11 Apparatus and installations for the distribution of drinking water, namely, water filters, manifolds, valves; sanitary installations, including their fittings and framework, namely, pressure regulators for sanitary installations; central heating installations; central heating installation pipework, namely, pipes for heating boilers and floor and radiator heating systems; regulator valves, pressure regulators for sanitary installations; mixing taps being mixer taps for water pipes; parts of heating installations, namely, heating control units being cabinets used to control temperature for heating; water heating equipment, namely, hot water heaters, water bed heaters, feed water heaters; central heating boilers; valves radiators, manifolds; mixers, mixer faucets for water pipes; air vents, namely, air vents for water fittings; thermostat valves and heads being thermostatic valves; retention valves, valves as part of radiator; complex valves for radiators; selective valves, valves as part of radiators; parts of domestic or industrial installations, namely, filters for drinking water and heating systems