Patent ID: 7766262

Claim:
An irrigation system comprising: at least one water supply pipe; at least one sprinkler device mounted to the at least one water supply pipe; a valve attached to a longitudinal end of the at least one water supply pipe, the valve comprising: a valve body having an inlet and an outlet, wherein the inlet and the outlet are positioned substantially in-line with the at least one water supply pipe; and a moveable sealing member disposed within the valve body, the moveable sealing member being moveable between a first position and a second position, the moveable sealing member configured to prevent fluid flow from the inlet to the outlet in the first position and to allow fluid flow from the inlet to the outlet in the second position, the moveable sealing member biased to the second position and configured to move automatically from the second position to the first position when a magnitude of a pressure differential between the inlet and the outlet of the valve body reaches a predetermined threshold value; and a valve stem extending through at least a portion of the valve body, the valve stem configured to engage the at least one water supply pipe, the moveable sealing member disposed around at least a portion of the valve stem and configured to slide longitudinally along at least a portion of the valve stem between the first position and the second position.