I have a sand filter with a side mounted multi port valve. The filter has a clear plastic top (screw cap 12" dia) with a pressure guage on top of it. When i backwash the water in the filter top/cap turns brown and after a few minutes not 45 second clears about 80-85%. i also have a site glass near the multiport valve on the waste pipe. This site glass (about 1" dia never looks dirty. When i rinse about 45 seconds the filter top clears up nicely.
My question is should the site glass look dirty same as the filter top glass?
My question is should the site glass look dirty same as the filter top glass?