{"product_id":"c-5345-unicel-rec-warehouse-s2-g2-spa-cartridge-45-sq-ft","title":"C-5345 | Unicel Rec Warehouse S2\/G2 Spa Cartridge | 45 Sq. Ft","description":"\u003cp\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eThe Unicel C‑5345 cartridge is a high-quality 45 sq ft replacement filter tailored for Rec Warehouse S2\/G2 spa systems, including Rainbow and Waterway models. Made with robust spun-bonded polyester media and featuring approximately 230 pleats, it enhances dirt-trapping efficiency and extends filter life. Measuring 5 5\/16″ in diameter and 10 1\/8″ in length, with open 2 1\/8″ inner-diameter end caps, it’s designed for direct interchangeability with OEM units. Engineered for straightforward drops-in and excellent flow characteristics, the C‑5345 keeps your spa crystal-clear with minimal maintenance required.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-end=\"166\" data-start=\"152\"\u003eHighlights\u003c\/h3\u003e\n\u003cul data-end=\"573\" data-start=\"168\"\u003e\n\u003cli data-end=\"247\" data-start=\"168\"\u003e\n\u003cp data-end=\"247\" data-start=\"170\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"42\" data-start=\"0\"\u003eOptimized 45 sq ft Filtration Capacity\u003c\/strong\u003e: Offers a substantial surface area with around 230 pleats, resulting in superior dirt-holding ability and longer operation between cleanings.\u003c\/span\u003e\u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"327\" data-start=\"248\"\u003e\n\u003cp data-end=\"327\" data-start=\"250\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"38\" data-start=\"0\"\u003eProfessional-Grade Polyester Media\u003c\/strong\u003e: Built with heavy-duty, chemical-resistant spun-bonded polyester for reliable, long-term use in spa environments.\u003c\/span\u003e\u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"407\" data-start=\"328\"\u003e\n\u003cp data-end=\"407\" data-start=\"330\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"35\" data-start=\"0\"\u003ePrecision Sizing for Direct Fit\u003c\/strong\u003e: Dimensions—5 5\/16″ diameter, 10 1\/8″ length, open 2 1\/8″ inner-diameter end caps—are engineered to mirror OEM designs for hassle-free replacement.\u003c\/span\u003e\u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"489\" data-start=\"408\"\u003e\n\u003cp data-end=\"489\" data-start=\"410\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"39\" data-start=\"0\"\u003eVersatile Cross-Brand Compatibility\u003c\/strong\u003e: Compatible with Rec Warehouse S2\/G2, Rainbow, and Waterway spa systems, delivering easy integration across multiple platforms.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"573\" data-start=\"490\"\u003e\n\u003cp data-end=\"573\" data-start=\"492\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"35\" data-start=\"0\"\u003eEfficient Hydraulic Performance\u003c\/strong\u003e: Thoughtfully engineered pleat structure promotes smooth water flow and effective filtration, helping maintain pump efficiency and water clarity.\u003c\/span\u003e\u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan data-testid=\"webpage-citation-pill\" class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eSpecification\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e 5-5\/16″\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong\u003eLength: \u003c\/strong\u003e10-1\/8\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong\u003eInner-Diameter:\u003c\/strong\u003e 2 -1\/8″\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"293\" data-end=\"314\"\u003eAdditional Info\u003c\/h3\u003e\n\u003cp data-start=\"315\" data-end=\"546\"\u003eNeed help with the Unicel C-5345 45 sq ft spa filter cartridge for Rec Warehouse S2\/G2, Rainbow, or Waterway systems? This section covers installation, compatibility, and troubleshooting, with advice on confirming details in store.\u003c\/p\u003e\n\u003ch2 data-start=\"548\" data-end=\"588\"\u003eInstalling the C-5345 Spa Cartridge\u003c\/h2\u003e\n\u003cp data-start=\"589\" data-end=\"740\"\u003eThis cartridge drops directly into compatible spa housings with 2 1\/8″ open ends. Proper seating ensures secure operation and clean, clear spa water.\u003c\/p\u003e\n\u003ch4 data-start=\"742\" data-end=\"813\"\u003eHow do I install the C-5345 into my Rec Warehouse S2 spa filter?\u003c\/h4\u003e\n\u003ch4 data-start=\"814\" data-end=\"878\"\u003eWhy doesn’t the new cartridge seat evenly in the housing?\u003c\/h4\u003e\n\u003ch4 data-start=\"879\" data-end=\"939\"\u003eCan I buy the Unicel C-5345 cartridge in store today?\u003c\/h4\u003e\n\u003ch4 data-start=\"940\" data-end=\"1022\"\u003eDo I need to clean the spa filter housing before installing this cartridge?\u003c\/h4\u003e\n\u003ch2 data-start=\"1024\" data-end=\"1069\"\u003eConfirming Compatibility With Spa Models\u003c\/h2\u003e\n\u003cp data-start=\"1070\" data-end=\"1210\"\u003eThe C-5345 matches Rec Warehouse S2\/G2, Rainbow, and Waterway systems. Verifying size and part number before purchase ensures correct fit.\u003c\/p\u003e\n\u003ch4 data-start=\"1212\" data-end=\"1281\"\u003eDoes the C-5345 replace OEM cartridges in Rainbow spa filters?\u003c\/h4\u003e\n\u003ch4 data-start=\"1282\" data-end=\"1356\"\u003eHow do I confirm in store that my spa uses this 45 sq ft cartridge?\u003c\/h4\u003e\n\u003ch4 data-start=\"1357\" data-end=\"1425\"\u003eCan store staff compare my old filter with the Unicel C-5345?\u003c\/h4\u003e\n\u003ch4 data-start=\"1426\" data-end=\"1485\"\u003eWill the C-5345 also fit Waterway spas sold locally?\u003c\/h4\u003e\n\u003ch2 data-start=\"1487\" data-end=\"1530\"\u003eTroubleshooting Filtration Performance\u003c\/h2\u003e\n\u003cp data-start=\"1531\" data-end=\"1676\"\u003eIf water stays cloudy or flow decreases, the filter may be clogged or incorrectly seated. Replacing with a fresh C-5345 restores water clarity.\u003c\/p\u003e\n\u003ch4 data-start=\"1678\" data-end=\"1749\"\u003eWhy is my spa still dirty after installing the C-5345 cartridge?\u003c\/h4\u003e\n\u003ch4 data-start=\"1750\" data-end=\"1814\"\u003eHow often should I rinse or replace this 45 sq ft filter?\u003c\/h4\u003e\n\u003ch4 data-start=\"1815\" data-end=\"1896\"\u003eWhat should I do if pressure rises quickly after adding the new cartridge?\u003c\/h4\u003e\n\u003ch4 data-start=\"1897\" data-end=\"1961\"\u003eCan I bring my old filter to the store to confirm sizing?\u003c\/h4\u003e","brand":"Unicel","offers":[{"title":"Default Title","offer_id":50661907824928,"sku":"C-5345","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/3326\/9536\/files\/C-5345UnicelRecWarehouseS2G2SpaCartridge45Sq.FtDiscountPoolMart.jpg?v=1758652649","url":"https:\/\/discountpoolmart.com\/products\/c-5345-unicel-rec-warehouse-s2-g2-spa-cartridge-45-sq-ft","provider":"Discount Pool Mart","version":"1.0","type":"link"}