Straight tees have all three openings the same size; reducing tees have a smaller branch. A tee is called by its run size and then branch size, for example 6 by 6 by 2. Flow entering the branch and splitting both ways along the run is called a bullhead arrangement, which adds turbulence and pressure drop, while branching off the run is the gentler path.
Put a 4 by 2 reducing tee at the low point and bring the 2 inch down for a drain valve.
Also heard as
- T
Related terms
Elbow
A fitting that changes the direction of a pipe run, usually by 90 or 45 degrees.
Reducer
A fitting that joins a larger pipe to a smaller one, either on a common centerline or with one side flat.
Olet
A forged branch fitting welded onto a run pipe to make an outlet without cutting in a tee.
Bull plug
A solid or tapped round-nosed male plug used to close the end of a swage, fitting or valve outlet.