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Helps restore booster pump performance when the original volute is cracked
This makes them ideal for:
supported by knowledgeable staff and reliable online fulfillment
The result is cleaner water pathways and more consistent spa performance
leaks typically appear between the pump housing and motor—often mistaken for housing cracks or gasket issues
Polaris Chain Tensioner Kit — Part # 39-120 Edit Helps restore booster pump performanceKey Benefits + Pool Cleaner Drive Fitment Genuine Polaris chain tensioner kit for the Polaris 3900 Sport pressure side pool cleaner Part number 39 120 helps customers match the correct replacement component Helps maintain proper chain tension inside the cleaner drive system Supports smoother cleaner movement when the original tensioner is worn or failed Helps prevent the cleaner chain from becoming loose, slipping, or misaligned Useful replacement
