GB Series pumps are equipped with vortex impeller. The benefit of a vortex impeller over a channel impeller is the minimized risk of clogging. A vortex impeller is also a better choice and pumped liquid has a high content of sand. These pumps have large free passage up to 3½” in diameter suitable for lifting of sewage liquid, civil waste and industrial waste water containing solids and viscos materials, heavy muds or fermented sludge.
