The Pentek GP803CS3 bag filter vessel system is made out of carbon steel housing material. The Pentek GP803CS3 carbon steel bag filter housing has a 3-inch inlet/outlet and uses Size number 3 filter bags. Size number 3 filter bags are 4.1-inch W x 8-inch L. The Pentek GP803CS3 bag housing has a stainless steel filter basket, a viton cover seal, and a hinged cover with swing bolt closures. Carbon steel housings are good for high pH water. Use this Pentek GP803CS3 filter bag housing for commercial, industrial, and process applications such as coolants, chemicals, solvents, process water, ground water, edible oils, lube oils, and hydraulic oils. Carbon steel is especially effective in petroleum based applications and with soaps and cleaning solutions.