Mueller Streamline 9024400 Copper Adapter 3/8 in C X Fnpt

Product Description

The MUELLER STREAMLINE 9024400 is a 3/8-inch nominal copper adapter fitting with a C x FNPT end configuration. The sweat (C) end connects to copper tubing via soldering, while the female NPT threaded end transitions to a threaded pipe or fitting. This adapter is used in plumbing and HVAC piping systems where a copper line must terminate into a female threaded connection. Licensed plumbers and HVAC technicians are the primary installers. The fitting is manufactured domestically and carries the 603 designation consistent with NIBCO product line standards.

This adapter is suited for residential and light commercial plumbing installations, refrigeration piping, and HVAC hydronic or refrigerant line applications where a sweat-to-female-thread transition is required. It is sized at 3/8 inch nominal, making it appropriate for smaller-diameter branch lines, instrument connections, or service valve tie-ins. No specific model or system compatibility data was provided by the manufacturer for this SKU beyond the end style and size.

Key Features

• 3/8 inch nominal size for smaller-diameter copper line applications
• C x FNPT end style allows sweat-to-female-thread transition in a single fitting
• Copper construction provides corrosion resistance and reliable sweat-solder joints
• Domestic manufacture

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3/8-inch nominal copper piping systems requiring a female NPT threaded outlet.

Installation Notes

Installation is performed by licensed plumbers or HVAC technicians. Shut off the water supply or isolate the refrigerant circuit and relieve system pressure before soldering. Use appropriate flux and lead-free solder per applicable plumbing codes, including IPC and local jurisdiction requirements. Do not apply torch heat directly to the threaded end, as excess heat can damage thread integrity.

Technical Specifications

• Nominal Size: 3/8 inch
• End Style: C x FNPT (Sweat x Female NPT)
• Material: Copper
• Country of Origin: Domestic

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: 9024400