Sioux Chief 646XG Series One-P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2.27
Sioux Chief 646XG Series One-Piece No-Lead Brass MIP x PEX Rough-In Adapter

Sioux Chief 646XG Series One-Piece No-Lead Brass MIP x PEX Rough-In Adapter

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Model: 646XG2

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

$2.27
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Sioux Chief 646XG Series One-Piece No-Lead Brass MIP x PEX Rough-In Adapter

The Sioux Chief 646XG Series is a line of one-piece no-lead brass adapters that transition male iron pipe (MIP) threads to PEX tubing for rough-in water supply connections. The series spans MIP x PEX size combinations from 1/2\" through 1\", including 1/2\", 3/4\", 1\", 1\" x 3/4\", and 3/4\" x 1\" configurations, so plumbing and mechanical contractors can select the exact adapter needed for a given transition. Every 646XG Series adapter is machined as a single no-lead brass piece rather than assembled from multiple parts, built for behind-the-wall and under-floor rough-in work where a dependable threaded-to-PEX connection is required. Manufactured in the United States and packaged 50 pieces to a box, the series is easy to stock across sizes for repeat rough-in use on residential and commercial plumbing jobs.

Key Features

  • Size Range: Available in MIP x PEX combinations from 1/2\" through 1\", including 1/2\", 3/4\", 1\", 1\" x 3/4\", and 3/4\" x 1\", to match the size required on a given rough-in run.
  • Durable Construction: One-piece no-lead brass body resists corrosion and holds up to repeated rough-in handling and job-site conditions.
  • Connection Type: Male iron pipe (MIP) threads on one end transition directly to PEX tubing on the other, removing the need for an extra coupling in the run.
  • No-Lead Brass: Formulated as a no-lead fitting for use in potable-water rough-in applications.
  • One-Piece Design: A single machined brass body eliminates additional joints between the MIP and PEX ends, reducing potential leak points in the transition.
  • Packaging: Sold 50 pieces per box, sized for efficient rough-in stocking and job-site inventory management on plumbing crews.
  • Country of Origin: Manufactured in the United States.

Technical Specifications

  • Product Group: Rough-In and Supports
  • Product Subgroup: Fittings and Valves
  • Manufacturer Spec Sheet: Available from Sioux Chief; contact ZenSupply for the current PDF.

Typical Applications

  • Rough-In PEX Water Distribution Systems
  • Transitioning Threaded (MIP) Fittings to PEX Tubing
  • Residential and Commercial Plumbing Installations
  • New Construction and Remodel Rough-In Plumbing
  • Behind-the-Wall and Under-Floor Supply Connections
  • Stocking Standard Rough-In Adapters Across Multiple Sizes

Why Sioux Chief?

Sioux Chief machines the 646XG Series adapters from one-piece no-lead brass, giving plumbing contractors a durable, corrosion-resistant transition fitting for PEX rough-in work across a full range of MIP x PEX sizes rather than a multi-piece assembly with additional leak points. Manufactured in the United States and packaged 50 to a box for job-site stocking, the 646XG Series is a straightforward, no-lead choice for joining MIP-threaded components to PEX tubing across residential and commercial rough-in projects where a dependable, code-focused fitting matters.

Product Specs

Country Of Origin:
United States
Product Type:
MIP x PEX Adapter
Connection Type:
Threaded x PEX
Series:
646XG
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Fittings and Valves
Product Material:
Brass
Product Size:
1/2" - 1"
Country of Origin:
USA

Sioux Chief 646XG2 – Frequently Asked Questions

1) What sizes does the Sioux Chief 646XG MIP x PEX adapter come in?
The 646XG Series covers 1/2 inch through 1 inch, in five configurations: 1/2 inch (646XG2), 3/4 inch (646XG3), 1 inch (646XG4), plus two reducing/increasing combinations, 3/4 inch x 1 inch (646XG34) and 1 inch x 3/4 inch (646XG43). The combination parts let you change size at the same point you change from thread to PEX, so you don't need a separate coupling in the run.
2) What kind of connection is on each end of the 646XG adapter?
One end is male iron pipe thread (MIP), the other is a PEX end. So it threads into a female-threaded fitting, valve, or manifold port on the metal side and takes PEX tubing on the other side. It will not accept female threads or sweat copper.
3) Is the Sioux Chief 646XG brass adapter safe for potable water?
It's machined from no-lead brass and sold as a no-lead fitting for potable water rough-in, which is what most jurisdictions require on domestic water lines. The brass body also resists corrosion behind the wall and under the floor where the fitting won't be accessible later.
4) I need to go from 1 inch threaded down to 3/4 inch PEX. Which 646XG part is that?
Order the 646XG43, listed as 1 inch x 3/4 inch. If you need it the other way around, 3/4 inch on the threaded side going to 1 inch PEX, that's the 646XG34. Reading the size the way the series lists it keeps you from ordering the reverse part.
5) Should I use a one-piece MIP x PEX adapter or a threaded coupling plus a separate PEX adapter?
The one-piece route is the 646XG approach: a single machined brass body with MIP on one end and PEX on the other, so there is no intermediate joint between the two ends. A coupling-plus-adapter build adds a threaded joint that has to be sealed and that can weep later. For buried, in-wall, or under-floor transitions you can't get back to, fewer joints is the reason to go one-piece.
6) Can I use the 646XG to tie PEX into a threaded valve or manifold port during rough-in?
That's exactly the use. The MIP end threads into any female iron pipe port, a stop valve body, a manifold outlet, or a threaded fitting, and the PEX end takes the tubing run. Typical spots are behind-the-wall and under-floor supply connections on new construction and remodel rough-in, residential or commercial.
7) How are Sioux Chief 646XG adapters packaged, and is there a minimum quantity?
They ship 50 pieces to a box. That package size suits crews stocking a truck or a rough-in trailer across several sizes rather than buying onesies, so figure your order in box quantities per size.
How fast can I get the Sioux Chief 646XG2 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 646XG2 come with a warranty?
Absolutely. The Sioux Chief 646XG2 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 646XG2?
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 646XG2 from ZenSupply?
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