The Milwaukee SWITCH TANK 4 Gallon sprayer tank assembly is an interchangeable tank powered by the M18 SWITCH TANK powered base (Nt included). The sprayer tank assembly includes the pump, hose, and wand. The design allows tank assembles to be added for different spraying applications, eliminating cross-chemical contamination. It also enables the tank assembly to be replaced at a lower cost of ownership compared to replacing an entire sprayer. The 4 Gallon sprayer tank assembly has a dual diaphragm pump for longer pump life and Viton seals for increased durability against harsh chemicals. The sprayer tank also has a wide mouth opening for easier pouring and a strainer that filters debris from getting into the tank.