A trigger pump dispenser is made entirely from thermoplastic resin materials. It has a trigger (17) pivotally attached to the body (13) at its top end. The trigger is attached by a living hinge to a piston 16 movable within a pump cylinder (40), and is biased by a spring (18) to the retracted position shown. The spring is generally L-shaped and anchored to the body by its bottom leg so as to straddle the pump cylinder. A unitary valve member (15) located at the back of the pump cylinder provides one-way valves both for product dispensing and for product recharging into the pump chamber.