You should backwash a swimming pool filtration system (sand or de) when the pool system needs it. You will be able to tell it is time by a number of factors..
- When the system doesn’t run as well as it had been, ie it is slower to push water through, the skimmer is not suctioning as well as it should be, the returns are slow, or the pump is getting air into the system
- When the pressure gauge is running 5-7psi above it’s normal operating level
- when the pool is turning cloudy, and just doesn’t seem to be filtering effectively
On our new construction projects, it is common to backwash weekly when there is a lot of dirt and debris flying around. Once the pool is installed and normal maintenance is performed, once every couple of weeks would be the norm. Of course your situation will vary depending on your environment, number of trees, amount of debris, use of the pool etc.
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