Q. "How do I know the correct Reducing Tee configuration to order?"
A. Reducing Tees are sized by determining the run (straight through portion) of the tee first and then the side outlet. The largest size of the run is always named first, the smaller size of the run second, and then the side outlet size last. Example: 3/4" x 1/2" x 1/2". When only two sizes are provided for the Tee description, the run size is listed first and then the side outlet. This means the run has the same size on both ends. Example: 3/4" x 1/2". When the run part of a tee is smaller sized than the side outlet part of the Tee it is often called a Bull Head Tee. Example: 1/2" x 3/4" or 3/4" x 1". This way of determining Tee sizes is the same for all Tees in plumbing no matter the type of material (PVC, copper, ABS, cast-iron, etc.) being used.
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