Safety clamp for a chemical drum is recommended for all water treatment applications, including where a high strength acid or base are involved. Recommended for all cleaning & sanitation applications, including feed systems where multiple tubes and or probes are being used in the same bung opening. Clamp can be applied or removed at any time during operation; Fits all Standard UN chemical drums, 15 gallon to 55 gallon; Includes an enhanced, cross linked, closed cell, copolymer filter that provides optimum chemical resistance; Use with a drum seal to tag and record when drum is in use.