The Gilmour Wheel Pump Sprayer (2- and 4-gallon models) pressurizes as the user walks or rolls it back and forth with the wheels carrying the weight. The spray wand is stored in the handle, which not only protects it when not in use, but also allows release of tank pressure by spraying inside the handle to return residual chemical solution to the tank. Other features of the sprayer include: UV-resistant tank, extra-wide mouth for easy filling, extra-long hose, pivoting handle for easy carrying, and safety-designed cap that releases pressure downward.