This diagram and parts list will help you repair your 23120 relief valve and bring your sprayer back up to pressure. We have included the high wear parts in a repair kit. The diagram has the parts from the kit marked with (RK) after the reference number. The kit is listed as reference number RK above. Please note that TeeJet's kit includes the spring, but we do not feel that the spring (being steel and quite heavy duty) requires frequent replacement.