Thermostatic mixing valves; shower mixing valves; mixing valves for faucets; mixer taps for water pipes; water control valves for faucets; valves as part of radiators; manually-operated plumbing valves; plumbing fittings, namely valves, cocks, sink traps, ball valves, float valves, ball cocks, isolation valves; installations for central heating; underfloor heating apparatus and installations; heating systems composed primarily of tubes, pipes and pre-assembled manifolds through which cold or low temperature water circulates; heating systems composed primarily of tubes, pipes and manifolds through which warm or high temperature water circulates; water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water; water purification and filtration apparatus; apparatus for the separation of gases being air filtering installations; water conditioning units; water softening apparatus and installations