How Do You Backflush A Pool Filter?
Swimming pool filters remove dirt and debris from the water. The most common type of filter uses #20 silica sand as the filtering media. Grains of sand have jagged edges that snag particles as they flow by. Spaces between each grain begin to fill up with trapped debris, reducing the available paths for water to flow. This reduction in paths produces an increase in pressure inside the canister holding the sand. When the pressure gauge on the canister increases by 8-10 lbs. of pressure over the beginning pressure, it is time to backflush the filter and remove the debris. Turn off the pump. Depress the handle of your multi-port valve by applying firm pressure until it turns freely without scraping. Turn the handle until it is in the backflush or backwash position, and release the tension on the handle. Check your backflush hose connection to make sure that the hose clamp is secure. A loose clamp will not stand the force of the wastewater exiting the pool and can cause flooding if it pops
