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

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.