Elkhart Products COU-34X38 Reducer Coupling 3/4x3/8 Copper

Product Description

The ELKHART PRODUCTS COU-34X38 is a copper reducer coupling with stop, designed to transition between 3/4-inch and 3/8-inch copper tubing in sweat-solder plumbing systems. Part of the KLEENFIT product line, this fitting arrives pre-cleaned and bagged to reduce prep time on the job. The integral stop ensures consistent, repeatable insertion depth, which promotes uniform solder joints and reduces the risk of over-insertion. At 0.054 pounds, it is a compact, lightweight fitting suited for residential and light commercial plumbing rough-in and retrofit work. Licensed plumbers and pipefitters are the typical installers for this type of copper pressure fitting.

This reducer coupling is used wherever a plumbing system requires a diameter change between 3/4-inch and 3/8-inch copper lines. Common applications include supply line transitions, branch connections, and fixture rough-in work in residential construction and remodeling. The KLEENFIT cleaning and bagging process means the fitting interior is ready for flux application and soldering without additional field cleaning steps, making it well suited for high-volume rough-in situations where workflow efficiency matters.

Key Features

• Reduces from 3/4 inches to 3/8 inches copper tubing in a single fitting
• Integral stop provides consistent insertion depth for reliable solder joints
• KLEENFIT pre-cleaned and bagged — ready for flux and solder without field prep
• C x C (cup by cup) connection compatible with standard sweat-solder methods
• Copper construction for corrosion resistance and long service life in potable water systems
• Lightweight at 0.054 pounds — minimal load on supply lines

Compatibility

Designed as an OEM-style copper pressure fitting for use in standard 3/4-inch to 3/8-inch sweat-solder copper plumbing systems in residential and light commercial applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and depressurize and drain the line before cutting and fitting. Clean pipe ends and apply flux before soldering; the KLEENFIT pre-cleaned fitting interior eliminates the need to clean the fitting cup but the pipe end still requires standard preparation. Allow the joint to cool fully before restoring water pressure and inspecting for leaks.

Technical Specifications

• Model: 101R
• Product Line: KLEENFIT
• Material: Copper
• Connection Type: C x C (Sweat Solder)
• Inlet Size: 3/4 inches
• Outlet Size: 3/8 inches
• Length: 0.97 inches
• Width: 1.46 inches
• Height: 0.97 inches
• Weight: 0.054 pounds
• UPC: 683264307193

Standard Information

• Brand: ELKHART PRODUCTS
• Manufacturer Part Number: COU-34X38