GP-8A Grout Pump from Kenrich Products, Inc. Created: February 12, 2009 Air-poweredTwin diaphragm, self-priming pumpFor filling concrete block and hollow metal door frames4.6-gal. hopper capacity1 1/2-in. hoseControls include start/stop switch, adjustable speed and pressure valve Want to know more about this product? Click here to request more information about GP-8A Grout Pump from Kenrich Products, Inc. .