Abstract: The invention relates to a device for preparing aqueous solutions intended to be sprayed via a manifold including two or more nozzle sections, on a surface from a mixture of water and two or more additives. Said device includes: —a water vessel (2); —a pump (6) connected to each section (4, 5); —a first pipe (8) connecting the water vessel (2) to the pump (6); —a second pipe (9) with as many parallel arms between the pump (6) and each section (4, 5); —at least two additive vessels (10, 11); and—a means (12) for metering the amount of each additive that is to be injected into the second pipe (9) and mixed with the water.

Abstract: The invention relates to a device for preparing aqueous solutions intended to be sprayed via a manifold including two or more nozzle sections, on a surface from a mixture of water and two or more additives. Said device includes: —a water vessel (2); —a pump (6) connected to each section (4, 5); —a first pipe (8) connecting the water vessel (2) to the pump (6); —a second pipe (9) with as many parallel arms between the pump (6) and each section (4, 5); —at least two additive vessels (10, 11); and—a means (12) for metering the amount of each additive that is to be injected into the second pipe (9) and mixed with the water.