2-pole motor 1.9Kg copper, 4-pole motor 2.9Kg copper and 6-stage motor 3.5Kg copper. According to relevant public information, the weight of copper core is different for different models of Sanyu electric pump, 2-pole motor 1.9Kg copper, 4-pole motor 2.9Kg copper and 6-stage motor 3.5Kg copper. Haicheng Sanyu Pump Industry Co., Ltd. is a well-known pump brand, a well-known trademark in Liaoning Province, a famous brand product in Liaoning Province, and a national enterprise that respects contracts and keeps promises.