So I had noticed that our air valve on our recently installed C450 had no resistance, so I checked and sure enough, the slide valve had come off the handle, so I adjusted it and tested it a couple times and it worked fine. Fast forward two days later, the handle snapped off, very little resistance at all, but broke clean off. I attempted to remove the bolt securing it, however it's not coming loose at all. What are my options here for replacement or fixing it?