General description This Upgraded Polaris G52 Relief Valve Replacement Kit is designed for use with Zodiac Polaris pool cleaners, including models 180, 280, 380, 480 PRO, and 3900 Sport. This premium quality valve helps the cleaner return to corners or edges of the pool when it gets stuck on obstacles, enhancing the cleaning efficiency of your pool robot. Technical specifications Material: Upgraded G54 crack-resistant polymer blend Includes reinforced G53 gear Service life: Doubled compared to previous models Compatibility: Zodiac Polaris 180, 280, 380, 480 PRO, 3900 Sport, Vac-Sweep 380, Vac-Sweep 280, 280TankTrax Usage No assembly required; ready to install Connect fittings and hoses firmly for operation Operates by opening every 3 minutes for 30 seconds to change the cleaning direction Can pull the unit out of tight spots if it gets stuck Suitable for saltwater pools