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Moderator Note - Moved from this thread: Polaris 280 stuck at the donut shop How do you reduce the water pressure?

I have a Polaris 280 - have had it for ten years, with very few issues. Lately it has begun "running over it's hose" causing the back flow valve to loop underneath, and then it just sits there.... I replaced the back flow vale and it is only mildly better (the BF valve no longer drags the bottom...