I suspect that the answer to this one is to buy a new one, but I thought I'd try.
It has periodically slowed down to a crawl when refilling the tank, and at best, by turning the feed valve on and off, I have gotten whatever seems to be plugging it up to clear. That's happened a couple of times, but now I can't get it unplugged.
I can't find any specifics on the mechanism, just installation instructions. Is there a way to disassemble the valve and fix the problem, or isn't it worthwhile?