{"product_id":"haywardfilterheadwclampsystemdex4820btchppdex4820btc","title":"Hayward Filter Head w\/ Clamp System | DEX4820BTC","description":"\u003cdiv class=\"product-description\"\u003e\n\n  \u003ch2\u003eHayward DEX4820BTC Filter Head with Clamp System (Upper Tank Body) for Pro-Grid DE4820 \u0026amp; SwimClear C4020\/C4025\/C4030\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Hayward \u003cstrong\u003eDEX4820BTC\u003c\/strong\u003e is a complete OEM \u003cstrong\u003eupper filter body (filter head) with clamp system\u003c\/strong\u003e used on\n    select Hayward \u003cstrong\u003ePro-Grid\u003c\/strong\u003e vertical grid D.E. filters and \u003cstrong\u003eSwimClear\u003c\/strong\u003e cartridge filters. It replaces the\n    entire top half assembly when the original head is cracked, warped, leaking at the clamp seam, or no longer seals reliably.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eFits \/ Compatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eHayward \u003cstrong\u003ePro-Grid\u003c\/strong\u003e vertical grid D.E. filter: \u003cstrong\u003eDE4820\u003c\/strong\u003e (48 sq ft)\u003c\/li\u003e\n    \u003cli\u003eHayward \u003cstrong\u003eSwimClear\u003c\/strong\u003e cartridge filters: \u003cstrong\u003eC4020\u003c\/strong\u003e, \u003cstrong\u003eC4025\u003c\/strong\u003e, \u003cstrong\u003eC4030\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eUpper filter body \/ filter head (top half)\u003c\/li\u003e\n    \u003cli\u003eHeavy-duty \u003cstrong\u003eclamp ring\u003c\/strong\u003e and tightening hardware\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMetal-reinforced tank seal (O-ring)\u003c\/strong\u003e for the clamp seam (commonly included with this assembly)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\n    \u003cstrong\u003eNote:\u003c\/strong\u003e Some listings note that certain accessories (such as the manual air relief assembly) may not be included. If your\n    air relief or gauge assembly is damaged, plan to replace it separately.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCommon Reasons to Replace\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCracks or hairline fractures in the filter head\u003c\/li\u003e\n    \u003cli\u003ePersistent leaking at the clamp seam after seal replacement\/cleaning\u003c\/li\u003e\n    \u003cli\u003eWarped sealing surface that won’t clamp evenly\u003c\/li\u003e\n    \u003cli\u003eDamaged clamp ring\/hardware causing uneven tension\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSpecs (Quick Reference)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003ePart Number: \u003cstrong\u003eDEX4820BTC\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePart Type: \u003cstrong\u003eFilter Parts\u003c\/strong\u003e (Filter Head w\/ Clamp System)\u003c\/li\u003e\n    \u003cli\u003ePool Type: \u003cstrong\u003eIn-Ground\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGTIN\/UPC: \u003cstrong\u003e610377106887\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eReplacement Part Warranty: \u003cstrong\u003e6 months (parts only)\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eApprox. Shipping Weight: \u003cstrong\u003e26.4 lb\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eApprox. Shipping Dimensions: \u003cstrong\u003e16.5\" x 22.4\" x 24.3\"\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTurn off the pump\u003c\/strong\u003e and fully relieve filter pressure at the air relief before loosening the clamp.\u003c\/li\u003e\n    \u003cli\u003eClean the tank flange and sealing surfaces thoroughly—grit is a common cause of clamp seam leaks.\u003c\/li\u003e\n    \u003cli\u003eSeat the seal evenly and tighten the clamp uniformly per the filter’s instructions.\u003c\/li\u003e\n    \u003cli\u003eAfter restart, bleed air until a steady stream of water flows, then inspect the clamp seam for seepage.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=DEX4820BTC\"\u003eHayward DEX4820BTC (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=DE4820%20parts\"\u003eHayward Pro-Grid DE4820 Parts (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=C4020%20parts\"\u003eHayward SwimClear C4020 Parts (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=C4025%20parts\"\u003eHayward SwimClear C4025 Parts (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=C4030%20parts\"\u003eHayward SwimClear C4030 Parts (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=filter%20tank%20o-ring%20metal%20reinforced\"\u003eMetal-Reinforced Filter Tank Seals (search)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=silicone%20pool%20lube\"\u003eSilicone O-Ring \u0026amp; Gasket Lubricant (search)\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr\u003e\n\n  \u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eNever loosen the clamp while the filter is under pressure—always shut off the pump and bleed air first.\u003c\/li\u003e\n    \u003cli\u003eLightly lubricate the tank seal with silicone-based pool lubricant to reduce pinching and improve sealing.\u003c\/li\u003e\n    \u003cli\u003eKeep the clamp band clean and inspect it for cracks or stretching during seasonal service.\u003c\/li\u003e\n    \u003cli\u003eIf seam leaks persist after reseating, inspect both tank flanges for warping or damage rather than overtightening the clamp.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":46797878689967,"sku":"DEX4820BTC","price":669.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6415\/2239\/files\/hayward-filter-head-w-clamp-system-dex4820btc-pool-filter-parts-9242168.jpg?v=1777068629","url":"https:\/\/freshized.com\/products\/haywardfilterheadwclampsystemdex4820btchppdex4820btc","provider":"Freshized","version":"1.0","type":"link"}