I don't know the exact one, but it's very similar to this: Hayward SP0410X502S Slide Backwash Valves for DE Filters on Sale at YourPoolHQ
So, the pin broke that holds the handle to the bottom half of the valve. This has happened before as I'm using cotter pins due to the fact that I've never been able to get the actual pin back in it. I bought a new one, but maybe it was the wrong size. Cotter pins are cheap and easy to replace. I was always able to pull the bottom half out with a large pair of needle nose pliers, but this time it won't come out. I'm pretty sure I'll break it it I keep pulling on it (possibly already have). I'm ok with replacing the valve stem at this point, but I just need to get it out oft here and I don't know what else to do other than take a large screwdriver and try breaking it apart, but my concern there is damaging bottom part or getting pieces down inside the value itself.
Any ideas on how to remove it?
If I can't get it out and have to replace the whole valve, how hard is that to do?