11 Plumbing fittings, namely, roof drains, sanitary floor drain and waste receptor, indirect waste receptors, namely, floor sinks; metal floor, area, and roof drain receptors for drainage of water and liquids; metal water hammer arresters for controlling and absorbing water hammer or knock in potable water pipelines; non-freeze hydrants; grease recovery device (GRD) in the nature of an automatic grease trap containing skimmers and strainers for removing food particles, fats, oils and greases from drain systems of commercial kitchens and other food processing facilities; automatic grease trap having a special membrane to facilitate the introduction of bacteria, and providing automatic draw-off of fats, oils, and greases; vacuum plumbing systems for the collection, conveyance, and disposal of waste comprised of pipes, waste storage tanks, vacuum pumps, waste accumulators, extraction valves, and electronic valve controllers; drinking fountains; water coolers; remote water chillers for drinking fountains; plumbing fittings, namely, stationary water fillers for automobile radiators, railway water-service boxes, horse-watering fonts, and bubbler heads; electric warming pan for heating paraffin wax; mop sinks; plumbing fittings, namely, recessed hose bibbs; backwater valves to prevent sewage backflow into buildings, and plumbing sink traps; grease trap in the nature of a grease and oil interceptor-separator and a waste receptor to intercept, store and enable the removal of food particles, fats, oils, and greases from the wastewater system; water hammer arresters, namely, devices for controlling water hammer or knock in pipelines; non-freeze water hydrants; plumbing fittings, namely, floor, area and trench drain receptors of earthenware, polymer concrete and/or fiberglass; hydrants; wall hydrants, plumbing fittings, namely, recycled polyethylene and/or polypropylene receptors for floor, area, roof and surface drains and for integration into counter tops; plumbing fixtures, namely, toilets and lavatories, bedpan flushers and combination fixtures comprising toilets, lavatories, and cabinets therefor, for use in prisons, hospitals, schools, and other institutions; free standing and wall mounted multi-person hand wash stations with circular and semi-circular housings for plumbing pipes, liquid soap systems and manually operable water control valves and sold as a unit for use in prisons, hospitals, schools, and other institutions; sanitary installations, namely, group hand-washing stations comprised of hand wash basins for use in prisons, hospitals, schools, and other institutions; combination plumbing fixtures, namely, combinations of a toilet, lavatory and cabinet therefor for use in prisons, hospitals, schools, and other institutions; combination plumbing fixtures, namely, combinations of a water closet and a cabinet therefor for use in prisons, hospitals, schools, and other institutions; wash stations, namely, sinks and faucets for use in prisons, hospitals, schools, and other institutions; multi-showers in the nature of multi-person showers containing multiple shower heads and shower control valves for use in prisons, hospitals, schools, and other institutions; combination and individual freestanding shower heads and shower control valves for use in prisons, hospitals, schools, and other institutions; flow control valves for faucets, showers, and other plumbing installations for use in prisons, hospitals, schools, and other institutions; plumbing fittings, namely, drain trap primer valves for use in saving water and mixing valves for use in prisons, hospitals, schools, and other institutions; epoxy finish sold as a component of plumbing fixtures, namely, toilets, lavatories, urinals, lavatory-toilet combination fixtures, shower fixtures, drinking fountains and hand-washing fixtures for use in prisons, hospitals, schools, and other institutions