Unless your pool gets really dirty, you should not need to backwash it beyond your scheduled maintenance. Another theory recommends to backwash when the pressure gauge is about 8 to 10 psi (pound-force per square inch) over the starting level.

Can all pool filters be backwashed?

Whether you choose to clean your pool with a sand or DE filter, you can easily backwash it on your own. All pool filters follow the same general steps for backwashing, but there may be small variations depending on the model you own. The owner's manual should have detailed instructions for backwashing your filter.

Why does a pool need to be backwashed?

The build-up of unwanted particles often results in increased pressure to the filter reducing its efficiency – it can lead to damage. Backwashing a pool dislodges any contaminant and debris and pushes them out into a hose via the pool pump or the waste line.