System and valve unit for mixing-delivery sanitary water and/or purified water

A combined tap-group for a selective supply of hot, cold, mixed sanitary water and purified water, comprising

• a base body having a first delivery duct provided with a first spout for sanitary water and a second delivery duct provided with a second spout for purified water, said a second delivery duct extending parallel and coaxially to said first delivery duct along a first axis of said base body, said base body being conformed with
• a first seat for housing a mixer tap for delivering hot, cold and mixed sanitary water, said mixer tap being in communication with said first delivery duct and with a first inlet channel for cold water and with a second inlet channel for hot water in communication through the mixer tap with said first delivery duct, said first inlet channel for cold water and said second inlet channel for hot water being obtained inside said base body and extending parallel to said first axis from a lower end of said base body;
• a second seat for housing a control tap for controlling the flow of purified water, said control tap being in communication with at least one inlet channel for purified water and with the second delivery duct, said control tap and said mixer tap being place on opposite sides of said base body with respect to said first axis and being mutually aligned along a second axis transverse to said first axis;
• in said base body there being obtained an additional outlet channel for cold sanitary water, said additional outlet channel being directly machined inside the same base body and being branched from the first inlet channel for cold sanitary water, said additional outlet channel extending parallel to said first inlet channel and said second inlet channel.