Features: Easy to use: twice - press three times and the petrol flows by itself. Of course, the flow direction must be observed and the canister must be higher than the tank. The built-in check valve can effectively prevent the liquid backflow. Control valve: the control valve can regulate the size and opening of the water flow and also serve as a connection. If you feel that the hose is not long enough, you can connect other hoses of the same size via the control valve. Portable fuel pump: this pump is suitable for cars, engines, lawn mowers, boats, ships, helicopters, ships, motorcycles, etc. and also for aquariums, swimming pools, home breweries, etc. .