Abstract: Provided is a temperature-sensitive fluid flow interruption device for use in operational connection with a normally-closed poppet openable by overcoming a closure force. The device may comprise an elongated housing, an elongated displacement member, a spring, and a retention cap. An elongated housing may comprise an elongated first channel. An elongated displacement member may be engaged with said elongated first channel and may comprise a longitudinal axis, a first spring retention surface, and a poppet engageable end. The poppet engageable end may be adapted for engagement with said poppet and may be engaged with the housing in a manner determined by the temperature of the temperature-sensitive fluid flow interruption device with respect to a predetermined temperature. A spring may be engaged with the first retention surface. A retention cap may be engaged with the housing and may comprise a second retention surface engaged with the spring.