Cleanup after a heavy rain and mud gets into your swimming pool. Vacuuming out in backwash mode? Yes, it can be done So Long as you remove the grids first. Take out the grids and clean them but before you put them back into the filter just put it back together and vacuum in backwash mode to a safe place that can handle the heavy water load about to come out. Before you do make sure to leave the pump off for at least a week so all the dust can settle to the bottom. #swimmingpool #diypool #pool #diy #poolfilter