The 2” Recirculation Pump recirculates without any moving parts and is perfect where larger particles of waste are present.
The SludgeHammer Airlift pumps operate on the principle of air displacement of liquid within the pump’s vertical riser. The pump operates with pressurized air that forms a bubble within a containment pipe. This bubble forces liquid held in a vertical riser up when it expands to a sufficient size to overcome the weight of the liquid in the pipe.
Diameter of the vertical riser in the pump is a function of the desired height of lift and the potential for solid clogging. If larger particulate material is present the 2″ diameter riser eliminates the potential for clogging, however, height of lift is reduced. Expect lift up to 3′ with the 2″ diameter unit.