Sioux Chief 644XG Series No-Le...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1.37
Sioux Chief 644XG Series No-Lead FSWT x PEX Transition Adapter for Potable Water Lines

Sioux Chief 644XG Series No-Lead FSWT x PEX Transition Adapter for Potable Water Lines

(No reviews yet) Write a Review

Model: 644XG2

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

$1.37
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 644XG Series No-Lead FSWT x PEX Transition Adapter for Potable Water Lines

The Sioux Chief 644XG Series No-Lead FSWT x PEX Transition Adapter gives plumbing professionals a code-focused fitting for transitioning copper female sweat (FSWT) connections to PEX tubing on potable water supply lines. This no-lead adapter is available in 1/2" and 3/4" sizes as models 644XG2 and 644XG3, letting installers match the fitting to the exact pipe size required on a given rough-in run without switching product lines. Built with a no-lead body suited to potable water use, the 644XG Series fits new construction plumbing and retrofit or repair work where a clean copper-to-PEX transition point is needed.

Key Features

  • Trade Size Range: Available in 1/2" and 3/4" sizes (models 644XG2 and 644XG3) so installers can match the fitting to the job at hand.
  • FSWT x PEX Connection: Joins a copper female sweat (FSWT) fitting directly to PEX tubing, creating a single solder-side transition without extra adapters in the run.
  • No-Lead Construction: No-lead adapter body supports use on potable water supply lines where lead-free fittings are required by code.
  • Single-Fitting Transition: Combines the sweat and PEX connection points into one adapter, simplifying rough-in work and reducing the fitting count at a transition point.
  • Manufacturing Quality: Manufactured in the United States, supporting consistent quality control across every size in the 644XG Series.
  • Bulk Packaging: Packaged 500 EA per case, suited to distributor stocking programs and higher-volume contractor purchasing.

Certifications & Compliance

  • No-Lead / Lead-Free Compliant Construction
  • Suitable for Potable Water Supply Lines

Technical Specifications

  • Product Type: PEX Adapter
  • Series: 644XG (Models 644XG2, 644XG3)
  • Connection Type: FSWT x PEX
  • Trade Size Range: 1/2" - 3/4"
  • Country of Origin: United States

Typical Applications

  • Residential and Commercial Plumbing Installations
  • Copper-to-PEX Transitions
  • Potable Water Supply Line Repairs and Retrofits
  • New Construction Plumbing Rough-In
  • Distributor and Contractor Bulk Stocking Programs

Why Sioux Chief?

Sioux Chief has built a reputation among plumbing contractors and distributors for fittings that perform reliably under real jobsite conditions. The 644XG Series No-Lead Adapter reflects that same commitment, offering a no-lead FSWT x PEX transition that helps installers keep copper-to-PEX connections consistent across residential and commercial projects. Manufactured in the United States with consistent quality control and packaged for volume use at 500 EA per case, the 644XG Series is a straightforward, dependable choice across both its 644XG2 and 644XG3 configurations, giving distributors and contractors one no-lead solution for copper-to-PEX transitions on any potable water rough-in, whether sized at 1/2" or 3/4".

Product Specs

Country Of Origin:
United States
Product Type:
PEX Adapter
Connection Type:
FSWT x PEX
Series:
644XG
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Fittings and Valves
Product Size:
1/2" - 3/4"

Sioux Chief 644XG2 – Frequently Asked Questions

1) What sizes does the Sioux Chief 644XG PEX transition adapter come in, and which model number is which?
Two sizes: 1/2 inch is model 644XG2 and 3/4 inch is model 644XG3. Both are the same FSWT x PEX configuration, so you order by the trade size of the run you are transitioning.
2) How does the FSWT side of the 644XG adapter connect to copper?
The FSWT end is a female sweat socket, so a copper stub or male sweat fitting goes into it and gets soldered. That is the only joint you make with heat; the other end carries the PEX connection, so one fitting covers the whole copper-to-PEX transition instead of stacking adapters.
3) I need to tie new PEX into existing copper on a repair. Is this the right fitting or do I need a push-fit?
If the existing copper can be cut back and soldered, the 644XG is the cleaner answer: solder the female sweat end to the copper and run PEX off the other side, one fitting at the transition. If you cannot get heat on the pipe safely (wet line, finished wall, combustible framing nearby), a solder joint is the wrong choice and you want a mechanical push-fit or compression transition instead. The 644XG is specifically a sweat-side fitting.
4) Is the 644XG adapter made in the USA?
Yes, the 644XG Series is manufactured in the United States. That matters on public and institutional jobs where domestic-origin plumbing material is a condition of the spec.
5) Can I standardize on one fitting for both 1/2 and 3/4 inch copper-to-PEX transitions across a building?
Yes, within the two common branch sizes. Both the 1/2 inch 644XG2 and the 3/4 inch 644XG3 are the same no-lead FSWT x PEX design, so a maintenance shop or multi-family rough-in crew can stock one series and cover both sizes without changing product lines.
6) How is the Sioux Chief 644XG packaged for bulk buying?
Packaged 500 each per case, which is aimed at distributor stocking and contractors buying transition fittings in volume rather than by the handful.
How fast can I get the Sioux Chief 644XG2 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 644XG2 come with a warranty?
Absolutely. The Sioux Chief 644XG2 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 644XG2?
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 644XG2 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.
!