Sioux Chief 645WP43 3/4 Inch F1960 Pex-a Poly Coupling

Product Description

The SIOUX CHIEF 645WP43 is a 3/4 inch F1960 PEX-A poly coupling designed for use in potable water and hydronic piping systems. This fitting connects two sections of 3/4 inch PEX-A tubing using the F1960 expansion method, which requires an expansion tool to enlarge the pipe end and ring before seating the fitting. The polypropylene body provides corrosion resistance and is compatible with the F1960 cold-expansion connection standard. Licensed plumbers and pipefitters install this type of coupling during new construction and repipe work where PEX-A distribution systems are specified.

This coupling is suited for residential and light commercial plumbing applications where 3/4 inch PEX-A supply lines are run for domestic hot or cold water distribution. The F1960 expansion fitting method is common in systems requiring a reliable, barb-free connection. It is typically installed in manifold-based home-run layouts as well as trunk-and-branch configurations within walls, ceilings, and crawlspaces.

Key Features

• 3/4 inch F1960 expansion-style connection on both ends for PEX-A tubing
• Polypropylene construction offers corrosion resistance in potable water service
• Cold-expansion method creates a strong, reliable joint without barbs or clamps
• Compatible with standard F1960 expansion rings and tools per ASTM F1960

Compatibility

Designed as an OEM-style replacement and standard fitting for 3/4 inch PEX-A piping systems using the F1960 cold-expansion connection method.

Installation Notes

Installation requires a calibrated F1960 expansion tool and matching expansion rings sized for 3/4 inch PEX-A tubing. Shut off the water supply and depressurize the line before cutting into any existing piping. Follow local plumbing codes and ASTM F1960 standards for expansion fitting installation procedures. Allow the expanded joint to contract fully onto the fitting before pressurizing the system.

Technical Specifications

• Connection Type: F1960 PEX-A Expansion
• Size: 3/4 inches x 3/4 inches
• Material: Polypropylene
• UPC: 739236423900

Standard Information

• Brand: SIOUX CHIEF
• Manufacturer Part Number: 645WP43