Note： 1.Water pump could not be used constantly for a long time ,otherwise it would overheat and affect the its efficiency. This product could be working constantly for 2~3 HOURS. 2. Its normal if water flow is found inside this produt because it is the remain from our test.3. This pump works only for fresh water, not for other liquid. 4. For the outlet pipe, do not modify the part of the water line or apply pressure on the outlet pipe. 5. There is a screw on the top of the pump that can be under water pressure, be aware that this screw can only be slightly loosened and do not tighten. Otherwise, the pump will leak water. 6. 6A is the maximum current, 2A-3A is the proper working current.