QW,WQ Submersible sewage pump is made from cast iron and used to transfer waste water with solid grain or fiber etc impurity. QWP,WQP Submersible sewage pump is made from stainless steel material and used to transfer the waste liquid with particle or fiber etc impurity and stainless steel pump has the good corrosion resistance.
QW,WQ QWP Submersible sewage pump 
