The filter system filters the high-speed sand filters. Sand filter is a glass fiber, a large water tank made of concrete or metal, slightly square box has paved super thick sand bed of sand. Dual sand filter sand filter during a special operation in the swimming pool filtration, swimming pool dirty water through the filter of the inlet pipe clubs outdoor pool, water inlet pipe connected to the head inside the tank. Gravity, water down through the sand, the sand particles to intercept all dust and rubbish. At the bottom of the tank, the water filtered through the catchment device, and then flows out from the outlet pipe. After some time, the sand dust and dirt are deposited to reduce the water speed. Administrators can view the pool filter inlet and outlet pressure gauge to determine the extent of blockage inside the tank. If the inlet pressure gauge display is much larger than the outlet pipe pressure, the administrator will know a lot of garbage deposited in the sand. In other words, should the filter backwash. To filter backwash, the administrator can adjust the number of valves to change the direction of flow. Administrators can close the connection to the pool return pipe villa indoor pool, and open a connection to the sewer system outfall. The administrator of the filter adjusting a valve, the pipe is connected to the outlet pipe from the pump and connected to the intake pipe outfall. After these adjustments, the water from the bottom-up flow through the pump sand villa outdoor pool, take away the dust and rubbish. At the top of the filter tank, dirty water from flowing into the water, into the sewer. Pool | Shanghai Xiang Bath | villa indoor pool provided by the Shanghai Xiang bath. Shanghai Xiang Bath Equipment Co., Ltd. (www.shxsxy.com) SPA massage pool in engineering, installation, engineering, installation swimming pool, sauna, engineering, installation and other industries have high visibility, both business integrity, quality service, welcome to inquire, or consult Our "Business League call" it!