We have a Hayward Regent DE pool filter, model S48A84A04 for a 26' above ground pool. Every time we put DE in the skimmer to coat the cartridge, it all goes right back into the pool. We bought a new cartridge, thinking that was the problem, but it's doing the same thing. We don't know what else to do. It doesn't seem to have any air leaks, but maybe we're missing something.
I've read stuff about a check valve, but I don't understand where that is on the filter, or if we even have one. The pool store's repair people weren't very helpful. We want to use our pool, but can't figure out how to get this filter working properly.
It seemed to work OK the first time we ran it this season, but we took it out to clean the cartridge (like we always did - this is our 4th year with the pool), and now it doesn't work anymore. All the DE just goes right into the pool and doesn't stick to the cartridge. Can anyone help, please!?!