The System 3 sand filter is designed to remove more dirt and impurities, which will make your water feel fresher and look more inviting. With this filter Sta-Rite has made maintenance easier, too. Cleaning is as simple as applying a little wrist action to the control valve and walking away. And you won't have to do it very often! Through innovative engineering, the filter's dirt-handling capacity is maximized, which pays off in less maintenance. With the System 3 sand filter you can enjoy additional leisure time in your crystal, clear pool.