A spray nozzle (10) has a nozzle body (20) with an inlet (24) and an outlet (26). The inlet (24) is attachable to a hose (2). The outlet (26) is configured to receive a chemically-containing cartridge (70). A forwardly-disposed trigger (30) is finger-actuated and operates the valve (52) of a first valve assembly (50) to control water flow through the nozzle (10). An inlet conduit (56) connects the first valve assembly (50) to a second valve assembly (60). The second valve assembly (60) is thumb-actuated by a toggle (40) to pass water through the nozzle (10) as clean water supplied to the nozzle (10) via the hose (2) or through the nozzle (10) as chemical-added water that is created by a venturi-induced assembly (80) contained within the cartridge (70).
