Sioux Chief No-Lead Brass PEX ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$10.33
Sioux Chief No-Lead Brass PEX Transition Adapter, FTG Sweat x F1960

Sioux Chief No-Lead Brass PEX Transition Adapter, FTG Sweat x F1960

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Model: 643WG23

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

$10.33
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Sioux Chief No-Lead Brass PEX Transition Adapter, FTG Sweat x F1960

The Sioux Chief PEX Transition Adapter line is a family of one-piece, no-lead brass fittings designed to connect FTG (fitting) sweat connections to F1960 PEX expansion fittings. Built for rough-in plumbers transitioning copper sweat lines to PEX tubing runs, these fittings are machined from a single piece of no-lead brass with a full-flow bore that eliminates unnecessary restriction through the transition point. Available across multiple sweat-to-PEX size combinations — including 643WG23 and 644WG43 — the sweat end solders directly to copper pipe while the F1960 end accepts PEX tubing expanded with an F1960-compatible expansion tool, giving installers a reliable behind-the-wall connection point for domestic water rough-in work.

Key Features

  • Trade Sizes: Offered in FTG sweat x F1960 PEX size combinations across the family, for transitioning copper sweat lines to PEX tubing.
  • One-Piece Construction: No-lead brass body machined from a single piece for a durable, leak-resistant transition fitting.
  • Full Flow Design: Interior bore is engineered with no restriction, maintaining consistent flow rate through the sweat-to-PEX transition.
  • Sweat Connection: The FTG end is sized for standard copper sweat/solder joints common in rough-in supply lines.
  • F1960 PEX End: Compatible with the F1960 PEX expansion connection method, used with cold-expansion PEX tooling and PEX tubing.
  • No-Lead Brass: Manufactured from no-lead brass material for use in potable water distribution rough-in applications.

Technical Specifications

  • Country of Origin: United States
  • Model Options: 643WG23, 644WG43
  • Packaging: 25 EA

Typical Applications

  • Residential and Commercial Rough-In Plumbing
  • Copper-to-PEX Transition Points Behind Walls or Under Floors
  • Domestic Water Supply Line Installations
  • New Construction and Repipe Projects
  • PEX Tubing Runs Fed from Existing Copper Stub-Outs

Why Sioux Chief?

Sioux Chief manufactures this family of transition adapters as one-piece no-lead brass fittings with a full-flow bore, giving plumbers a dependable connection point between copper sweat lines and F1960 PEX tubing across multiple size combinations. The no-lead brass construction and full-flow design make these fittings a straightforward, consistent choice for rough-in transition work where copper meets PEX, whether the job calls for the 643WG23 or 644WG43 configuration.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
PEX Transition Adapter
Connection Type:
F1960
Standards:
No-Lead
Country of Origin:
United States
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Fittings and Valves
Product Material:
No-Lead Brass
Product Size:
1" x 3/4"

Sioux Chief 643WG23 – Frequently Asked Questions

1) What size combinations does the Sioux Chief FTG sweat x F1960 PEX transition adapter come in?
Two trade sizes: 1/2 inch FTG sweat x 3/4 inch PEX (model 643WG23) and 1 inch FTG sweat x 3/4 inch PEX (model 644WG43). Both land on a 3/4 inch F1960 PEX end, so the choice comes down to the copper size you are soldering into.
2) Does the PEX end on this Sioux Chief brass adapter work with my crimp or cinch tool?
No. The PEX side is an F1960 cold-expansion fitting, so it needs an F1960-compatible expansion tool and F1960-rated PEX-a tubing. Crimp rings, cinch clamps, and press jaws will not make this connection. If your job is crimp or cinch, you need a different transition fitting.
3) What does FTG sweat mean on this transition adapter, and will it slip into a copper fitting?
FTG means the sweat end is sized like the outside of a copper pipe, so it inserts into the socket of another copper fitting rather than receiving pipe. It solders as a standard copper joint. If you need the end to receive copper tube instead, an FTG adapter is the wrong configuration.
4) Can I use this Sioux Chief brass PEX adapter on potable drinking water lines?
Yes. The body is no-lead brass and is made for potable water distribution rough-in, which is what domestic water supply piping requires.
5) Will soldering the sweat end damage the F1960 PEX side?
Solder the copper joint before you expand and set the PEX. The adapter is one piece of brass, so heat travels straight through the body to the F1960 end. Standard practice is to sweat the fitting to the copper, let it cool fully, then make the expansion connection.
6) Can I use this fitting for a buried or in-wall copper-to-PEX transition?
Yes, it is built for behind-wall and under-floor transition points in rough-in supply piping. One-piece brass construction means there is no mechanical joint in the middle of the body to work loose once it is concealed.
7) Will this adapter restrict flow where copper meets PEX?
The bore is full flow, machined with no restriction through the transition, so it does not step down internally at the joint. On the 1 inch sweat x 3/4 inch PEX version the flow is still governed by the 3/4 inch PEX leg downstream.
8) How is this Sioux Chief transition adapter packaged for a repipe job?
It ships 25 each, which suits repipe and new-construction rough-in where you are setting multiple copper-to-PEX transition points. Country of origin is the United States.
How fast can I get the Sioux Chief 643WG23 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 643WG23 come with a warranty?
Absolutely. The Sioux Chief 643WG23 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 643WG23?
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 643WG23 from ZenSupply?
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