Is "filter drain" the correct term for the pipe the water comes out of when you backwash or rinse? That is the pipe I am asking about.
There is a small amount of water coming out of it when I am filtering. It is about 1 cup every 2 hours, or 3 quarts a day. How much of a problem is this? Does it need to be fixed? I had the filter valve replaced just a few months ago.