The Campbell Mfg. Inc.514-RVC212 water filter cartridge 4 7/8in is a replacement cartridge for the Campbell Mfg. Inc.514-RVC212 water filter. This cartridge is made of durable plastic and has a replaceable filter. It is designed to help remove contaminants such as lead, mercury, and arsenic from water. The Campbell Mfg. Inc.514-RVC212 water filter cartridge 4 7/8in is a replacement cartridge for the Campbell Mfg. Inc.514-RVC212 water filter. This cartridge is made of durable plastic and has a replaceable filter. It is designed to help remove contaminants such as lead, mercury, and arsenic from water.