{"product_id":"aqualtra-hot-tub-filter-cartridge-fc-2402-replacement-9-3-8-x-5-1-4-1-mpt-thread-2-pack-washable-nsf-grade-pleated-media","title":"AQUALTRA Hot Tub Filter Cartridge FC-2402 Replacement 9 3\/8\" x 5 1\/4\" 1½\" MPT Thread, 2-Pack — Washable NSF-Grade Pleated Media","description":"\u003cp\u003e\u003cstrong\u003eAQUALTRA FC-2402 is a washable, NSF-material spa filter cartridge designed to replace FC-2402\/303279-style filters and trap hair, leaves, sand, and sediment for clearer hot tub water.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eKeep your hot tub or small pool running efficiently with replacement cartridges built to the same size and thread specification as many OEM parts. These two-pack AQUALTRA filters measure 9 3\/8 inches long with a 5 1\/4 inch outer diameter and a 1½\" MPT threaded base, so they fit systems that accept FC-2402-style cartridges. Constructed from BPA-free materials certified to NSF\/ANSI standards, they balance durability with easy maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these cartridges improve water clarity?\u003c\/h3\u003e\n\n\u003cp\u003eThe cartridge media is engineered to hold more debris than basic filter fabrics, catching particles that degrade water quality. Regular exchange or cleaning helps the circulation system move water freely and reduces strain on the pump. These filters remove common contaminants without altering your sanitizer routine.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-capacity pleated media captures fine sediment, hair, and leaves.\u003c\/li\u003e\n  \u003cli\u003ePolypropylene core supports steady flow under pressure.\u003c\/li\u003e\n  \u003cli\u003eThreaded 1½\" base secures a tight fit to stop bypassing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these AQUALTRA cartridges compatible with my spa model?\u003c\/h3\u003e\n\n\u003cp\u003eThese cartridges are sized to match many popular replacement part numbers — outer diameter 5 1\/4\" and length 9 3\/8\" with a closed top and string handle and a 1½\" MPT threaded bottom. They are compatible with a range of Watkins and other OEM cross-references when physical dimensions and thread type are the same. Always compare dimensions and connection types before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits cartridges with dimensions 9 3\/8\" L x 5 1\/4\" OD and 1½\" MPT base.\u003c\/li\u003e\n  \u003cli\u003eWorks as a replacement for common part numbers used in Watkins systems.\u003c\/li\u003e\n  \u003cli\u003eNote: Manufacturer names are listed for compatibility guidance only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I maintain and clean these spa filters?\u003c\/h3\u003e\n\n\u003cp\u003eThe cartridge material is washable and built for multiple cleanings, preserving performance for many cycles when cared for properly. Rinse with a hose every two weeks under typical use, and soak periodically with a filter cleaner for deeper removal of oils and scale. Remove the filter before using strong chemicals or hot cleaning solutions to prevent corrosion of threaded fittings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRinse debris with a garden hose; avoid high-pressure washers close-up.\u003c\/li\u003e\n  \u003cli\u003eSoak in a non-bleach filter solution for heavy oils or scale build-up.\u003c\/li\u003e\n  \u003cli\u003eReinstall dry and inspect end caps and threads for wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and safety standards are used in these cartridges?\u003c\/h3\u003e\n\n\u003cp\u003eEach cartridge uses a PET-based pleated media with a sturdy polypropylene center core and chlorine-resistant end caps, all free from BPA. These components meet NSF\/ANSI criteria for pool and spa materials, giving you reassurance about material safety and chemical compatibility. The construction is selected to resist common spa chemicals and provide consistent filtration over repeated cleanings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBPA-free PET media for efficient particle capture.\u003c\/li\u003e\n  \u003cli\u003eChlorine-resistant end caps and polypropylene core for durability.\u003c\/li\u003e\n  \u003cli\u003eManufactured to meet recognized NSF\/ANSI material standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? If you own a hot tub, portable spa, or small swim spa that accepts 9 3\/8\" x 5 1\/4\" cartridges with a 1½\" MPT threaded base, and you want a reusable, NSF-material replacement that traps finer debris and is easy to clean, this two-pack from AQUALTRA is a practical choice. It suits homeowners and service technicians who prioritize consistent filtration, straightforward maintenance, and verified material safety. Always verify your hot tub's filter dimensions and thread type before ordering to ensure proper fit.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this cartridge fit my hot tub?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check that your current filter is 9 3\/8\" long, 5 1\/4\" OD with a 1½\" MPT threaded base; if so, it should fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I clean these filters?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Rinse every two weeks under normal use and soak in a filter cleaner monthly or as needed for oily buildup.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AQUALTRA","offers":[{"title":"Default Title","offer_id":56805068472660,"sku":"B0CGLPJLMX","price":74.18,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/aqualtra-front-packaging-two-pack.jpg?v=1786798687","url":"https:\/\/gardenluxe.co.uk\/products\/aqualtra-hot-tub-filter-cartridge-fc-2402-replacement-9-3-8-x-5-1-4-1-mpt-thread-2-pack-washable-nsf-grade-pleated-media","provider":"Gardenluxe Uk","version":"1.0","type":"link"}