Spray wand

A spray wand comprising:

• a hollow tubular main body having an input end and an output end;
• a nozzle mounted on the output end of the main body;
• and
• a valve assembly configured to mount the input end of the main body, the valve assembly comprising:
• a housing having a interior space and an input conduit for coupling the valve assembly with a fluid source;
• a sealing piston biased within the input conduit toward a sealing position thereof;
• and
• a valve core having a column rotatable within the interior space of the housing and a handle extending from the column, the valve core being rotatable between at least one open position corresponding to an open condition of the valve assembly and at least one closed position corresponding to a closed condition of the valve assembly;
• wherein, upon rotation of the column to at least one open position thereof, the sealing piston biased within the input conduit is pressed from the sealing position and
• wherein, upon rotation of the column to at least one c on thereof the sealing piston biased within the input conduit is pressed by a contoured section of the column from the sealing position.