Two Brackets for applications requiring two stabilized lines, such as washing machine or ice maker supply setups.
  • Dual Mounting Configurations: L-bend brackets mount inside the stud cavity, while twisted brackets mount to the face of the stud, giving installers flexibility for different framing conditions.
  • LockBlock Grip System: LockBlocks grip both the tube and the brackets simultaneously when the mounting screws are tightened, locking the stub-out in a fixed position and preventing movement once installed.
  • Includes Plastic PEX Bend: Each configuration ships with a plastic PEX bend to support and guide the tubing through the stud without kinking, reducing flow restriction at the stub-out.
  • Patented Design: Protected under U.S. Patent #8,061,390, the Strong Arm bracket system is purpose-built for behind-the-wall stub-out stabilization rather than general-purpose pipe hanging.
  • Contractor Packaging: Packaged 25 EA per box for efficient stocking on rough-in jobs with multiple fixture locations.

Technical Specifications

  • Country of Origin: United States
  • Packaging: 25 EA per box
  • Compatible Tubing Range: 1/2" - 1" CTS
  • Includes: One Plastic PEX Bend
  • Mounting Options: L-bend (inside stud cavity) and Twisted (face of stud)
  • Bracket Count: Available in One Bracket or Two Bracket configurations

Typical Applications

  • Washing Machine and Ice Maker Supply Stub-Outs
  • Toilet and Lavatory Fixture Rough-In
  • New Residential and Commercial Construction Framing
  • Remodel Work Requiring Secure Stub-Out Stabilization
  • PEX and Copper Stub-Out Installations Behind Walls and Floors

Why Sioux Chief?

Sioux Chief designed the Strong Arm bracket system with a patented LockBlock mechanism specifically to solve the long-standing jobsite problem of stub-outs shifting or working loose inside the wall before trim-out. By combining a rigid stud-mounted bracket with an integrated plastic PEX bend, the 525 Series gives plumbers a single rough-in component that stabilizes tubing from 1/2" through 1" CTS, available in a One Bracket or Two Brackets configuration to match the job, supporting a cleaner, more reliable fixture connection once the wall is closed up. Made in the United States and packaged 25 EA per box, the 525 Series is built for efficient, repeatable rough-in work across new construction and remodel projects alike.

Note: California Prop 65 WARNING applies to this product per manufacturer disclosure.

Manufacturer Resources

Spec Sheet

Product Specs

Product Subgroup:
Hangers and Supports
Product Group:
Rough-In and Supports
Department:
Plumbing
Product Type:
Pipe Hanger
Product Size:
1/2" - 1" CTS
Country of Origin:
United States
Configuration:
One Bracket or Two Brackets
Series:
525 Strong Arm

Sioux Chief 525-161PB – Frequently Asked Questions

1) What is the difference between the one bracket and two bracket versions of the Sioux Chief 525PB stub-out bracket?
Model 525-161PB is the single bracket version and 525-162PB is the two bracket version. Both ship with the plastic PEX bend. Pick the two bracket model where you are setting a pair of stub-outs at one location, such as hot and cold at a washing machine box or a lavatory, and the single where only one supply line comes through the stud.
2) Can the Strong Arm stub-out bracket mount to the face of a stud, or does it have to sit inside the cavity?
Both. The L-bend brackets mount inside the stud cavity, and the twisted brackets mount to the face of the stud. That gives you an option when blocking, a double stud, or an existing wire run keeps you from working inside the bay.
3) What keeps a PEX stub-out from shifting in the wall before trim-out?
The patented LockBlock design is what does the work here. When you tighten the mounting screws, the LockBlocks clamp the tube and the bracket at the same time, locking the stub-out in a fixed position so it cannot move once the wall is closed. That is the movement that otherwise leads to leaks, noise, and fitting failure at the fixture connection. It is covered under U.S. Patent 8,061,390.
4) Do I need a separate PEX bend support with the Sioux Chief 525-161PB?
No separate bend is needed. The PB configuration ships with one plastic PEX bend that guides the tubing through the stud without kinking, which keeps the flow restriction down at the stub-out. You supply the mounting screws and the tubing.
5) Is the Sioux Chief Strong Arm a pipe hanger I can use for general pipe runs?
It is a rough-in stud bracket for stub-out stabilization, not a general pipe hanger. The Strong Arm is purpose-built to lock a fixture supply stub-out in place at the stud. For horizontal or vertical pipe runs through joists and along walls, use standard clamps, straps, or hangers instead.
6) How many 525 Strong Arm brackets come in a box?
Packed 25 each per box. On a multi-fixture rough-in that is usually one box per unit or per bath group, which is why it is stocked this way for production framing work.
7) When do I install the Strong Arm stub-out bracket during the job?
It goes in at rough-in, behind the wall or floor, before drywall. Once the board is up you cannot reach the bracket or the LockBlock screws, so the stub-outs for washing machines, ice makers, toilets, and lavatory supplies have to be set and locked while the framing is still open.
8) Where is the Sioux Chief 525 Strong Arm bracket made?
Made in the United States. That matters on public and institutional projects carrying domestic sourcing requirements. Note that a California Prop 65 warning applies per the manufacturer's disclosure.
How fast can I get the Sioux Chief 525-161PB 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 525-161PB come with a warranty?
Absolutely. The Sioux Chief 525-161PB 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 525-161PB?
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 525-161PB from ZenSupply?
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