This case involves a pool filter that catastrophically malfunctioned, causing fatal injuries to an employee at a public swimming pool in Hawaii. On the date of the incident in question, the employee had been tasked with replacing a filter unit in the pool’s water filtration system. In order to begin the replacement process, the employee depressurized the filtration system and loosened a metal band that secured the filter cartridge while the system was in use. The employee then replaced the cartridge, tightened the band, and re-activated the system. He noticed that the cartridge was leaking under the pressure, and went to apply additional tension to the band. Suddenly, the top of the filter exploded, driving metal fragments into the employee’s face and skull. He was taken to the hospital, where he died shortly after arrival.