Rwc UC4006LFA Sharkbite 3/8 in Pex Polybutylene Coupling

Product Description

The RWC UC4006LFA is a SharkBite crimp-style transition fitting designed to connect 3/8 inch PEX tubing to 3/8 inch Polybutylene pipe. Constructed from lead-free DZR brass, this coupling meets NSF/ANSI 61 and NSF 372 low-lead certification requirements, making it suitable for potable water distribution systems. Two color-coordinated crimp rings are included: a black crimp ring for the PEX side and a copper-colored crimp ring for the Polybutylene side. This fitting is a cost-effective field solution for transition repairs and retrofit work on residential plumbing systems. Licensed plumbers and experienced plumbing technicians are the intended installers.

The UC4006LFA is used in residential potable water distribution and hydronic heating applications where PEX tubing meets existing Polybutylene pipe. This scenario is common in repair and remodel work on homes originally plumbed with Polybutylene systems. The fitting accommodates 3/8 inch pipe sizing on both sides and ships individually, making it appropriate for targeted repair situations rather than bulk new construction runs.

Key Features

• Lead-free DZR brass construction meets NSF 372 low-lead requirements
• NSF/ANSI 61 certified for potable water distribution
• Includes two color-coordinated crimp rings — black for PEX, copper-colored for Polybutylene
• Crimp-style connection compatible with standard PEX crimp tools
• Suitable for both potable water and hydronic heating applications

Compatibility

Designed for use with 3/8 inch PEX tubing and 3/8 inch Polybutylene pipe in potable water distribution and hydronic heating systems.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC guidelines. Shut off the water supply and relieve system pressure before cutting into any existing line. A calibrated PEX crimp tool and go/no-go gauge are required to ensure a proper crimp on both the PEX and Polybutylene sides. Use the correct included crimp ring for each pipe type — do not interchange the black and copper-colored rings.

Technical Specifications

• Pipe Size: 3/8 inches
• Connection Type: Crimp (PEX) to Crimp (Polybutylene)
• Material: Lead-Free DZR Brass
• Weight: 0.017 pounds
• Certifications: NSF/ANSI 61, NSF 372
• Unit of Measure: Each
• Minimum Order Quantity: 6
• UPC: 00697285604841

Standard Information

• Brand: RWC
• Manufacturer Part Number: UC4006LFA