Do a Backwash or,
If the pool equipment is below the water level, set the valve on top of the Filter to WASTE or BACKWASH. Restore the valve to the FILTER position when you have finished.
If the pool equipment is above the water level, set the valve on top of the Filter to WASTE or BACKWASH and turn the filter pump on using the Pool App. Restore the valve to the FILTER position when you have finished.
There are optional products available from Pooled Energy which allow you to automatically add mains water to the pool or else, empty it, using the Pool App for control. You do not need to go to the pool equipment and adjust valves or use a hose to add water.
If you already have an automatic filling/emptying system in the pool it should work with the Pooled Energy system in most cases. Note that these systems typically dilute the chemicals in the pool at a faster rate than pools without them, which results in higher chemical consumption and associated costs.