Caleffi is one of the Italian leading companies for the production of components which have to be plugged into heating, air conditioning, and water-sanitary systems. The success of this company can be attributed to the attention that is given in every single production process, from the planning to the fulfillment and after-sale assistance as well. All components, like Caleffi’s thermostats, Caleffi’s switchboards and Caleffi’s pressure reductions, are elements that able to make a difference within a plant. However, what always really distinguished Caleffi is valves world, which thanks to this company took another form: from the one-pipe valve to the safety valve. The hydraulic world is not the same since Caleffi came into the market.