I built this custom windmill about 4 years ago to water crops. It is made from angle iron and flat strap. The blades are 18 ga. galvanized steel and it has a 6 ft. dia. fan. We can hit water 7 ft. below ground where the base is at. I drove a 21 ft. piece of Sch. 40 2" pipe in the ground for a well casing and then have a 3/4" PVC sucker rod inside the steel pipe that connects to the red pump. The pump then drains into the 2500 gallon poly tank.