Ndl Industries W1010 Copper Reducing Coupling 3/8x5/16 Cxc

Product Description

The NDL INDUSTRIES W1010 is a copper reducing coupling designed to connect two copper tube lines of different diameters using sweat (solder) end connections. It steps down from a 3/8-inch line to a 5/16-inch line and uses a copper x copper (C x C) connection type on both ends. The fitting is manufactured in a standard coupling profile for straightforward inline installation. Plumbers, HVAC technicians, and refrigeration technicians reach for this type of fitting when a diameter transition is required within a copper tube run.

This reducing coupling is suited for residential and light commercial applications where copper tube systems require a diameter change at a junction point. Typical install scenarios include hydronic systems, refrigerant line sets, domestic water distribution, and HVAC equipment connections. The C x C configuration requires proper flux application and soldering technique on both ends before making a permanent joint.

Key Features

• Reduces from 3/8 inches to 5/16 inches in a single inline fitting
• Copper x Copper (C x C) sweat connection on both ends
• Standard reducing coupling profile for straightforward inline installation
• Sold in a box quantity of 50 units for shop stock or job-lot purchasing

Compatibility

Designed as an OEM-style replacement and standard-use fitting compatible with 3/8-inch to 5/16-inch copper tube runs using sweat-end connections in plumbing, HVAC, and refrigeration applications.

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician following applicable local codes and ASTM B88 copper tube standards. Shut off and depressurize the line before cutting into any existing system. Both ends require thorough cleaning, flux application, and proper silver or lead-free solder depending on the system type and local code requirements. Avoid overheating the fitting during soldering, as excessive heat can cause the copper to oxidize and compromise the joint.

Technical Specifications

• Basic Fitting Type: Coupling
• Specific Fitting Type: Reducing Coupling
• Connection Type: C x C (Copper x Copper, Sweat)
• Connection Size: 3/8 inches x 5/16 inches
• Box Quantity: 50

Standard Information

• Brand: NDL INDUSTRIES
• Manufacturer Part Number: W1010