52 Spare Valve Replacement for Polaris Cleaner Parts Spare valves for Zodiac Polaris models 180, 380, 280, 480 PRO, 3900 Sport, Vac-Sweep 380, Vac-Sweep 280, 280TankTrax, Pentair E10. NEW UPGRADE: Compared with the previous spare valve, we have upgraded the housing material, made of crack-resistant polymer copolymer blend, which is more wear-resistant and less prone to damage than the previous product, and doubles its lifespan. G53 Gear MechanismMade of friction-resistant and stable POM material, Pom has a very low coefficient of friction and good geometric stability, especially suitable for making gears and bearings, and this material is more able to withstand high water pressure operation. FunctionThe upgraded version will solve the problem when your pool cleaner gets stuck on an obstacle, although your backup valve remains open, the nozzle no longer sprays water and keeps the water out. Included in the package1 pcs G52 spare valve replacement kit includes G53 gear mechanism. COMPATIBILITY: The G52 Replacement Valve fits Zodiac Polaris pool cleaners 180, 380, 280, 480 PRO, 3900 Sport, Vac-Sweep 380, Vac-Sweep 280, 280 TankTrax. NEW UPGRADE: Compared to the previous backup valve, we have upgraded the housing material with a blend of crack-resistant polymers that are more abrasion-resistant, less prone to damage, and last twice as long as the previous product. Fix the problem: When the pool cleaner gets stuck on an obstacle or edge and is difficult to turn around, or when water no longer comes out of the nozzle even though the back-up valve is still open, it's time to think about checking or replacing it, and we've upgraded the progeny to prevent this from occurring and avoiding pooling of water. G53 Gear Mechanism: Made of wear-resistant, stable POM material, it can work continuously under ultra-high water pressure, but if there is too much sand, the gears can get stuck. In this case, you need to remove the wheel to clean the sand before you can continue working. Don't forget: the buyer's feedback that continuous water spraying causes the Polaris to float is because the local water pressure exceeds the adapted water pressure too much, and we have improved it.