The principle of the self-priming pump is to empty the air in the pump chamber and the water inlet pipe, and let the atmospheric pressure bring up the water pressure. Because one atmospheric pressure is equivalent to 10 meters, it is impossible to exceed 10 meters. The suction range of all Self-priming pumps is about 9 meters, and if it exceeds 9 meters, it cannot be sucked up. Please confirm the actual required suction range before purchasing.