Reducer Tees has functionality very much similar to the Tee joints differing in the fact that the bi-directional flow is variable due to the change in the diameter of the two output channels. The inlet channels have a diameter of 16 mm and the reduced outlet channel contains a diameter of 12mm which changes the outlet flow. These types of Tees are exclusively used in the places between mainline and sub-main lines without the use of other equipment.