Selling Cheap Tee at UD. Riau Teknik, Pekanbaru. Tee fitting is a component that functions to divide the flow in the piping system. This component has branches that have the same size as the main pipe size (straight tee). As for something different, it is known as reducing tees. We sell Tee products as well as Rockwool, Pipe Connections, Valves, Refractory, Safety Equipment, Pressure Gauge. For supply and demand, click on the request for a quote button.