Mueller Streamline TEE00143 Copper Tee 3/8x3/8x3/8

Product Description

The MUELLER STREAMLINE TEE00143 is a 90-degree copper tee fitting designed for joining three copper lines in plumbing, HVAC, and refrigeration piping systems. All three ports measure 3/8 inch, making this a straight-run tee suitable for splitting or combining flow in a single plane. The fitting is rated for temperatures from -20 to 400 degrees F, covering a wide range of residential and light commercial service conditions. It meets NSF, UL, and UR standards, confirming suitability for potable water and other regulated applications. Licensed plumbers and HVAC technicians are the primary installers of this type of fitting.

This tee is suited for residential and light commercial plumbing, hydronic, and refrigeration copper piping systems where a 3/8-inch branch connection is required. Its compact actual dimensions — 1.34 inches wide, 0.96 inches tall, and 0.55 inches in depth — make it appropriate for tight-space installations. The copper connection type is compatible with standard sweat-solder assembly methods common in trade work.

Key Features

• 90-degree tee configuration with equal 3/8 x 3/8 x 3/8 inch ports
• Copper construction for durability and corrosion resistance in fluid service
• Rated from -20 to 400 degrees F for broad service range
• NSF, UL, and UR listed for compliance with potable water and safety standards
• Lightweight at 0.04 pounds for easy handling in close-quarters work

Compatibility

Designed as an OEM-style copper sweat tee for 3/8-inch copper tubing lines in residential and light commercial plumbing, HVAC, and refrigeration piping applications.

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician following applicable IPC or IFGC guidelines. Shut off and depressurize the water or refrigerant line before cutting in the fitting. Clean and flux all joint surfaces before soldering to ensure a leak-free sweat connection. Avoid overheating the fitting during soldering, as excessive heat can damage nearby components or compromise the joint.

Technical Specifications

• Connection Size: 3/8 x 3/8 x 3/8 inches
• Connection Type: Copper (sweat)
• Angle: 90 degrees
• Temperature Rating: -20 to 400 degrees F
• Actual Width: 1.34 inches
• Actual Height: 0.96 inches
• Actual Length/Depth: 0.55 inches
• Actual Weight: 0.04 pounds
• Standards Compliance: NSF, UL, UR

Standard Information

• Brand: MUELLER STREAMLINE
• Manufacturer Part Number: TEE00143