Providing the same function as the Universal Check Valves, Fabricated Check Valves provide a less expensive, lighter weight alternative to the racer who won't be reconfiguring their plumbing. Fabricated Check Valves are most commonly found on Drag, Sprint, Midget and Outlaw cars. Radiator check valves are also designed to work with the Water Circulators and Drag Chillers as well as Portable Engine Heaters and Combo Heaters. Check valves are used to insure directional water flow through the entire cooling system. They are designed to fit the current radiator plumbing and are available in AN and push-on hose sizes.