in fig2 in which with u201c s u201d is indicated the length of said threads 6 14 respectively 7 15 and with u201c l u201d is indicated the total length of the assembled valve 1 which latter is affected by the disadvantages set forth hereinabove reference is now made to fig3 in which the valve 20 according to the present invention has a valve body 21 for example a likewise hot pressed brass body having a middle part 22 which is similar to the middle part 3 of the known valves as well as two end portions 23 24 which are obtained in one piece with the middle part 22 and which form the bodies of two quick couplings 25 26 the quick coupling groups 27 28 of which could have a conformation or designs at will that is both for metal pipes and for plastic hoses 38 39 shown with a dashed line from the fig3 is inferable that the elimination of the coupling threaded parts 6 14 and 7 15 of the valve and known quick couplings allows the achievement of a length u201c 1 u201d of the integrated valves 20 which is shorter with respect to the length u201c t u201d of the known assembled valves wherein is obtained 1 l u2212 2s another embodiment of a ball valve allowing a quick installation thereof according to the present invention is shown in the fig4.