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Amazon.com: LONGADS G52 Backup Valve Compatible with Polaris Pool Cleaner Parts, Compatible with Polaris 180,280,380,480,3900 Pool Cleaner Polaris Backup Valve, The Valve Body has Been Reinforced : Patio, Lawn & Garden
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Amazon.com: Upgraded G52 Polaris Backup Valve Replacement Compatible with Polaris 280 380 180 3900 Rebuild kit for Polaris Pool Cleaner Parts, Redesigned for Crack Resistant Casing, Polaris 280 Backup Valve : Patio, Lawn & Garden
Amazon.com: Polaris Genuine Parts G52 Backup Valve Replacement Kit for Automatic Pressure-Side Pool Cleaner VacSweep 280, 380, 180 : Patio, Lawn & Garden
Durable 9-100-9002 Pressure Relief Valve Replacement Kit,for the Polaris 180 280 380 Automatic Pool Cleaners - Walmart.com
Polaris G53 380/280/180 Back-Up Valve Mechanism - Pool Warehouse
Upgraded G52 Backup Valve Replace Kit For Polaris 180 280 380 Pool Cleaner - Walmart.com
Upgraded G52 Polaris Backup Valve Replacement For Polaris Pool Cleaner Parts Compatible With Polaris 280 380 180 3900 Rebuild - Pool Accessories - AliExpress
Polaris G52 Backup Valve Overview and How to Install - YouTube