Check Valve In Line Inlet (In.) 3/8 in (F)NPT Outlet (In.) 3/8 in (F)NPT Cast Brass Max Pressure (PSI) 250 psi Cracking Pressure (PSI) 0.1 psi Hex Size (In.) 1 in Flow Range Free Air (CFM) 0 to 22 cfm Max Temp (F) 450 Degrees F Vertical or Horizontal Mounting Tap Size 1/8 in for Pressure Switch Unloader Connection Length (In.) 2 3/16 in Stainless Steel Spring Material Disc Positive Seating Fluoropolymer for Maximum Air Flow Flouropolymer Poppet In-Line Check Valve