Zodiac Polaris 180/280/380 Pool Cleaner Back Up Valve Collars Collar | G57 Test Strips Note from Unicel: This cartridge

Note from Unicel: This cartridge typically features a blue top end cap and orange bottom end cap

Rather than relying on external fiber optics

it maximizes surface area and service life — delivering cleaner water between cleanings and longer intervals before replacement

It is ideal for initial pool fill at start-up

Precision-manufactured with high-grade DE filter fabric and reinforced construction

Zodiac Polaris 180/280/380 Pool Cleaner Back Up Valve Collars Collar | G57 Test Strips Note from Unicel: This cartridgeThe Zodiac G57 (also known as Polaris G57) is a back up valve collar designed for pressure side automatic pool cleaners. It is a critical replacement component used to secure the back up valve assembly and protect its internal mechanisms. Compatibility: This part is primarily designed for Polaris pressure side cleaners, which are part of the Zodiac family. Compatible models include: Polaris 180, 280, and 380 Vac Sweep Polaris 280 TankTrax Polaris 3900