3. Tee. Straight tee, reducing tee, lateral tee, Y-tee, bottle type tee, mechanical tee, saddle tee, groove tee, butt weld tee, socket tee, ferrule tee, female threaded tee, heating tee, street tee, threaded tee, male threaded tee, noise-reduction tee, downstream tee, flanged tee, forged tee, seamless tee, sanitary tee.