I've got a Hayward 75 DE filter - replaced a cartridge filter a year or two ago. Anyway - is it typical that this should happen?
It seems when I put new DE in that it gets up to max pressure quickly - sometimes a few times in a day I'm required to go out and bump it. Then after two or three times (after 8-12 hours of running it) it "settles in" and will then go a week or more without requiring a bump. Mid-summer when the water is really clear it might go 4 or 5 weeks requiring little to no bumping.
Why does it always seem to need bumped when I change it?