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Old February 13th, 2013 #14
Jimmy Marr
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Join Date: May 2010
Location: Jew S. A.
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Jimmy Marr

I'm guessing you'll find a Schrader valve on the bottom of the expansion tank for the inflation of the air bladder. I'd look for leakage at a weep hole in that area.

If no weep hole, pump air into the Schrader and listen for bubbling which would indicate ruptured diaphragm.