Sioux Chief sc-645xc3 3/4 in Pex Crimp X Cpvc Adapter Copper

Product Description

The SIOUX CHIEF sc-645xc3 is a straight adapter coupling designed to connect F1807 PowerPEX crimp tubing to CPVC pipe in a single transition fitting. Constructed from copper, this one-piece adapter is sized for 3/4-inch nominal connections. It follows the F1807 standard crimp end on the PEX side, making it compatible with standard PEX crimp rings and tools. Plumbers use this fitting when transitioning between PEX supply lines and existing CPVC distribution piping in residential and light commercial systems. The 25-year warranty covers both fittings and tubing regardless of mixed or matched system connections.

This adapter is suited for potable water distribution systems where a contractor needs to transition from flexible PEX tubing to rigid CPVC pipe. Typical install scenarios include new construction rough-in, remodel work tying into existing CPVC runs, and repair situations where a PEX supply line terminates at a CPVC branch or riser. The fitting is part of the Sioux Chief Tomahawk PEX fitting line, which covers all major PEX connection systems.

Key Features

• Transitions F1807 PowerPEX crimp connections to CPVC pipe in one fitting
• Copper construction for durability in potable water applications
• 3/4-inch nominal size fits standard residential supply line sizing
• One-piece design with no separate insert required
• Covered by a 25-year warranty on fittings and tubing, mixed or matched systems included

Compatibility

Designed as an OEM-style transition fitting for 3/4-inch F1807 PowerPEX crimp systems connecting to 3/4-inch CPVC pipe in residential and light commercial plumbing applications.

Installation Notes

Installation is performed by a licensed plumber. Shut off the water supply and depressurize the line before cutting into existing piping. The PEX crimp end requires a calibrated F1807 crimp ring and crimp tool; verify ring seating with a go/no-go gauge after crimping. Solvent-cement the CPVC socket end following IPC and manufacturer guidelines for primer and cement application in the ambient temperature range present at the job site.

Technical Specifications

• Nominal Size: 3/4 inch
• End Style: F1807 PowerPEX Crimp x CPVC
• Material: Copper
• Configuration: Straight Adapter, 1-Piece
• Warranty: 25 years
• UPC: 10739236404166

Standard Information

• Brand: SIOUX CHIEF
• Manufacturer Part Number: sc-645xc3