{"product_id":"darlly-81003-replacement-spa-pool-filter-cartridge-uhd-sr100-for-starite-pentair-bottom","title":"Darlly 81003 Replacement Spa Pool Filter Cartridge UHD SR100 For StaRite Pentair Bottom","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Darlly Spa\/Pool Replacement Filter Cartridge [81003] (UHD-SR100) — a purpose-built cartridge designed to keep spa and pool water sparkling clean with dependable, easy filtration. Engineered to slot into StaRite\/Pentair systems and to replace a broad range of older filter cores, this cartridge delivers consistent performance season after season.\u003c\/p\u003e \u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e 4 oz filtration media for solid debris and fine particulates\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFiltration area:\u003c\/strong\u003e 102 square feet of surface media coverage for efficient flow and dirt holding capacity\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTop style:\u003c\/strong\u003e Open\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBottom style:\u003c\/strong\u003e Open with Slots for enhanced debris capture\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePhysical dimensions:\u003c\/strong\u003e Diameter 8-11\/16\", Length 25-11\/16\"\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTop footprint:\u003c\/strong\u003e 4-3\/16\"\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Compatible with StaRite\/Pentair pools and spas, model family including UHD-SR100\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReplaces:\u003c\/strong\u003e 177009, 20201ECO, 46171, 645544025500, AK-8020, FC-2550, PLE-051-9183, PLE-051-9601, PSR100, PSR100-4, UHD-SR100, WC108-58S2X\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eModel lineage:\u003c\/strong\u003e Posi-Flo TX\/TXR\/PTM 100 family compatibility\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy this cartridge stands out\u003c\/h2\u003e\n\u003cp\u003eWhat sets the 81003 cartridge apart is its combination of robust filtration media and a design optimized for heavy-use spa and pool systems. The open-top design simplifies installation and inspection, while the open-with-slots bottom maximizes debris capture near the intake, helping prevent clogging and maintaining steady circulation. The 102 sq ft media area delivers a higher dirt-holding capacity than many standard cartridges, translating to longer intervals between cleanings and clearer water.\u003c\/p\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eResidential hot tubs and spas that require reliable, consistent filtration with minimal disruption.\u003c\/li\u003e \u003cli\u003eIn-ground and above-ground pool systems using StaRite\/Pentair filtration cores that need a trusted replacement cartridge with broad compatibility.\u003c\/li\u003e \u003cli\u003eSeasonal pool setups where easy maintenance and long service life are priorities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eMaintenance and care\u003c\/h2\u003e\n\u003cp\u003eTo maximize life and performance, follow these practical steps:\u003c\/p\u003e\n\u003col\u003e \u003cli\u003ePower down the pump before removing or installing cartridges.\u003c\/li\u003e \u003cli\u003eRinse the cartridge with a garden hose from the interior out to clear loose debris; avoid high-pressure jets that could damage the media.\u003c\/li\u003e \u003cli\u003eInspect for cracks or deformation—replace if the cartridge shows wear.\u003c\/li\u003e \u003cli\u003ePeriodically deep-clean with a cartridge cleaner according to the cleaner’s instructions, then rinse thoroughly and let air-dry before reinstalling.\u003c\/li\u003e \u003cli\u003eFrequency of cleaning depends on use: more frequent in heavy-use periods or high-contaminant environments.\u003c\/li\u003e\n\u003c\/ol\u003e \u003ch2\u003eInstallation tips\u003c\/h2\u003e\n\u003cp\u003eFor a smooth swap to the UHD-SR100 cartridge:\u003c\/p\u003e\n\u003col\u003e \u003cli\u003ePower off the filtration system and remove the existing cartridge.\u003c\/li\u003e \u003cli\u003eCheck that the replacement’s dimensions align with your housing — diameter, length, and top\/bottom configurations match your unit’s specs.\u003c\/li\u003e \u003cli\u003eInsert with the open top facing up and the bottom core seated securely; ensure any end caps or clamps are fastened according to your pump housing design.\u003c\/li\u003e \u003cli\u003eRun the system and check for leaks; recheck the cartridge after initial run time to ensure proper seating.\u003c\/li\u003e\n\u003c\/ol\u003e \u003cp\u003eUpgrade your spa or pool filtration with the Darlly 81003 UHD-SR100 cartridge for reliable performance, broad compatibility, and a filtration solution that helps keep water clear with less maintenance.\u003c\/p\u003e \u003cbr\u003e \u003ctable class=\"margintop4\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl0_labelAttributeName\"\u003eApplication\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl0_labelAttributeValue\"\u003eStaRite\/Pentair\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl1_labelAttributeName\"\u003eBottom Physical Dimension\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl1_labelAttributeValue\"\u003e6\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl2_labelAttributeName\"\u003eBottom Style\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl2_labelAttributeValue\"\u003eOpen w\/Slots\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl3_labelAttributeName\"\u003eDiameter\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl3_labelAttributeValue\"\u003e8-11\/16\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl4_labelAttributeName\"\u003eLength\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl4_labelAttributeValue\"\u003e25-11\/16\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl5_labelAttributeName\"\u003eMedia Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl5_labelAttributeValue\"\u003e4oz\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl6_labelAttributeName\"\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl6_labelAttributeValue\"\u003ePosi-Flo TX\/TXR\/PTM 100\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl7_labelAttributeName\"\u003eSquare Footage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl7_labelAttributeValue\"\u003e102 sq ft\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl8_labelAttributeName\"\u003eTop Physical Dimension\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl8_labelAttributeValue\"\u003e4-3\/16\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl9_labelAttributeName\"\u003eTop Style\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl9_labelAttributeValue\"\u003eOpen\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Darlly","offers":[{"title":"Default Title","offer_id":41748466434090,"sku":"81003","price":75.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/4014\/1354\/files\/81003.jpg?v=1769976164","url":"https:\/\/bathparts.com\/products\/darlly-81003-replacement-spa-pool-filter-cartridge-uhd-sr100-for-starite-pentair-bottom","provider":"Bath \u0026 Spa Superstore","version":"1.0","type":"link"}