Sioux Chief 645WG No-Lead Bras...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$6.11
Sioux Chief 645WG No-Lead Brass F1960 PEX Coupling

Sioux Chief 645WG No-Lead Brass F1960 PEX Coupling

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Model: 645WG2

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

$6.11
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Sioux Chief 645WG No-Lead Brass F1960 PEX Coupling

The Sioux Chief 645WG is a one-piece no-lead brass coupling built for ASTM F1960 PEX expansion connections, available in sizes from 1/2" x 1/2" up to 1" x 1", including a 3/4" x 3/4" option, so plumbers can match the coupling to the PEX tubing run they're working with. Designed for use behind the wall in rough-in plumbing runs, this coupling joins two lengths of same-size PEX tubing using the F1960 expansion method, giving plumbers and contractors a straightforward, reliable way to extend or repair PEX supply lines without introducing lead into the water-carrying path. The one-piece brass body eliminates separate rings or inserts at the coupling itself, simplifying rough-in work and reducing the number of joints that must be made in tight wall or floor cavities. Across every size in the 645WG line, the fitting shares the same no-lead brass construction and F1960 expansion connection method, making it a consistent choice for jobs that require multiple coupling sizes on the same project.

Key Features

  • Size Range: Available in 1/2" x 1/2", 3/4" x 3/4", and 1" x 1" configurations for joining same-size PEX tubing runs in rough-in supply lines.
  • Durable Construction: One-piece no-lead brass body resists corrosion and is suited to continuous contact with potable water lines.
  • Connection Type: Engineered for the ASTM F1960 PEX expansion connection method, allowing a secure joint between two PEX tube ends.
  • No-Lead Alloy: Manufactured from no-lead brass, reducing lead content in the water-contact path of the fitting.
  • One-Piece Design: A single-piece coupling body simplifies installation and minimizes additional connection points in the run.
  • Packaging: Supplied 100 EA per package for jobs and stock requiring multiple couplings.

Technical Specifications

  • Country of Origin: USA
  • Size Range: 1/2" x 1/2" to 1" x 1"
  • Material: One-piece no-lead brass
  • Connection Method: ASTM F1960 PEX expansion
  • Packaging: 100 EA per package

Typical Applications

  • Residential and Commercial Rough-In Plumbing
  • Extending or Repairing PEX Supply Lines
  • New Construction PEX Distribution Systems
  • Renovation and Retrofit Plumbing Work
  • Behind-the-Wall and Under-Floor PEX Connections

Why Sioux Chief?

Sioux Chief builds the 645WG coupling line from one-piece no-lead brass specifically for ASTM F1960 PEX expansion systems, giving plumbers a dependable fitting for joining same-size PEX tubing across 1/2", 3/4", and 1" runs in rough-in applications. The no-lead brass construction and one-piece design support consistent, repeatable installations across residential and commercial jobs, and the 100 EA packaging keeps crews stocked for high-volume rough-in work regardless of which size the project calls for.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Coupling
Connection Type:
Push-Fit
Standards:
ASTM F1960
Country of Origin:
United States
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Fittings and Valves
Product Material:
Brass
Product Size:
1/2 x 1/2"

Sioux Chief 645WG2 – Frequently Asked Questions

1) Will the Sioux Chief 645WG coupling work with my Uponor-style PEX expansion tool?
The 645WG is built for the ASTM F1960 PEX expansion connection method, so it joins with the expansion tool and PEX-a tubing with F1960 rings that your crew already uses for that system. It is not a crimp or clamp fitting, so a crimp ring tool will not make this joint.
2) What sizes does the Sioux Chief 645WG PEX coupling come in?
Three same-size configurations: 1/2 x 1/2 inch (645WG2), 3/4 x 3/4 inch (645WG3), and 1 x 1 inch (645WG4). All three join two runs of the same diameter PEX, so if you need to step from 3/4 down to 1/2 you need a reducing coupling instead, not a 645WG.
3) Is this brass coupling safe for potable water lines?
The 645WG body is one-piece no-lead brass, made for continuous contact with potable water supply lines, which is why it gets used behind the wall on both residential and commercial rough-in.
4) Can I use the 645WG to repair a PEX line buried in a wall or under a floor?
That is exactly the use case. The one-piece body means there are no separate inserts or rings at the coupling itself, so you are only making the two expansion connections, which matters when you are working in a tight wall or floor cavity. Cut out the damaged section, expand both tube ends over the coupling, and the repair sits inside the run.
5) How many 645WG couplings come in a package?
The 645WG ships 100 each per package, which is bulk rough-in quantity rather than a counter pack. Worth knowing before you order a single fitting for a one-off repair.
6) Do I need different 645WG part numbers if a job uses 1/2 inch, 3/4 inch and 1 inch PEX?
Yes, one part number per size: 645WG2 for 1/2 inch, 645WG3 for 3/4 inch, 645WG4 for 1 inch. The material and connection method are identical across all three, so a crew stocking all three sizes installs them the same way with the same expansion tool and only swaps the head and ring size.
7) Are Sioux Chief 645WG couplings made in the USA?
Yes, country of origin on the 645WG line is the United States. That matters on public and institutional jobs carrying domestic-sourcing requirements.
How fast can I get the Sioux Chief 645WG2 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 645WG2 come with a warranty?
Absolutely. The Sioux Chief 645WG2 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 645WG2?
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 645WG2 from ZenSupply?
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