I posted last year about trying to find the leak in my (Riviera) water system. I took another stab at it this weekend and found the problem. now I need to find the solution. The pics below show the tank (could not identify the brand), the problem valve, and the faulty piece that I presume is meant to prevent water from spurting out the valve at the base of the tank. I do not understand how the plumbing is supposed to work, nor what the function of this valve is, but what was hapening is the black tubing attached to this valve was led into the aft bilge and was freely spurting water from the tank when the pump is activated. So I need to replace the faulty piece, I think. Any wisdom to assist in fixing this - including possible source for the part, or explanation of the function of this valve, much appreciated. Wll be wonderful to have a hot shower!