A tee is amongst the most common pipe fittings and is available with all female thread sockets, all solvent weld sockets, or with opposed solvent weld sockets and a side outlet with female threads. This is a T-shaped device which has three openings that act as an outlet for the pipe.

A tee is used for connecting pipes of different diameters or for changing the direction of pipe runs. A common type of pipe tee is the STRAIGHT tee, which has a straight-through portion and a 90-degree takeoff on one side. All three openings of the straight tee are of the same size.

Tees (branch outlets) are manufactured as “Equal” or “Reducing”. Equal tees are exactly that, all three ends are of the same size. Reducing tees come with a combination of different outlet sizes. They are used for branch connections in irrigation systems.

Typically, standard Tees are belled on all ends but any combination of belled or plain can be produced. There are many different combinations of sizes. Unusual combinations of sizes can also be achieved using component parts of tees, reducing tees and “street” reducers.

Some of the key dimensions while selecting a tee are:

Some of the industrial tees are:

The above tees are categorized on the basis of their shapes and structure, they can also be classified on the basis of the application they are required to perform. For instance, Sanitary Tees are used for sanitation works (and in vertical position only) where as Combination tees are used to attach PE tubing to PVC pipe and fittings.