{"product_id":"39-120","title":"Polaris Zodiac 3900 Chain Tensioner (39-120)","description":"\u003cp\u003ePolaris Zodiac Chain Tensioner [3900] is a replacement part for compatible Polaris and Zodiac pool cleaner systems. This component helps keep the drive chain properly positioned so the cleaner can maintain steady movement during normal operation. When small cleaner parts wear out, even minor fit or movement issues can reduce cleaning coverage, create leaks, or cause the cleaner to move less reliably.\u003c\/p\u003e\u003cp\u003eUse part number 39-120 to help match this item to the correct cleaner model, repair diagram, or existing component before ordering. a practical replacement when the existing tensioner is worn, loose, cracked, or no longer holding the chain correctly. It is especially helpful for pool owners and service professionals who want to repair the cleaner rather than replace the full unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDesigned for compatible Polaris\/Zodiac cleaner applications\u003c\/li\u003e\n\u003cli\u003eHelps restore proper fit, movement, or water-flow performance\u003c\/li\u003e\n\u003cli\u003eUseful for routine cleaner repair and maintenance work\u003c\/li\u003e\n\u003cli\u003ePart number 39-120 supports accurate identification\u003c\/li\u003e\n\u003cli\u003eGood option for extending the service life of the cleaner\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Polaris\/Zodiac","offers":[{"title":"Default Title","offer_id":48503052173467,"sku":"39-120","price":28.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1751\/9347\/files\/87-100-1817_XL.jpg?v=1778034011","url":"https:\/\/www.bathandspaparts.com\/products\/39-120","provider":"Bath and Spa Parts Online","version":"1.0","type":"link"}