Abstract: A reset relief valve with dampening reservoir having a piston disposed in fluid flow-blocking relationship between an inlet port and the outlet port of the body and a second position at which the piston is removed from the fluid flow-blocking position, the piston partially defines an enclosed first chamber and at least one flow passageway extending between the chamber and a reservoir chamber mounted on the body for controlled flow of hydraulic fluid to dampen the movement of the piston upon activation, The reservoir has a pressure monitor to measure fluid pressure in the system, a sight glass and index to view and measure the hydraulic fluid and a tubular flow passageway.