{"title":"Reverse Osmosis Systems","description":"","products":[{"product_id":"maw-50-reverse-osmosis-system","title":"MAW-50 Reverse Osmosis System - 4 or 5 Stage, 50 GPD","description":"\u003cdiv class=\"product-description-seo\"\u003e\n\u003ch2\u003eMAW-50 Reverse Osmosis System - Real Under-Sink RO From $275\u003c\/h2\u003e\n\n\u003cp\u003eThe MAW-50 is the value tier of our reverse osmosis lineup: a tank-based under-sink \u003cstrong\u003ereverse osmosis system\u003c\/strong\u003e built around a \u003cstrong\u003e50 GPD Toray thin-film composite membrane\u003c\/strong\u003e, available as a \u003cstrong\u003e4-stage ($275)\u003c\/strong\u003e or \u003cstrong\u003e5-stage ($325)\u003c\/strong\u003e. It removes what no pitcher or fridge filter can touch: dissolved solids, lead, fluoride, nitrates, and sodium come out at the membrane, and the \u003cstrong\u003e3.2 gallon NSF-approved storage tank\u003c\/strong\u003e keeps finished water pressurized and ready at the included \u003cstrong\u003echrome long-reach lead-free faucet\u003c\/strong\u003e. No electricity required; the system runs on line pressure alone (40 psi or more recommended). See the full lineup in our \u003ca href=\"\/collections\/reverse-osmosis-systems\"\u003ereverse osmosis collection\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Makes the MAW-50 Worth $275\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e50 GPD Toray TFC membrane\u003c\/strong\u003e - the same membrane technology as premium systems. A family drinks and cooks with 2-4 gallons a day; this makes that many times over.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear sediment pre-filter housing\u003c\/strong\u003e - see the cartridge loading at a glance and change filters when your water says so, not on a calendar guess.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble o-ring housings\u003c\/strong\u003e - every filter housing seals twice for leak protection in the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEverything in the box\u003c\/strong\u003e - push-connect fittings, 3\/8\" faucet tubing, angle stop adapter valve, lead-free faucet, and the filter wrench.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheap to own\u003c\/strong\u003e - standard-format cartridges mean a \u003ca href=\"\/products\/nelsen-ro-replacement-filter-pack\"\u003e$49-$59 filter pack\u003c\/a\u003e every 6-12 months and a \u003ca href=\"\/products\/tfc-50-replacement-membrane\"\u003e$135 TFC-50 membrane\u003c\/a\u003e every 2-3 years.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e4-Stage or 5-Stage?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e4-stage (NRO4-50)\u003c\/strong\u003e runs sediment, carbon block, RO membrane, and inline carbon post-filter. The \u003cstrong\u003e5-stage (NRO5-50)\u003c\/strong\u003e adds a second carbon block pre-filter ahead of the membrane. Chlorine is what wears out TFC membranes, so the extra block matters most on \u003cstrong\u003eheavily chlorinated city water\u003c\/strong\u003e: more chlorine contact before the membrane means longer membrane life and better taste protection for $50 more. On well water or lightly treated supplies, the 4-stage does the same job.\u003c\/p\u003e\n\n\u003ch3\u003eHonest About Certification\u003c\/h3\u003e\n\u003cp\u003eThe storage tank is NSF-approved, but this system is \u003cstrong\u003enot NSF\/ANSI system-certified\u003c\/strong\u003e, and we will not pretend otherwise. RO as a technology is proven for dissolved solids, lead, and fluoride; what the MAW-50 skips is the certification paperwork, and that is a real part of why it costs $275 instead of $800. If certified numbers matter to you, step up to the \u003ca href=\"\/products\/freshpoint-reverse-osmosis-system\"\u003eFreshPoint RO\u003c\/a\u003e ($795, NSF\/ANSI 42 + 53 + 58 system certification) or the \u003ca href=\"\/products\/pfas-reverse-osmosis-system\"\u003ePFAS RO\u003c\/a\u003e ($895, certified PFAS reduction). If you want tool-free quarter-turn filter changes and 75 GPD, the \u003ca href=\"\/products\/pure-75-reverse-osmosis\"\u003ePure-75\u003c\/a\u003e ($595) is the middle step.