Anyone out there would be kind enough to tell me how to reset the guage.  I was out the other day and the hose that connects to the guage came off.  When it did the guage went all the way to the right (high pressure side) it still shows that it is getting water but won't show accurately how much.  My guess is that it got air in the line but I still have no answers on how to fix.  Thanks Travis

By replacing it.  Hate to put it that way but that's about the only way.  Something broke in the guage of it's sprung the coil that makes it move.  Water can get in them and freeze and will make them do that also.  Air in the line has nothing to do with it.