Pretty sure o-ring failed in the little valve where the pedal swivels. Or a valve itself- looks totally non-rebuildable though. I am taking it apart tonight- can't hurt anyway- can only break it once- right? But I would like to know if there is a similar foot pedal that allows air to escape and air to inter in the same manner if that makes sense?What do you mean by "blew out"? Did a hose degrade a fail? There can't be much to it. Maybe an o-ring failed?