Check Valve In Tank Inlet (In.) 1/2 in OD Outlet (In.) 1/2 in (M)NPT Brass Max Pressure (PSI) 450 psi Cracking Pressure (PSI) 0.1 psi Hex Size (In.) 7/8 in Flow Range Free Air (CFM) 0 to 20 cfm Max Temp (F) 400 Degrees F Vertical or Horizontal Mounting Tap Size 1/8 in for Pressure Switch Unloader Connection Length (In.) 2 7/8 in Stainless Steel Spring Material Flouropolymer Poppet Thread Coating Vibra Seal In-Tank Check Valve