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Old 09-23-2011, 01:24 PM
oldred oldred is offline
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I agree that the right procedure is to run the adjusting screws out when turning off the tanks but with the pressure set at a reasonable range it rarely causes a problem and most folks just shut the valve off and let it go, still as DanielC said the RIGHT way is to unscrew the adjuster. What I have seen happen many times is when the tank gets low and the pressure drops someone will screw the regulator in farther in an attempt to drain the last bit of gas from the tank then the regulator can rupture internally when the tanks are switched, this can still ruin a regulator even if it is backed back out before changing tanks because it can be physically damaged from being run in too far. If the regulator is screwed in too far and a full tank is opened on it the results are usually just what you described. Not saying that is what happened to yours but it is a common cause of regulator failure. Sometimes however just like most anything else a regulator can fail for no apparent reason and if it ruptures internally it will allow full pressure to the regulated side which will cause the problem you seem to have. The bottom line is you need to either have it rebuilt or just buy a new one because parts are very hard to get, for liability reasons the manufacture will not sell OEM parts except to a certified repair facility but after-market repair kits can sometimes be found.
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