A float controllable valve responsive to a level of fluid having a housing with an internal chamber including an input supply opening and a discharge opening, a cylinder disposed over the discharge opening within the internal chamber of said housing, the cylinder having at least one radial input opening communicative to the housing chamber, and a valve seat communicative with the discharge opening, a control piston moveably disposed in said cylinder and having a first locking member in sealing contact with the valve seat, the piston and the locking member having a connecting channel formed therethrough, an auxiliary piston moveably disposed in said cylinder and adjacent to the control cylinder, and defining a first throttle opening between the auxiliary and the control pistons, and a second throttle opening between the auxiliary piston and the cylinder. A second locking member is coupled to the auxiliary piston and seals the connecting channel. A float is disposed within the housing chamber and coupled to the second locking member.