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It may have been. Most storage tanks are about 40 gallons. It may have a crack in the filter (if it has one) or it may have some plastic chip debris out of the tank that is affecting the diaphragms. Then it can come up to pressure like it should. The pump head can be taken off and checked, but be sure the water level in the tank isn't the problem. Please get back to me if you need more input from me here as all follow ups are included in our fee.
Just checking back in to see if you were able to resolve this or do you still need some additional input from me