Armstrong Pump is pleased to offer fiberscope inspections on all liquid ring vacuum pumps. A fiberscope inspection by a trained technician can be an invaluable tool in helping your vacuum pumps operate properly. A fiberscope inspection can not only estimate the capability of a vacuum pump, but also allow the technician to visually observe the inside of your vacuum pump. Many things can contribute to vacuum pump failures – wear, chemical attach, metallic contact, etc.