Water faucets, water taps, water faucet and water tap kits, including multiple dispenser kits and insulated water outlets; water tanks, including stainless steel water tanks; water purification and filtration units, including multiple cartridge filtration systems, sediment removal systems and chemical removal systems, all the foregoing not being for effluent, sewage and waste water treatment; water heating units; water chilling units; combination boiling/chilled water units including combination boiling/chilled water purification units; combination boiling/chilled water filtration units; parts and accessories therefor such as are in this class