{"product_id":"freshpoint-reverse-osmosis-system","title":"Reverse Osmosis System - Pentair FreshPoint 4-Stage (GRO-475B)","description":"\u003ch2\u003eReverse Osmosis System - NSF-Certified Under-Sink Drinking Water\u003c\/h2\u003e\n\n\u003cp\u003eThe Pentair FreshPoint GRO-475B is a 4-stage under-sink \u003cstrong\u003ereverse osmosis system\u003c\/strong\u003e certified to \u003cstrong\u003eNSF\/ANSI Standards 42, 53, and 58 plus CSA B483.1 by NSF International\u003c\/strong\u003e, as a complete system. The certified reduction claims cover \u003cstrong\u003epentavalent arsenic, lead, fluoride, chromium (hexavalent and trivalent), atrazine, lindane, cysts, barium, cadmium, copper, radium 226\/228, selenium, and chlorine taste and odor\u003c\/strong\u003e, with \u003cstrong\u003e96.30% TDS rejection\u003c\/strong\u003e. Those numbers are third-party verified, not marketing claims.\u003c\/p\u003e\n\n\u003cp\u003eThe 4-stage train runs water through an FDF1-RC sediment and carbon pre-filter, a 75 GPD GRO75-RC reverse osmosis membrane (21.08 gpd certified production rate at standard test conditions), an F1B1-RC carbon block, and an F1GC-RC GAC polishing post-filter, then stores it in the 4.4 gallon tank so it is ready at the included lead-free air gap faucet.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt for Verified Performance\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNSF\/ANSI 42 + 53 + 58 Certified\u003c\/strong\u003e - the complete system, certified by NSF International. Many budget RO systems certify a single component or nothing at all.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 Stages, 75 GPD Membrane\u003c\/strong\u003e - 41.05% recovery rating and 96.30% TDS rejection, with a 4.4 gallon storage tank so water is waiting at the faucet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Gap Faucet Included\u003c\/strong\u003e - everything needed at the sink comes in the box, with 3\/8\" quick-connect fittings throughout. No electricity required; it runs on line pressure (40-100 psi).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClick-In Cartridge Changes\u003c\/strong\u003e - color-coded cartridges with integrated check valves, so filter changes do not require shutting off the water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple Maintenance\u003c\/strong\u003e - three filters yearly, membrane every 18 months. All four cartridges are stocked on our \u003ca href=\"\/products\/freshpoint-ro-replacement-filters\"\u003eFreshPoint replacement filters\u003c\/a\u003e page from $49.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompact Under-Sink Footprint\u003c\/h3\u003e\n\n\u003cp\u003eThe unit measures 14.57\" W x 5.46\" D x 12.54\" H and weighs 8.9 lbs, designed for feed water between 40 and 100 psi at 40 to 100 F, with TDS under 2,000 ppm, hardness under 10 gpg, iron, manganese, and sulfide each under 0.1 ppm, and chlorine under 2 ppm. It works on both city water and private wells; well water with iron, sediment, or high hardness should be treated upstream so the pre-filter and membrane are protected. It is backed by a 1-year Pentair warranty.\u003c\/p\u003e\n\n\u003ch3\u003eWhich RO Should You Buy?\u003c\/h3\u003e\n\n\u003cp\u003eThis is the NSF-certified quality tier of our lineup at $795. If \u003cstrong\u003ePFAS\u003c\/strong\u003e is your concern, buy the \u003ca href=\"\/products\/pfas-reverse-osmosis-system\"\u003eFreshPoint 5-stage GRO-575B\u003c\/a\u003e ($895) instead: it adds a fifth stage with certified 99.7% Total PFAS and VOC reduction. If you simply want great-tasting low-TDS drinking water without system certification, the \u003ca href=\"\/products\/pure-75-reverse-osmosis\"\u003ePure-75\u003c\/a\u003e ($595) is the value quick-change 75 GPD option, and the \u003ca href=\"\/products\/maw-50-reverse-osmosis-system\"\u003eMAW-50\u003c\/a\u003e ($275) is the budget 50 GPD pick. Not sure which fits your water? Call or text Aidan at \u003cstrong\u003e800-460-5810\u003c\/strong\u003e, send your water test, and he will confirm the right approach before you buy.\u003c\/p\u003e","brand":"Mid Atlantic Water","offers":[{"title":"Default Title","offer_id":54192345415964,"sku":"GRO-475B","price":795.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9523\/4605\/files\/gro475b-2000_cd62272a-01dc-4a74-a2c2-090253abeef7.png?v=1781120249","url":"https:\/\/midatlanticwater.net\/products\/freshpoint-reverse-osmosis-system","provider":"Mid Atlantic Water","version":"1.0","type":"link"}