The type of water you'll be moving will determine which type of pump you need.
If you're just removing water, a utility pump will work.
But if you need to move water with solids, debris or sand in it, go with a trash pump.
Submersible Utility Pumps
Utility pumps are versatile pieces of equipment. You can remove standing water, empty clogged sinks or drain window wells and other areas. The inlet size will dictate how quickly you can remove the water. The more water the pump can take at a time, the faster it can disperse it.
Utility pumps with a float switch makes the use more automatic, as the float will kick the pump on and off so you don't have to watch it. Depending on your application and time involved in the project a float switch can be a real life saver.
If you need to remove water with debris and solids in it, get a trash pump instead.