Re-lubrication may be required for plug valves that leak through in the closed position and in order to keep the valve well-maintained. For A.Y. McDonald Mfg. Co. plug valves, we recommend the use of A.Y. McDonald Mfg. Co. Re-Lube Grease Sticks for compatibility. This product comes with 24 sticks in a box and is only for use with the A.Y. McDonald Mfg. Co. 558 re-lubrication tool. It will also lubricate valves of other manufacturers. Check with them for their recommended procedures and compatibility.

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