[Motor31]

It sounds like there is a kink in the line there somewhere. You'll need to trace the pull cable and see where it is binding up. If the rod got bent at all, you'll need to replace the cable assembly. It doesn't straighten out well at all. Be careful on using it as that one is harder to replace the valve on than the black tank. I had to replace the black tank valve and didn't bother with the cable style, I just use a regular valve and reach into the basement area to pull it. MUCH easier than the cable style DRV likes so much.