Here’s how to winterize a pool sand filter with a multiport valve | Swim University

Hey Pool Owners! Here’s how to backwash your sand filter in 2 minutes. First, shut off your filter. Then attach the backwash hose to your filter’s waste or backwash port. Turn your multiport valve to Backwash. Then turn your system back on. Water should be flowing out of the backwash port and through the hose. Let the water run for 30 to 60 seconds, or until the water runs clear. Check the clarity coming out of the end of your backwash hose or check your filter sight glass. Turn the filter syste