I have a Hayward EC65 DE filter that returns dirty water to pool for first 5 minutes or so of startup. I have also noticed there is not much resistance on the bump handle during regeneration compared to what it used to be.
My guess is the gasket on the manifold is not sealing or tubes have tears in them. The return eventually clears up but still will turn clear pool green in minutes after turning on pump.
Anyone have a guess to what exactly I need to replace or look for? The tubes have no visible tears and the gasket gets lubed with silicone when reassembling.