The pumps are extremely reliable and hard-wearing. Based on historical averages, approximately 12,500 to 14,000 operating hours from the urethane lined pump is achieved. **NOTE**Those figures assume the use of a larger aggressive aluminium oxide. Using gentler blast media, such as glass bead abrasive, achieves even longer life. Glass bead is significantly softer and gentler. They are commercial machines designed to work long hours and we also keep a range of parts on hand.