Apparatus and installations for heating, cooling, water supply and sanitary purposes; Water conveying sanitary plumbing components in the nature of pipes, hoses, fittings being parts of sink, basin shower or tub faucets, namely faucet aerators, faucet aerator holders, faucet aerator interfaces, adaptors, connecting pipes and hoses, protective covers for connecting hoses of faucets, hose and pipe couplers, manifolds, valves, filters, flow regulators, backflow prevention devices, diverters, plumbing clips and fixings; adaptors for faucet valve cartridges; Parts of sanitary installations, namely, aerators, diverters, no-drip hoses, valves, on/off controls, hot/cold water mixing valves; pressure controls, pressure balancing valves, pressure limiters, swivel adaptors, washers, adapters; Flow straighteners; Stream shapers; Flow regulators; Check valves, backflow preventers; Connecting hoses; Shower hoses; Kitchen pullout hoses and motion hoses; Faucet outlet hoses and discharge hoses; Hoses for sanitary, cooling, irrigation and heating installations; Flexible pipes and pipe connectors being parts of plumbing installations, in particular of faucet, sink, basin, bath, shower, water closet, toilet, industrial and household appliance plumbing installations; Kitchen faucet sprayers; bypass valves for sanitary installations; Water faucet spout accessories, namely, swivel adapters; Shower faucet accessories, namely, swivel adapters, Pullout kitchen faucet hoses accessories, namely swivel adapters; plumbing fittings, namely hose and pipe connectors; Plumbing fittings, namely, couplers, spouts; Plumbing fittings, namely, filters and strainers; Aerator screw-in aids, aerator screw-in adapters; housings for faucet aerator inserts; Aerator housings for faucets; Taps and faucets; plumbing fittings, namely tub, basin, kitchen and shower mixers and tub fillers; Sanitary installation safety devices against backflow in the nature of air gap fittings, vacuum breakers or vents; air gaps with injector; Showerheads; Shower systems; Flexible pipes.