Disclosed is a dynamic, non-recycling pumping system for combining at least one chemical agent with a liquid carrier to produce a mixture for spraying on a target. Included in the subject device is a pump having an adjustable pressurized output line and an adjustable vacuum containing primary suction input line. A carrier reservoir supplies the primary suction line with the carrier that is mixed with a variable amount of chemical agent added through a secondary suction line connected to the primary suction line.