General description 2 new 9-100-9002 pressure relief valves as replacements for Polaris 180, 280, and 380 automatic pool cleaners. These valves feature a quick disconnect design and are easy to install by simply unscrewing the old part and screwing in the new one. Technical specifications Model: 9-100-9002 Material: Robust and wear-resistant ABS plastic Usage These pressure relief valves are designed to ensure optimal performance of Polaris automatic pool cleaners by maintaining proper pressure levels.