{"product_id":"75-gpd-ro-membrane-replacement","title":"75 GPD RO Membrane — Standard 1812 Size Replacement","description":"\u003ch2\u003e75 GPD RO Membrane — Standard 1812 Size Replacement\u003c\/h2\u003e\u003cp\u003eThe RO membrane is the core filtration stage in a reverse osmosis system. This 75 GPD thin-film composite (TFC) membrane is a standard replacement for most household under-sink RO systems using a 1812-format membrane housing.\u003c\/p\u003e\u003ch3\u003eBest for:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eExisting RO system owners replacing a worn or aging membrane\u003c\/li\u003e\n\u003cli\u003eAnyone whose TDS output readings have been rising despite recent filter changes\u003c\/li\u003e\n\u003cli\u003eHomeowners on a 2–3 year membrane replacement schedule\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey benefits:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eStandard 1812 format (11\" x 1.8\") fits most major under-sink RO brands\u003c\/li\u003e\n\u003cli\u003eThin-film composite (TFC) construction\u003c\/li\u003e\n\u003cli\u003e75 gallons per day (GPD) output under standard test conditions\u003c\/li\u003e\n\u003cli\u003eReplacing the membrane on schedule helps maintain system output and water quality\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility:\u003c\/h3\u003e\u003cp\u003eFits most standard 5-stage under-sink RO systems using an 11\" x 1.8\" membrane housing (1812 format). Compatible brands typically include APEC, iSpring, Express Water, Home Master, and Watts. Always verify your system’s membrane housing size and GPD rating before ordering.\u003c\/p\u003e\u003ch3\u003eWhat’s included:\u003c\/h3\u003e\u003cp\u003e1 x 75 GPD TFC RO membrane\u003c\/p\u003e\u003ch3\u003eReplacement schedule:\u003c\/h3\u003e\u003cp\u003eGeneral guidance — every 2–3 years, or when TDS output readings rise noticeably. Use a TDS meter to monitor performance over time.\u003c\/p\u003e\u003ch3\u003eInstallation notes:\u003c\/h3\u003e\u003cp\u003eDIY-friendly. Requires depressurizing the system and draining the storage tank before replacement. Most experienced DIYers complete this in 15–30 minutes.\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.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions:\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my membrane needs replacing?\u003c\/strong\u003e\u003cbr\u003eRising TDS readings in your RO output water are the most common indicator.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does 75 GPD mean?\u003c\/strong\u003e\u003cbr\u003eGallons per day — the rate at which the membrane produces filtered water under standard test conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this compatible with my system?\u003c\/strong\u003e\u003cbr\u003eCheck your system’s membrane housing size (1812 format, 11\" x 1.8\") before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a TDS meter to test my membrane?\u003c\/strong\u003e\u003cbr\u003eNot required, but recommended. We carry TDS meters in our store.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this membrane 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":46087525073082,"sku":"RO-MEMBRANE-75GPD","price":24.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/7488\/3002\/files\/image.png?v=1783122287","url":"https:\/\/rofiltershop.com\/products\/75-gpd-ro-membrane-replacement","provider":"rofiltershop.com","version":"1.0","type":"link"}