I just purchased a Multi Valve and when I started up the pump and it got up to pressure water started leaking out of the seam at the top of the valve cover. I checked the screws and they were tight. I then took off the cover and the gasket looks good. The water is definitely coming out of the seam and not a crack. It seems like the water has no were to go or a clog in the sand tank? Thank you for your time and please advise.
Joel