Abstract: An improved release device for safety equipment has a housing including a body, a cover attached thereto with a resilient flexible membrane inserted therebetween, and an attachment portion releasably secured to the cover. The cover has shoulders protruding radial inward within the bore. The release device has a cap rigidly mounted to the membrane and an annular gap exits between the shoulders and the cap. The attachment portion has elastically flexible legs with enlarged ends that extend into the bore. The ends deflect inwardly when engaged by the shoulders and then spring outwardly and are retained in a recess below the gap because the enlarged ends are wider than the gap. When the pressure forces the membrane to move away from the bore, the cap moves with it to enlarge the gap and allow the legs of the attachment portion to escape from the cover, whereby the safety equipment is released when the water pressure is sufficiently high. The device is testable and may be reset and reused at will.