A hydraulic assembly (1; 100) for controlling a liquid comprising a plurality of hydraulic modules (2; 20) connected to one another; the plurality of hydraulic modules (2; 20) comprising: • first hydraulic modules, each comprising a first base element, in which a liquid runs in use; the first base element comprising a first base body, a first connector and a second connector; the first connector and the second connector being mutually couplable and configured so as to define a quick coupling; the first connector and the second connector being made in one piece with the first base body; wherein the first base bodies of the plurality of first hydraulic modules have identical construction; • second hydraulic modules, each comprising a second base element, in which a liquid runs in use; the second base element comprising a second base body, a third connector, a fourth connector and a fifth connector; the third connector and the fourth connector being mutually couplable and configured so as to define a quick coupling; the third connector being also couplable to the second connector of one first hydraulic module; the fourth connector being couplable also the first connector of one first hydraulic module; the fifth connector being couplable either to the third connector or to the fourth connector or to the first connector of a first hydraulic module; the third connector, the fourth connector and the fifth connector being made in one piece with the second base body; wherein the second base bodies of the plurality of second hydraulic modules have identical construction; the hydraulic assembly further comprising: • a first interactive element, coupled to the first base body of the first base element and configured to interact with the liquid running in the cavity of the first base element; the first connector, the second connector and the interactive element being in fluid communication with the cavity; • a second interactive element, coupled to the second base body of the second base element and configured to interact with the liquid running in the cavity of the second base element; the third connector, the fourth connector and the interactive element being in fluid communication with the cavity; • at least one joint element configured to connect a first base element of the first hydraulic modules to another a first base element, or a second base element of the second hydraulic modules to another second base element, or a first base element of the first hydraulic modules to a second base element; wherein the joint element is T-shaped or L-shaped. • first hydraulic modules, each comprising a first base element, in which a liquid runs in use; the first base element comprising a first base body, a first connector and a second connector; the first connector and the second connector being mutually couplable and configured so as to define a quick coupling; the first connector and the second connector being made in one piece with the first base body; wherein the first base bodies of the plurality of first hydraulic modules have identical construction; • second hydraulic modules, each comprising a second base element, in which a liquid runs in use; the second base element comprising a second base body, a third connector, a fourth connector and a fifth connector; the third connector and the fourth connector being mutually couplable and configured so as to define a quick coupling; the third connector being also couplable to the second connector of one first hydraulic module; the fourth connector being couplable also the first connector of one first hydraulic module; the fifth connector being couplable either to the third connector or to the fourth connector or to the first connector of a first hydraulic module; the third connector, the fourth connector and the fifth connector being made in one piece with the second base body; wherein the second base bodies of the plurality of second hydraulic modules have identical construction; • a first interactive element, coupled to the first base body of the first base element and configured to interact with the liquid running in the cavity of the first base element; the first connector, the second connector and the interactive element being in fluid communication with the cavity; • a second interactive element, coupled to the second base body of the second base element and configured to interact with the liquid running in the cavity of the second base element; the third connector, the fourth connector and the interactive element being in fluid communication with the cavity; • at least one joint element configured to connect a first base element of the first hydraulic modules to another a first base element, or a second base element of the second hydraulic modules to another second base element, or a first base element of the first hydraulic modules to a second base element; wherein the joint element is T-shaped or L-shaped.