Understanding Mechanical Tee: Types and Differences Explained

Mar 27, 2024 | NEWS

A mechanical tee is a pipe fitting used to create a branch connection in a pipeline system. It allows for the diversion of flow from the main pipe into a secondary pipe or device. Let’s explore the details:

Types of Mechanical Tee

This type of mechanical tee is cast from ductile iron and consists of two equal halves: one serving as the outlet and the other as the strap. It is commonly used in place of full-flow cast fittings. To install it, an oversized hole is drilled or cut into the pipe at the desired branch location.

Mechanical Threaded Tee Threaded End

Grooved mechanical tees have additional threads, nuts, and rubber rings compared to regular grooved tees. They serve the purpose of leading out a branch pipe with a different diameter. These tees can be connected using either grooves or threads. They are often used when the main pipe diameter is around 33, and U-shaped grooved mechanical tees are typically employed between 33 and 60.

Mechanical Threaded Tee Grooved End
  • Threaded Mechanical Tee (Special Case)

Similar to grooved mechanical tees, threaded mechanical tees are also widely used in grooved piping systems. However, the branch pipe connection port of the threaded mechanical tee is connected by threads.

Advantages of Mechanical Tee

  1. No Need for Welding or Soldering: In contrast to conventional techniques that necessitate heat or specialized equipment, mechanical tees can be effortlessly installed sans the requirement for welding or soldering. This characteristic not only enhances efficiency but also boosts safety during installation.
  2. Dependable and Leak-Resistant: Mechanical tees establish secure and impervious connections between pipes or tubes, ensuring reliability and leak prevention.
  3. Adaptability: Mechanical tees are compatible with a wide range of pipe materials, encompassing ductile iron, steel, stainless steel, and plastic, showcasing their versatility across different applications.


Mechanical tees find applications in plumbing, HVAC systems, automotive, and pneumatic systems. They are used for branching off pipelines, especially when a different diameter branch pipe is needed.


  1. Cost: Mechanical tees can be more expensive than regular tees.
  2. Space Considerations: The oversized hole required for installation may impact available space on the pipe.

In summary, mechanical tees provide a reliable and convenient way to create branch connections without the need for complex welding or soldering processes. Choose the appropriate type based on your specific requirements and pipe materials!