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The SIOUX CHIEF 649WP4 is a 1-inch F1960 PEX-A polyethylene expansion sleeve designed for use in PEX-A tubing installations. This sleeve fits over PEX-A tubing during the expansion fitting process, creating a secure, leak-resistant connection when the expanded tubing and sleeve contract back around the fitting. It is a standard component in F1960-compliant cold-expansion PEX systems and is installed by licensed plumbers in both new construction and retrofit plumbing applications.
This sleeve is intended for 1-inch PEX-A tubing systems that follow the ASTM F1960 cold-expansion connection method. It is used in residential and light commercial water distribution systems, including supply lines for domestic hot and cold water. The F1960 expansion method requires matching-size sleeves and fittings, and this part is sized for 1-inch nominal tubing installations.
Designed for use with 1-inch ASTM F1960 PEX-A expansion fittings and 1-inch PEX-A tubing. This sleeve is not compatible with PEX-B or PEX-C tubing systems or crimp and clamp connection methods.
Installation should be performed by a licensed plumber following local plumbing codes and ASTM F1960 procedure requirements. Shut off the water supply and depressurize the line before beginning work. A proper PEX-A expansion tool sized for 1-inch tubing is required to expand both the tubing and sleeve before seating the fitting. Do not use this sleeve with non-expansion fittings or with tubing sizes other than 1 inch.
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