I have a bit of an odd filter problem. Last year I had an issue with it discharging water out the back wash when in filter mode. I rebuilt the valve assembly and it worked fine. Now I go and back wash it the proper way (shut pump off, run back wash for 45 seconds, shut off, rinse, shut off, turn back to filter and turn on). Now it will discharge out the back wash after I have back washed it even though it is in filter mode. The only way to stop it to disassemble the eight way assembly, than put it back on and tighten it down. I am thinking of putting a plug in the back wash port and calling it a day. Any other recommendations?