Sioux Chief 644X Series FSWT x PEX Barb Transition Adapter, Copper-to-PEX Fitting

Sioux Chief 644X Series FSWT x PEX Barb Transition Adapter, Copper-to-PEX Fitting

The Sioux Chief 644X Series FSWT x PEX Barb Adapter delivers a code-ready transition between female sweat (FSWT) copper fittings and PEX barb tubing for rough-in, remodel, and repair work behind the wall. This Copper-to-PEX Transition Fitting is available across the 644X Series in 1/2", 3/4", and 1" FSWT x PEX Barb configurations (models 644X2, 644X3, and 644X4), letting plumbers convert a copper supply run to PEX without replacing the entire line. Manufactured in the United States and packaged 1000 EA per carton, the series is built for high-volume contractor and distributor stocking programs.

Key Features

• Trade Size Range: Available in 1/2", 3/4", and 1" FSWT x PEX Barb configurations to match the copper-to-PEX transition needed on the job.
• Connection Type: Female sweat (FSWT) solder joint on one end and a PEX barb fitting on the other, secured with a standard clamp or crimp ring for a leak-resistant joint.
• Series Platform: Part of the Sioux Chief 644X Series, spanning models 644X2, 644X3, and 644X4 built on the same FSWT x PEX Barb design.
• Country of Origin: Manufactured in the United States for consistent dimensional accuracy from batch to batch.
• Bulk Packaging: Supplied 1000 EA per carton, suited to high-volume contractor use, wholesale distribution, and inventory-efficient warehouse stocking.
• Application-Ready Design: Bridges copper and PEX systems using standard sweat-soldering and PEX-crimping tools already on a plumbing truck.

Technical Specifications

• Trade Size Range: 1/2" - 1"
• Connection Type: FSWT x PEX Barb
• Series: 644X Series (644X2, 644X3, 644X4)
• Country of Origin: United States
• Packaging: 1000 EA per carton

Typical Applications

• Residential and Commercial Plumbing Installations
• Copper-to-PEX Transition Connections
• Water Supply Line Repairs and Retrofits
• New Construction Plumbing Rough-In
• Remodel and Renovation Piping Upgrades

Why Sioux Chief?

Sioux Chief builds the 644X Series FSWT x PEX Barb Adapter for dependable copper-to-PEX transitions, backed by United States manufacturing and bulk 1000 EA carton packaging suited to professional plumbing workflows. Contractors, remodelers, and distributors rely on Sioux Chief fittings across models 644X2, 644X3, and 644X4 for consistent fit and steady availability in residential and commercial rough-in projects, spanning the full 1/2" to 1" size range for stocking programs.