The central air conditioning water collector plays the role of distributing water flow to each branch, and the water collector plays the role of collecting water flow from each branch and loop. Water distributors and water collectors are installed to facilitate the connection of parallel pipes in various water loops, and play a pressure equalizing role to achieve uniform flow distribution. The water collector often needs to install a filter. In order to prevent the water pipeline system from being blocked and ensure the normal operation of the equipment and valves in the water pipeline system, a filter should be installed in the pipeline system to remove debris from the water. Usually the filter should be installed on the suction pipe of the water pump and the water inlet pipe of the heat exchanger.