Sioux Chief 642WP4 Pex-a Poly 90 Degree Elbow 1 Inch

Product Description

The SIOUX CHIEF 642WP4 is a 1-inch, 90-degree elbow fitting manufactured from polyethylene for use with F1960 PEX-A tubing systems. It provides a reliable directional change in PEX-A cold-expansion plumbing runs, connecting 1-inch PEX-A tubing at a 90-degree angle using the ASTM F1960 cold-expansion method. This fitting is designed for potable water distribution systems in residential and light commercial construction. Licensed plumbers and pipefitters install this type of fitting as part of roughed-in hot and cold water supply lines.

The 642WP4 is suited for residential and light commercial plumbing applications where F1960 PEX-A piping is specified. The F1960 cold-expansion connection method requires an expansion ring and expansion tool to seat the fitting, creating a strong, leak-resistant joint. This elbow is appropriate for use in wall cavities, floor assemblies, and mechanical rooms where a 90-degree directional change is needed in a 1-inch PEX-A supply line.

Key Features

• 90-degree elbow geometry for directional changes in PEX-A piping runs
• 1-inch connection size on both ends for consistent sizing throughout the run
• F1960 cold-expansion connection method for a cold-expansion ring and PEX-A compatible joint
• Polyethylene construction compatible with potable water systems
• Designed for use with ASTM F1960 PEX-A expansion fittings and tooling

Compatibility

Designed as an OEM-style replacement fitting for 1-inch F1960 PEX-A plumbing systems using the cold-expansion connection method.

Installation Notes

Installation must be performed by a licensed plumber in accordance with local plumbing codes and ASTM F1960 standards. Shut off the water supply and depressurize the line before cutting into existing piping. A compatible PEX-A expansion tool and F1960 expansion rings are required to properly seat this fitting. Do not use this fitting with F1877 clamp-style or F2080 expansion systems, as connection methods are not interchangeable.