The swimming pool water enters the circulating water pump through the lowest point main drain at the bottom of the pool, and is pumped into the filtering sand tank by the water pump. Prior to this, the flocculating agent is applied to the water suction port of the water pump by the dosing device, and is uniformly mixed with the water by the pump impeller to facilitate the filtration treatment effect. After the water passes through the filter and the plate heat exchanger, a disinfectant is added to the pipeline to directly discharge the water into the pool.   If you want to know more about WBS swimming pool pump, please click: http://www.wbspump.com/products2091196/Solar-Pool-Pumps.htm   E-mail: diffulaustralia@qq.com WhatsApp/ Tel:: +86 16605743599