Avoid the hassles of welding while gaining the functionality of -AN fittings when it comes to plumbing your new engine! CVF's patent pending Radiator Clamp on Compression -AN Fittings brings you the strength of a weld but the functionality and ease of a bolt on fitting! Avoid hose clamps on your water pump by using the same compression fitting on the inlet! These fittings begin with a simple clamp and O-ring but then allow for additional compression to give you a rock solid connection rated for at least 120 PSI and pass all -AN standards!