{"product_id":"maytronics-9991425-r4-ultra-fine-cartridge-filter-large","title":"Maytronics 9991425-R4 Ultra Fine Cartridge Filter - Large","description":"\u003cp\u003e\u003cstrong\u003eWhat This Part Is Used For\u003c\/strong\u003e\u003cbr\u003e This large ultra fine cartridge filter installs inside compatible Maytronics robotic pool cleaners. It captures fine debris such as silt, dust, and small suspended particles during cleaning cycles. The cartridge is removable for rinsing and routine maintenance. \u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhy This Part Matters\u003c\/strong\u003e\u003cbr\u003e Fine particulate can pass through standard filtration if media is worn or clogged. Reduced filtration efficiency impacts water clarity and cleaning performance. Replacing the ultra fine cartridge restores proper internal debris capture. Routine filter maintenance supports consistent suction and coverage. \u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey Features and Specifications\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eManufacturer part number: 9991425-R4\u003c\/li\u003e \u003cli\u003eUltra fine cartridge filter\u003c\/li\u003e \u003cli\u003eSize: Large\u003c\/li\u003e \u003cli\u003eDesigned for compatible Maytronics robotic cleaners\u003c\/li\u003e \u003cli\u003eRemovable and cleanable filter configuration\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eInstallation and Fitment Guidance\u003c\/strong\u003e\u003cbr\u003e Remove the cleaner from the pool and disconnect power before accessing the filter compartment. Ensure proper seating within the filter housing before operation. Confirm by manufacturer part number before ordering. \u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eAbout the Maytronics Brand\u003c\/strong\u003e\u003cbr\u003e Maytronics designs robotic cleaners with adaptable internal filtration systems to match debris conditions. Ultra fine options are used when pools experience heavy dust or sediment. Their modular design allows quick filter changes in the field. The brand supports long term robotic maintenance with accessible replacement parts. \u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eCommon Service Context\u003c\/strong\u003e\u003cbr\u003e Technicians install ultra fine cartridges during spring startup or after construction activity. It is common in environments with recurring fine debris issues. Routine inspection often reveals clogged filter media requiring replacement. \u003c\/p\u003e","brand":"Maytronics US","offers":[{"title":"Default Title","offer_id":52029788553490,"sku":"9991425-R4","price":56.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/MAY9991425R4_0.jpg?v=1770930603","url":"https:\/\/www.aquaterrabackyard.com\/products\/maytronics-9991425-r4-ultra-fine-cartridge-filter-large","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}