The present invention relates to a system for supplying washing inputs comprised by at least one hydraulic circuit comprising at least one water inlet pipe (2), at least one reservoir (3) of inputs and at least one inputs outlet pipe (4). It is further provided at least one water spreader (5) associated with at least one water inlet pipe (2) and at least one containment structure (6) associated with at least one inputs outlet pipe (4). According to the present invention, at least one gap (V1) is arranged between the front wall (31) of at least one reservoir (3) of inputs and the front wall (61) of at least one containment structure (6), at least one spraying means (51) of at least one water spreader (5) is directed to at least one gap (V1) arranged between the front wall (31) of at least one reservoir (3) of inputs and the front wall (61) of at least one containment structure (6), and it is generated at least one flow of inputs between the front wall (31) of at least one reservoir (3) of inputs and the front wall (61) of at least one containment structure (6).