A fluid filter having a filter canister, a fluid inlet, a fluid outlet, filter media, and a pressure sensitive valve assembly is described. The pressure sensitive valve assembly comprises an orifice surround, a pressure relief spring, and a valve plug comprising a valve head and first and second retention legs. The first and second retention legs of the valve plug are spaced apart from one another, extend from a leg base positioned at the sealing side of the valve head to a distal end of the retention leg, and comprise respective seating regions, tapered transition regions, and clearance regions. Each of the respective seating regions comprises a spring engaging hook structurally configured to receive a seating portion of the pressure relief spring. The pressure relief spring is compressed between the orifice surround and the spring engaging hooks to bias the pressure sensitive valve assembly towards the closed state.