{"product_id":"o-305-aladdin-hayward-star-clear-filter-head-o-ring-cx250f","title":"O-305 | Aladdin Hayward Star-Clear Filter Head O-Ring | CX250F","description":"\u003cp data-start=\"68\" data-end=\"614\"\u003eThe Aladdin O-305 Hayward Star-Clear Filter Head O-Ring is a precision-fit replacement engineered to match the original Hayward CX250F seal used on Star-Clear cartridge filter systems. Molded from durable, chemical-resistant elastomer, it provides a tight, consistent seal between the filter head and tank body, preventing air leaks, water seepage, and pressure loss during filtration. Its exact sizing ensures smooth installation, helping maintain proper system pressure and efficient water clarity across residential and commercial pool setups.\u003c\/p\u003e\n\u003ch3 data-start=\"616\" data-end=\"630\"\u003eHighlights\u003c\/h3\u003e\n\u003cul data-start=\"631\" data-end=\"1313\"\u003e\n\u003cli data-start=\"631\" data-end=\"775\"\u003e\n\u003cp data-start=\"633\" data-end=\"775\"\u003e\u003cstrong data-start=\"633\" data-end=\"663\"\u003eDirect CX250F Replacement:\u003c\/strong\u003e Matches original Hayward Star-Clear dimensions for a secure, leak-free seal between the tank and filter head.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"776\" data-end=\"918\"\u003e\n\u003cp data-start=\"778\" data-end=\"918\"\u003e\u003cstrong data-start=\"778\" data-end=\"808\"\u003eMaintains Proper Pressure:\u003c\/strong\u003e Prevents air intrusion and water leaks that can reduce filtration efficiency or disrupt system performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"919\" data-end=\"1049\"\u003e\n\u003cp data-start=\"921\" data-end=\"1049\"\u003e\u003cstrong data-start=\"921\" data-end=\"954\"\u003eChlorine-Resistant Elastomer:\u003c\/strong\u003e Built to withstand pool chemicals, heat, and pressure cycles without hardening or deforming.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1050\" data-end=\"1179\"\u003e\n\u003cp data-start=\"1052\" data-end=\"1179\"\u003e\u003cstrong data-start=\"1052\" data-end=\"1078\"\u003eEasy Installation Fit:\u003c\/strong\u003e Seats cleanly into the tank groove for fast, consistent sealing during routine filter maintenance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1180\" data-end=\"1313\"\u003e\n\u003cp data-start=\"1182\" data-end=\"1313\"\u003e\u003cstrong data-start=\"1182\" data-end=\"1213\"\u003eSupports Filter Efficiency:\u003c\/strong\u003e Helps maintain stable pressure and cleaner circulation for improved clarity and system reliability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHayward Star-Clear Filters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"282\" data-end=\"301\"\u003eAdditional Info\u003c\/h3\u003e\n\u003cp data-start=\"302\" data-end=\"715\"\u003eThe Aladdin O-305 Hayward Star-Clear Filter Head O-Ring replaces the original CX250F seal used on Star-Clear cartridge filters. This FAQ helps walk-in customers at Discount Pool Mart confirm compatibility, understand installation steps, and troubleshoot pressure-loss issues before picking up the O-305 in store. These details support a watertight, airtight seal that helps maintain proper filtration performance.\u003c\/p\u003e\n\u003ch2 data-start=\"717\" data-end=\"745\"\u003eCompatibility and Fitment\u003c\/h2\u003e\n\u003cp data-start=\"746\" data-end=\"921\"\u003eMany walk-in customers bring older Star-Clear filters to Discount Pool Mart looking for the correct head gasket. This section helps confirm that the O-305 is the proper match.\u003c\/p\u003e\n\u003ch4 data-start=\"923\" data-end=\"990\"\u003eHow can I tell if the O-305 fits my Hayward Star-Clear filter?