Two stage variable flow valve assembly

A valve assembly comprising:

• a body defining an internal chamber having a fixed wall at a first end and a discharge opening at a second end, said internal chamber being divided into a first chamber and a second chamber by an inwardly extending flow restrictor portion, said first chamber being located adjacent said wall and having an inlet for receiving a fluid, and said second chamber being located adjacent said discharge opening;
• a valve extending axially through and being movable within said internal chamber, said valve having a shaft of varying diameter operatively associated with the flow restrictor portion, with one end of the shaft connected to a bulb, said bulb being positioned in said second chamber, and said shaft extending from said bulb and second chamber through said first chamber via said restrictor portion and through said wall, said bulb being engagable with said discharge opening to seal said discharge opening when at least a portion of said shaft of varying diameter is in sealing association with at least a portion of the flow restrictor portion;
• and
• means for actuating said valve between a first fixed position, wherein fluid does not flow through the body, and a second fixed position, wherein the flow of fluid through said flow restrictor portion and discharge opening is permitted, said actuating means further providing means for variably selecting-the second fixed positions,
• wherein in the second position, the flow restrictor portion and discharge opening are held open to allow fluid to flow through the body.