It's not neccesary that your gear is damaged. It's well possible that the water only hit the outside of the gear. I don't think you geet compensated without knowing what's wrong with your gear.
So check the gear if you can find anything that's wrong. If so, let it check at a service centre. With that info you can think about the nexts steps... But I don't think you can ever claim more than the cost of any repair would cost.
Please remember that most of us are here in Europe and that our law system isworking very differently than yours