11 Water well system accessories and components, namely, cables and support rope, splice kits, torque arrestors, piping adaptors, pitless adaptors, well seals, adaptors, check valves, foot valves, pressure switches, pressure gauges, well points, air volume controls, tank tees and assemblies, relief and snifter valves, sand filters, hoses and mechanical seals; media for filtration and biological treatment of water, waste water, and sewage, namely, cartridge filtration units and filters; components for water systems and conditioning equipment, namely, tanks