What is the water distributor

"Water distribution" is in a certain area of the work according to certain rules of arrangement of water, the most common in the face evenly distributed water. The device to accomplish this task is a water distributor.
Common water distributor has perforated pipe, nozzle, filter head, rotary water distributor. For example, the sand filter in the water distributor is composed of the trunk - branch pipe - water hole composition, the lower side of each branch pipe evenly arranged a lot of equal diameter and other small holes, filter backwash water from the trunk To the branch, and then by the hole out of the branch pipe upward evenly filter sand. Rotary water distributor is able to rotate the perforated pipe, water treatment is also often used.