\u003c\/h4\u003e\n\u003cp data-start=\"991\" data-end=\"1211\"\u003eLook for the CX250F reference on your filter label or manual. If your filter uses this gasket between the tank body and head, the O-305 is the correct replacement. Bringing photos to the store helps staff verify quickly.\u003c\/p\u003e\n\u003ch4 data-start=\"1213\" data-end=\"1281\"\u003eDoes the O-305 work on both older and newer Star-Clear systems?\u003c\/h4\u003e\n\u003cp data-start=\"1282\" data-end=\"1416\"\u003eYes, Hayward kept the sealing dimensions consistent across Star-Clear generations. The O-305 seats properly in the same groove design.\u003c\/p\u003e\n\u003ch4 data-start=\"1418\" data-end=\"1491\"\u003eCan replacing the O-305 fix low pressure or air entering the filter?\u003c\/h4\u003e\n\u003cp data-start=\"1492\" data-end=\"1650\"\u003eOften yes. A worn head O-ring is a common cause of pressure loss, bubbles in the pump basket, or uneven flow. Installing the O-305 restores a dependable seal.\u003c\/p\u003e\n\u003ch2 data-start=\"1652\" data-end=\"1689\"\u003eInstallation and Troubleshooting\u003c\/h2\u003e\n\u003cp data-start=\"1690\" data-end=\"1805\"\u003eWalk-in customers often need quick guidance on how to seat the O-ring correctly and how to identify sealing issues.\u003c\/p\u003e\n\u003ch4 data-start=\"1807\" data-end=\"1858\"\u003eHow do I install the O-305 during maintenance?\u003c\/h4\u003e\n\u003cp data-start=\"1859\" data-end=\"2036\"\u003eClean the tank groove, lightly lubricate the O-ring, and seat it evenly before reinstalling the filter head. Tighten the clamp or bolts uniformly to create balanced compression.\u003c\/p\u003e\n\u003ch4 data-start=\"2038\" data-end=\"2096\"\u003eWhat symptoms indicate my old CX250F seal has failed?\u003c\/h4\u003e\n\u003cp data-start=\"2097\" data-end=\"2241\"\u003eMoisture around the tank seam, hissing under pressure, or unstable PSI readings suggest O-ring wear. Replacing it usually resolves these issues.\u003c\/p\u003e\n\u003ch4 data-start=\"2243\" data-end=\"2301\"\u003eHow can I confirm the new O-ring is sealing properly?\u003c\/h4\u003e\n\u003cp data-start=\"2302\" data-end=\"2432\"\u003eThe filter should hold steady pressure without leaks or air intrusion. Stable circulation and clear water indicate proper sealing.\u003c\/p\u003e\n\u003ch2 data-start=\"2434\" data-end=\"2473\"\u003eIn-Store Pickup and Local Guidance\u003c\/h2\u003e\n\u003cp data-start=\"2474\" data-end=\"2551\"\u003eThis section supports Discount Pool Mart customers preparing for their visit.\u003c\/p\u003e\n\u003ch4 data-start=\"2553\" data-end=\"2633\"\u003eIs the O-305 typically available for same-day pickup at Discount Pool Mart?\u003c\/h4\u003e\n\u003cp data-start=\"2634\" data-end=\"2736\"\u003eYes, Star-Clear systems are common, so this O-ring is regularly stocked. Calling ahead is recommended.\u003c\/p\u003e\n\u003ch4 data-start=\"2738\" data-end=\"2806\"\u003eShould I bring my old O-ring or filter photos for verification?\u003c\/h4\u003e\n\u003cp data-start=\"2807\" data-end=\"2910\"\u003eYes, bringing the old gasket or a clear photo helps staff confirm compatibility quickly and accurately.\u003c\/p\u003e\n\u003ch4 data-start=\"2912\" data-end=\"2979\"\u003eDo customers usually purchase additional items with the O-305?\u003c\/h4\u003e\n\u003cp data-start=\"2980\" data-end=\"3079\"\u003eYes, many pick up replacement cartridges, pressure gauges, or clamp hardware during filter service.\u003c\/p\u003e","brand":"Aladdin","offers":[{"title":"Default Title","offer_id":51010937749792,"sku":"O-305","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/3326\/9536\/files\/O-305AladdinHaywardStar-ClearFilterHeadO-RingCX250FDiscountPoolMart_2.jpg?v=1766078176","url":"https:\/\/discountpoolmart.com\/products\/o-305-aladdin-hayward-star-clear-filter-head-o-ring-cx250f","provider":"Discount Pool Mart","version":"1.0","type":"link"}