... , antifreeze, lower noise. Product DesciptionThe self-priming Submersible pump can be used for oxygenating and mixing in sewage water ... treatment. It integrates the pump, Air-blower, Gas-liquid mixers as one. It ... air pipe. The rotation of impeller makes the stator vacuum, and suck the air through the pipe, the water ... maintenance, and difficult to be blocked up. Sewage pump