I have an R190 laser sand filter with a 6 port diverter valve, 7 port if you count the winterize position. My issue is that it leaks out the drain port after backwashing or running it to vacuum to drain. It takes several attempts at selecting filter port for it to stop leaking to drain. It appears that I might need part # 4628-13A which is mfg. code 39251509k. Would those parts solve that problem or would I need something else. I have been told that it is usually the spring or the gasket that the spring pushes against that is the problem.
