Compatible Models: G52 valves are compatible with Zodiac Polaris 180, 280, 380, 480 PRO, 3900 Sport, Vac-Sweep 380, Vac-Sweep 280, 280 TankTrax models.Version improved: compared to the previous valve, our Polaris G52 valve replacement kit has an upgraded shell material, crack-resistant polymer structure, is not easy to break. damage and doubles its lifespan.G53 Mechanism: Manufactured made of friction-resistant and stable POM material. The pompom has a very low coefficient of friction and good stability. geometric. It is particularly suitable for to the manufacture of gears and bearings. This material can withstand high water pressure.Function: The upgraded version will solve the problem when your pool cleaner is stuck in the pool. over an obstacle. Although your emergency valve is still open, water will no longer spray from the nozzle and will keep water out. outside.Contents: 1 G52 valve replacement kit