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How do i change the domestic diaphragm on a potterton performa 28
ian c, September 2009
power off, cold water off, open hot taps,, unscrew microswitch, disconnect front impulse tube, undo the 6 screws, remove the old diaphragm & re-assemble in reverse order.

Ian, September 2009
link Click here to see other fixes for Potterton Performa 28.