These Udor 0903.49 Desmopan Diaphragms come in a package of 2. Use them to replace wearing or damaged diaphragms on the Udor Kappa 7/12, 15/12, and 18/12 Electric Diaphragm Pumps. Once you see the oil in the sight glass turns to a milky grey color, stop running the pump and replace the diaphragms immediately. Running a diaphragm pump with damaged diaphragms will eventually destroy the pump.
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