Tees for pipe fittings. Also called pipe tees.Three-way joint, with the main line to branch office.Tee is a three hole, namely an import, two exits; or two import, an export of a chemical pipe fittings, t and y-shaped, size orifice, nozzles with different diameters, for three of the same or different lines of the Survey Office. Tee's main role is to change the direction of flow. http://www.sellsteels.com/steel-fitting/tees.html