Help! Went to backwash today after finally getting the water crystal clear (except for a thick coat of pollen on top) and noticed that my water level was dropping rapidly. Checked the waste line and sure enough, it was flowing out. I tried several of the different settings, but still all going to waste. Note: the valve is about 12 years and is very difficult to turn. I have not yet taken the cover off (been reading up on the valve and searching to see if others have experienced the same issue. Besides the cost, I'm hoping it doesn't have to be replaced due to all of the PVC lines that will have to cut, spliced, etc.