Ninja manufactures a safety check strut that can be installed in a Foster stainless steel quick disconnect that eliminates the hose “whipping” around in the air if it becomes disconnected while filling a cylinder. If the quick disconnect fitting is not locked onto the male quick disconnect, you could have a potentially harmful situation that could injure someone. This device will slowly vent the air out if it does become disconnected, but not at a rate where the hose will whip around in the air. These fittings are available in a 1/8″ female NPT thread, 1/8″ male NPT thread, or 1/4″ female NPT thread.
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