Hi. I have changed the rubber o-rings for each of the electrodes but water is still leaking from the large titanium electrode (on the left when facing it). When I open it, it appears that there is a large amount of pressure that is forcing the electrode up even when the cover is tightened and the motor isn't running. Not sure what to do here. The pressure gauge of the pump is fine and there has been no error messages from the pump computer. Any ideas? Thanks