Filter balls issue

We have an overground pool and use filter balls. Last year worked well.

This year after setting the pump up again the filter balls are being pushed through to the pool. Any ideas on what could the issue be?

Thanks for your help


Not familiar with your setup but at a guess a lateral or two have failed and allowing passage of poly balls.
Strip open filter and take a look.

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Sorry for my ignorance - could you clarify what a lateral is. Thanks so much for your help


Hi Joyce, they are little parts in the bottom of the filter.

Lovely thanks

It’s somewhere to start at least, also a common failure point.