A fluid application system (310; 900) for mixing a chemical with a diluent and spraying a mixture of the chemical and the diluent, the system comprising: a sprayer housing; a diluent reservoir (316; 926) for holding the diluent; a chemical container (361; 561; 661; 761; 861) for containing the chemical, the chemical container (361; 561; 661; 761) being a non-pressurized chemical container and including a chemical dip tube (357; 575; 675; 775; 861) for delivering chemical to a valve in an opening of the chemical container (361; 561; 661; 761; 861), the chemical dip tube (357; 575; 675; 775) being in fluid communication with a restriction orifice having a smaller inner diameter than an inner diameter of an adjacent section of the chemical dip tube (357; 575; 675; 775) wherein the valve has a closed position in which fluid flow is blocked from the opening of the container and the valve has an open position in which fluid can flow from the opening of the container, the valve being moved from the closed position to the open position when the chemical container (361; 561; 661; 761; 861) is attached to the sprayer housing; a manifold located in the sprayer housing, the manifold including a diluent inlet in fluid communication with the diluent reservoir (316; 926) and a mixing chamber of the manifold, the manifold including a chemical inlet in fluid communication with the chemical dip tube (357; 575; 675; 775) and the mixing chamber, the manifold including an outlet in fluid communication with the mixing chamber; and a pump assembly including a pump chamber in fluid communication with the outlet of the manifold, the pump assembly drawing a mixture of the diluent and the chemical into the pump assembly from the outlet of the manifold and then expelling the mixture of the diluent and chemical from a nozzle (430; 904) for spraying the mixture of the chemical and the diluent, wherein the valve includes a valve body (354; 554; 654; 754; 854), wherein the valve body (354; 554; 654; 754; 854) has an entry orifice, and characterized in that the restriction orifice is located in the entry orifice of the valve body (354; 554; 654; 754; 854). a sprayer housing; a diluent reservoir (316; 926) for holding the diluent; a chemical container (361; 561; 661; 761; 861) for containing the chemical, the chemical container (361; 561; 661; 761) being a non-pressurized chemical container and including a chemical dip tube (357; 575; 675; 775; 861) for delivering chemical to a valve in an opening of the chemical container (361; 561; 661; 761; 861), the chemical dip tube (357; 575; 675; 775) being in fluid communication with a restriction orifice having a smaller inner diameter than an inner diameter of an adjacent section of the chemical dip tube (357; 575; 675; 775) wherein the valve has a closed position in which fluid flow is blocked from the opening of the container and the valve has an open position in which fluid can flow from the opening of the container, the valve being moved from the closed position to the open position when the chemical container (361; 561; 661; 761; 861) is attached to the sprayer housing; a manifold located in the sprayer housing, the manifold including a diluent inlet in fluid communication with the diluent reservoir (316; 926) and a mixing chamber of the manifold, the manifold including a chemical inlet in fluid communication with the chemical dip tube (357; 575; 675; 775) and the mixing chamber, the manifold including an outlet in fluid communication with the mixing chamber; and a pump assembly including a pump chamber in fluid communication with the outlet of the manifold, the pump assembly drawing a mixture of the diluent and the chemical into the pump assembly from the outlet of the manifold and then expelling the mixture of the diluent and chemical from a nozzle (430; 904) for spraying the mixture of the chemical and the diluent, wherein the valve includes a valve body (354; 554; 654; 754; 854), wherein the valve body (354; 554; 654; 754; 854) has an entry orifice, and characterized in that the restriction orifice is located in the entry orifice of the valve body (354; 554; 654; 754; 854).