A valve for use in an inflation/deflation system, comprising: a valve body having a first inlet/outlet port fluidly connectable to a second inlet/outlet port; a valve member movable within the valve body between a first position and a second position for fluidly connecting or disconnecting the first inlet/outlet port and the second inlet/outlet port; and a fluid-operated damper operably connected to the valve member to dampen movement of the valve member from the second position to the first position; wherein, when in a first state, the first inlet/outlet port is fluidly disconnected from the second inlet/outlet port by the valve member; wherein the valve is configured to transition to a second state when a fluid pressure at the first inlet/outlet port is at or above a prescribed pressure threshold, and when in the second state the first inlet/outlet port is fluidly disconnected from the second inlet/outlet port; wherein, when the valve is in the second state, lowering the fluid pressure below the prescribed pressure threshold causes the valve to transition from the second state to a third state; wherein, when in the third state, the first inlet/outlet port is fluidly connected to the second inlet/outlet port while the damper dampens movement of the valve member from the second position to the first position to maintain the valve in the third state for a prescribed period of time; wherein the damper includes a damper fluid chamber; wherein the valve further includes a vent passage fluidly connected to the damper fluid chamber, and a vent valve configured to open and close the vent passage, such that when the vent passage is opened by the vent valve fluid is permitted to vent from the damper fluid chamber; wherein the valve body forms a primary chamber, the primary chamber being fluidly connectable to the first inlet/outlet port and the second inlet/outlet port; characterised in that the vent passage fluidly connects the damper fluid chamber to the primary chamber. a valve body having a first inlet/outlet port fluidly connectable to a second inlet/outlet port; a valve member movable within the valve body between a first position and a second position for fluidly connecting or disconnecting the first inlet/outlet port and the second inlet/outlet port; and a fluid-operated damper operably connected to the valve member to dampen movement of the valve member from the second position to the first position; wherein, when in a first state, the first inlet/outlet port is fluidly disconnected from the second inlet/outlet port by the valve member; wherein the valve is configured to transition to a second state when a fluid pressure at the first inlet/outlet port is at or above a prescribed pressure threshold, and when in the second state the first inlet/outlet port is fluidly disconnected from the second inlet/outlet port; wherein, when the valve is in the second state, lowering the fluid pressure below the prescribed pressure threshold causes the valve to transition from the second state to a third state; wherein, when in the third state, the first inlet/outlet port is fluidly connected to the second inlet/outlet port while the damper dampens movement of the valve member from the second position to the first position to maintain the valve in the third state for a prescribed period of time; wherein the damper includes a damper fluid chamber; wherein the valve further includes a vent passage fluidly connected to the damper fluid chamber, and a vent valve configured to open and close the vent passage, such that when the vent passage is opened by the vent valve fluid is permitted to vent from the damper fluid chamber; wherein the valve body forms a primary chamber, the primary chamber being fluidly connectable to the first inlet/outlet port and the second inlet/outlet port; characterised in that the vent passage fluidly connects the damper fluid chamber to the primary chamber.