Iron pumps are ideally suited to pump non-corrosive liquids, like water or glycol. When pumping other liquids, more expensive materials such as stainless steel are used to limit corrosion. GETEM accounts for this increased cost by applying a material multiplier of 2.35 ( 2.35) to the surface pump cost relationship. Similarly, NETL (2002) recommends material multipliers from 1.43 to 2.00, depending on the stainless alloy used.