Abstract: A temperature responsive pressure relief filter vent device for a storage drum having an annular sleeve member composed of a fusible material, such as a polymer or low melt temperature metal. The mating portion of the device is externally threaded and the fusible sleeve member is internally and externally threaded. With this structure, the fusible sleeve is mated with the eternally threaded mating portion and this assembly is then mounted into the threaded opening of a drum, thereby securing the pressure relief device onto the drum. Under elevated temperature conditions, as the temperature of the fusible sleeve approaches or reaches the melting point of the fusible material, the sleeve will soften or melt sufficiently such that pressure buildup within the drum causes the pressure relief device to be expelled from the drum.

Abstract: A catch basin filter having a bag member with a plurality of compartments, the compartments containing heavy metal recovery material, whereby heavy metals in liquid passing through the compartments are filtered from the liquid stream or neutralized.