Review on Efficient 12V Submersible Water Pump: Enjoydeal Aluminum Diesel Fuel Transfer Pump - 38mm Diameter, Ideal for Water, Oil, Diesel Fuel Refueling by Justin Abreu

This is just what I needed to fill the water ballast bags in my wings. The manufacturer has strict pressure limits due to the damage that can occur if exceeded. This pump delivers just the right amount of pressure (5'9" head). The flow rate is about 3 gallons per minute with very little lift and it takes me about 3 1/2 minutes per wing (10 gallons). It does it all the time .once in. I bought a second one as a spare I was so pleased.The construction is solid.My only issue was that it is so light I had to tape it to a small shovel to keep the hose from coming off ground turns off tanks.