Features 651830Filter Element keeps foreign matter from entering lower endAdapts to 91020-1 or -2 pipe extension 66480Filter and check valve assembly constructed of 316 Stainless Steel, assembly has 1-inch NPT(F) connections and 40-mesh screen. 4-3/4-inch (121 mm) long x 2-1/8-inch (54 mm) in diameter.Used with suction tubes when fluid is corrosive and viscosity requires a foot valve for positive priming.