Trigger pump dispenser

A trigger pump dispenser comprising:

• a body;
• an outlet nozzle;
• a pump chamber comprising a rear wall and an outer wall;
• a piston for defining a variable volume in the pump chamber and movable between a retracted position of larger chamber volume and an inserted position of lesser chamber volume;
• a trigger coupled with the piston and movable from a starting position at which the piston is in the retracted position and a depressed position at which the piston is in the inserted position;
• biasing means for biasing the trigger towards the starting position, the pump chamber comprises an inlet port and an outlet port, the pump comprises a valve adapted to close the inlet port when liquid to be dispensed is in the pump chamber and the piston is moved from the retracted position to the inserted position as the pump chamber decreases in volume, the valve is adapted to open the inlet port when the liquid to be dispensed is drawn into the pump chamber through the inlet port as the pump chamber volume increases when the piston is moved from the inserted position to the retracted position, the valve is adapted to open the outlet port when the pump chamber decreases in volume as the liquid therein is dispensed through the outlet port and adapted to close the outlet port when the pump chamber increases in volume, the valve comprises a precompression valve operable to allow the liquid through the outlet port only after a predetermined elevated pressure is established in the pump chamber, wherein the inlet port is formed in the pump chamber outer wall, wherein an inlet path extending from the inlet port is perpendicular to a central axis of the pump chamber, and wherein the valve comprises a valve member, the valve member comprising an outer valve part and an inner valve part, the valve parts being formed separately and being connectable together, one of the valve parts provides an inlet valve function and the other of the valve parts provides an outlet valve function.