ABSTRACT In the world industry, to move a liquid material from one place to another, a pump is used, so the pump plays a very important role. A pump is a machine/equipment used to lift liquids from a lower surface to a higher surface or move liquids from a place of low pressure to a place of higher pressure. At PT. RAPP, in the water treatment plant (WTP) unit, has 2 PAC Pumps where one pu…