{"product_id":"carbon-block-cto-filter-10-inch","title":"10\" x 2.5\" Carbon Block CTO Filter for RO Systems","description":"\u003ch2\u003e10\" x 2.5\" Carbon Block CTO Filter for RO Systems\u003c\/h2\u003e\u003cp\u003eThis 10\" x 2.5\" carbon block (CTO) filter is a standard pre-filter stage in most under-sink reverse osmosis systems. Carbon block filters are commonly used to help reduce chlorine taste and odor before water reaches the RO membrane.\u003c\/p\u003e\u003ch3\u003eBest for:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eExisting RO system owners replacing Stage 2 or Stage 3 carbon filters\u003c\/li\u003e\n\u003cli\u003eAnyone on a 6-month filter maintenance schedule\u003c\/li\u003e\n\u003cli\u003eHomeowners who notice chlorine taste or odor in their tap water\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey benefits:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCarbon block construction provides consistent contact time with water\u003c\/li\u003e\n\u003cli\u003eCommonly used to help reduce chlorine taste and odor in drinking water\u003c\/li\u003e\n\u003cli\u003eHelps protect the RO membrane from chlorine-related degradation over time\u003c\/li\u003e\n\u003cli\u003eStandard 10\" x 2.5\" size fits most major RO filter housings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility:\u003c\/h3\u003e\u003cp\u003eFits standard 10\" x 2.5\" filter housings used in most 5-stage under-sink RO systems. Compatible brands typically include APEC, iSpring, Express Water, Home Master, and Watts. Always verify your housing size before ordering.\u003c\/p\u003e\u003ch3\u003eWhat’s included:\u003c\/h3\u003e\u003cp\u003e1 x 10\" x 2.5\" carbon block CTO filter cartridge\u003c\/p\u003e\u003ch3\u003eReplacement schedule:\u003c\/h3\u003e\u003cp\u003eGeneral guidance — every 6 months, or as recommended by your system manufacturer.\u003c\/p\u003e\u003ch3\u003eInstallation notes:\u003c\/h3\u003e\u003cp\u003eDIY-friendly. Turn off the water supply and depressurize the system before replacing.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cem\u003eIf you are responding to a local utility notice or boil-water advisory, follow your local utility or health department’s official instructions first.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cem\u003eCertification and contaminant reduction claims depend on manufacturer documentation for the specific product. Chloramine reduction claims require specific manufacturer test data — verify before purchase.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions:\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDoes this filter reduce chloramines?\u003c\/strong\u003e\u003cbr\u003eCarbon block filters are commonly used for chlorine reduction. Chloramine reduction depends on the specific product — verify with manufacturer documentation before purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does CTO stand for?\u003c\/strong\u003e\u003cbr\u003eChlorine, Taste, and Odor — the primary purpose of this filter stage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is carbon block different from granular carbon?\u003c\/strong\u003e\u003cbr\u003eCarbon block filters have a denser structure that provides more contact time with water. Performance varies by product and application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow often should I replace this filter?\u003c\/strong\u003e\u003cbr\u003eEvery 6 months is general guidance. Replace sooner if you notice taste or odor changes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this have NSF certification?\u003c\/strong\u003e\u003cbr\u003eCertification depends on the specific manufacturer documentation. Verify before purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat if I received a water notice?\u003c\/strong\u003e\u003cbr\u003eFollow your utility or health department’s official instructions first.\u003c\/p\u003e","brand":"ROFilterShop","offers":[{"title":"Default Title","offer_id":46087566753978,"sku":"RO-CARBON-BLOCK-CTO-10IN","price":12.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/7488\/3002\/files\/image_6c867f80-e38d-4fbc-b59a-ddfe6aa8b1c4.png?v=1783122809","url":"https:\/\/rofiltershop.com\/products\/carbon-block-cto-filter-10-inch","provider":"rofiltershop.com","version":"1.0","type":"link"}