Circulate: This function circulates pool water bypassing the sand filter. Use this function if the filter is broken to collect debris in the debris screens. IMPORTANT: cover the hole on the top of the hub to avoid the sand going inside, and add the sand gently to avoid damaging the debris screen at the bottom of the tank.

Third step: disconnect the hoses that connect the sand filter to the pool. This will make it easier to remove the sand. Fourth step: open the drain valve on the bottom of the sand filter to drain all residual water into the sand filter body. To speed up the operation, position the control valve between two functions. IMPORTANT: when performing this operation, please be sure that the O-ring is in the correct position and completely clean from the sand. Seventh step: fill the bottom part with the new sand until it reaches the mark between low and high marked on the hub.Fifth step: open the metal ring in the middle of the tank body and open the upper part of the tank. Sixth step: take out all old sand from the tank and rinse the bottom part with a garden hose to be sure it is clean. They are easy to clean and sift dirt and debris out of your pool with your pump, which is great if you have a busy schedule and important for the upkeep of healthy pool water. Filter: This function is used to filter pool water and should be positioned here 99% of the time. Water is pumped through the sand filter, where it is cleaned and returned to the pool.