JEGS Anti-Corrosion Plug
JEGS Zinc Anode Anti-Corrosion Plug is designed to help protect your cooling system from corrosion. The elements will "attack" the plug before (instead of) your system's aluminum components, thus extending their service life. For use in most radiators and overflow cans where a drain petcock fitting may currently be installed.
JEGS Performance Products 1/4" NPT Anti-Corrosion Plug
1/4" NPT Anti-Corrosion Plug