Sprayer and pressure washer comprising sprayer

A spray system for alternatively dispensing pressurized water and a mixture of pressurized water and surfactant, said system comprising:

• a hose having an inlet and an outlet;
• a pressurized water source in fluid communication with the inlet of the hose;
• a venturi mounted in fluid communication with the hose between the pressurized water source and the hose inlet, said venturi having an entrance, an exit, and a narrow section between said entrance and said exit;
• a container having an interior adapted for holding liquid surfactant, said container having a tube having a lower end positioned adjacent a bottom of the interior of the container and an upper end connected to the narrow section of the venturi so that surfactant in the interior is drawn upward through the tube to enter water passing through the venturi when a pressure differential across the venturi exceeds a predetermined value;
• a sprayer connected to the hose outlet, the sprayer comprising:
• a housing having a passage therethrough, said passage having one upstream portion, one middle portion, and a plurality of downstream portions including a first downstream portion and a second downstream portion;
• a first conduit fluidly connected to the first downstream portion;
• a second conduit fluidly connected to the second downstream portion, said second conduit having lower resistance to fluid flow than said first pressure conduit;
• a first valve mounted along the housing passage between the upstream portion and the middle portion, said first valve being selectively moveable between a closed position, in which the first valve blocks fluid flow through the housing passage, and an open position, in which the first valve allows fluid flow through the housing passage from the upstream portion to the middle portion;
• and
• a second valve mounted along the housing passage downstream from the first valve and between the middle portion and the downstream portions, said second valve being selectively moveable between a low flow position, in which the second valve allows fluid flow through the housing passage from the middle portion to the first downstream portion of the passage, and a high flow position, in which the second valve allows fluid flow through the housing passage from the middle portion to the second downstream portion of the passage.