If you will be rinsing your regulator after removing it from the cylinder, you must make sure that the dust cap is firmly in place.
A dust cap is a gently curved dome mounted either in concave or convex orientation over the central hole of most loudspeaker diaphragms.
Thus, if you will be rinsing your regulator after removing it from the cylinder, you must make sure that the dust cap is firmly in place.
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