Mueller Streamline UNN00048 Wrot Copper Union 3/4

Product Description

The MUELLER STREAMLINE UNN00048 is a wrot copper sweat union designed for 3/4 inch copper tubing connections in water supply and hydronic piping systems. This union allows technicians to create a serviceable joint that can be disconnected and reconnected without cutting pipe, making it a practical choice for installations that may require future access or component replacement. At 0.37 pounds and compact overall dimensions, it fits cleanly into tight mechanical spaces. NSF certification confirms the fitting meets potable water safety standards, making it appropriate for domestic water applications.

This union is suited for residential and light commercial plumbing installations where a removable connection is needed on copper water lines. Typical applications include connections to water heaters, boilers, pressure reducing valves, and other inline components that require periodic service. The sweat-style ends integrate with standard Type L and Type M copper tubing. Licensed plumbers and pipefitters install this fitting as part of rough-in and finish plumbing work on both new construction and retrofit projects.

Key Features

• Wrot copper construction for durability and reliable solder joints
• 3/4 x 3/4 inch sweat connections compatible with standard copper tubing
• NSF certified for use in potable water systems
• Serviceable union joint allows future disconnection without cutting pipe
• Compact footprint at 1.7 inches wide and 2.15 inches in length

Compatibility

Designed as an OEM-style sweat union replacement for 3/4 inch copper water supply and hydronic piping systems in residential and light commercial applications.

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 fully drain the line before soldering to prevent steam buildup and incomplete joints. Clean all mating surfaces with emery cloth and apply flux before heating; overapplication of heat to wrot copper fittings can damage the material. Torque the union nut only after the joint has cooled completely to avoid distorting the sealing faces.

Technical Specifications

• Material: Wrot Copper
• Connection Size: 3/4 x 3/4 inches
• Connection Type: Copper Sweat
• Union Type: Union
• Actual Height: 1.7 inches
• Actual Width: 1.7 inches
• Actual Length/Depth: 2.15 inches
• Actual Weight: 0.37 pounds
• Standards Compliance: NSF

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: UNN00048