To provide a dual check-relief valve capable of performing the function of a hydrostatic high pressure relief valve and a check valve.

The new valve has two poppets separated by a spring that are within two seats within a guide and secured by a plug. The relief pressure setting is performed by adjusting the seats. The dual check and high pressure relief valve has three separate passageways that allow a fluid to flow between different combinations of the passages depending on the function desired within the hydrostatic circuit. A dashpot is provided between the two poppets to provide positive dampening of the system.