Patent ID: 8919678

Claim:
A system for filtering water for irrigation nozzles, comprising: a body having a cavity with an axis, a fluid inlet, a clean water outlet to allow delivery of fluid therethrough, and a debris outlet adjacent the clean water outlet and spaced apart therefrom; a fluid filter located in the clean water outlet for filtering water that passes therethrough and the clean water outlet; a plunger located in and movable relative to the debris outlet for selectively permitting water and debris to pass through the debris outlet; a water hammer cavity defined by part of the body and partitioned from the cavity such that an air bubble forms in an upper end thereof for forming a cushion of air to absorb shock in the body when there is a spike in water pressure in the body; and the water hammer cavity comprises an upper portion formed as a cylindrical tube, and a lower portion formed as a semi-spherical bulge.