QDX series submersible drainage pumps are consisted of water pumps, seals and single phase or three phase asynchronous submersible motor, with excellent quality, and one year warranty. they are suitable for delivering clean water such as river, lake water, well water and other liquids with the same characters both of chemical and physical as water which temperture is below 40 degree centigrade and PH value is between 6.5-6.8.