Granac submersible pumps are hermetically sealed pump devices that operates by pushing, rather than pulling, water during its pumping process. It is able to function in this manner because, like the name suggests, the pump is fully submerged in the liquid to be pumped. This allows the pump to be lowered down into a deep hole for pumping needs without running into problems like pump cavitation, which can damage moving parts by developing vapor bubbles. Granac Submersible Pumps are used in a wide variety of industrial and commercial applications.