\u003c\/p\u003e\n\n\u003ch3\u003eWell Water? Read This First\u003c\/h3\u003e\n\u003cp\u003eRO handles dissolved contaminants, but iron, hardness, and heavy sediment will foul the membrane if they reach it untreated. If your well stains fixtures or smells, treat that upstream first. Start with a \u003ca href=\"\/products\/well-water-test-kit\"\u003ewell water test kit\u003c\/a\u003e or send us the lab report you already have: call or text Aidan at \u003cstrong\u003e800-460-5810\u003c\/strong\u003e, 7 days a week, and he will confirm the right configuration before you spend anything.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFree shipping on every system. 7-day-a-week support. Real water treatment specialists with 30+ years of experience.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"midatlanticwater.net","offers":[{"title":"4-Stage (NRO4-50)","offer_id":31580031123501,"sku":"NRO4-50","price":275.0,"currency_code":"USD","in_stock":true},{"title":"5-Stage (NRO5-50)","offer_id":54192355639580,"sku":"NRO5-50","price":325.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9523\/4605\/files\/nro4-50-2000_3ac5e9cd-38d4-4d69-8437-fdc67d2fcd3c.png?v=1781120530"},{"product_id":"pure-75-reverse-osmosis","title":"Pure-75 Reverse Osmosis System - Quarter-Turn Quick Change, 75 GPD","description":"\u003cdiv class=\"product-description-seo\"\u003e\n\u003ch2\u003ePure-75 Reverse Osmosis System: The Easiest-Maintenance RO We Sell\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003ePure-75\u003c\/strong\u003e is a 4-stage, 75 GPD under-sink \u003cstrong\u003ereverse osmosis system\u003c\/strong\u003e built around one idea: filter changes should not be a project. Every cartridge disengages with a \u003cstrong\u003equarter twist of the wrist, without shutting off the water\u003c\/strong\u003e, even with the home's plumbing under full pressure. No housing wrench, no sump full of water to dump in the sink, no o-rings to fish out and re-seat. A complete filter change takes under 2 minutes.\u003c\/p\u003e\n\n\u003cp\u003eThe 4-stage train covers the fundamentals of great drinking water: a \u003cstrong\u003e5 micron sediment filter\u003c\/strong\u003e, a \u003cstrong\u003ecarbon block pre-filter\u003c\/strong\u003e, a \u003cstrong\u003e75 GPD TFC reverse osmosis membrane\u003c\/strong\u003e, and a \u003cstrong\u003ecarbon block post-filter\u003c\/strong\u003e that polishes taste on the way to the faucet. Reverse osmosis reduces dissolved minerals, bad tastes, and odors, and the membrane rejects the dissolved solids that carbon alone cannot touch. See the full lineup in our \u003ca href=\"\/collections\/reverse-osmosis-systems\"\u003ereverse osmosis collection\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-stage quick-change RO unit\u003c\/strong\u003e with all four Twist \u0026amp; Loc cartridges installed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.2 gallon storage tank\u003c\/strong\u003e - polypropylene-coated, NSF-approved white steel, so filtered water is waiting at the faucet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome lead-free long-reach faucet\u003c\/strong\u003e for the sink\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/8\" tank-to-faucet delivery line\u003c\/strong\u003e - the larger line fills your glass noticeably faster than the 1\/4\" line most budget RO units use\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eQuick-connect fittings, angle stop adapter valve, filter wrench, and installation hardware\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e to all lower 48 states\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReal Numbers, Stated Honestly\u003c\/h3\u003e\n\u003cp\u003eThe membrane is rated at \u003cstrong\u003e75 gallons per day\u003c\/strong\u003e nominal. Actual production is approximately \u003cstrong\u003e30.65 gallons per day\u003c\/strong\u003e (116 liters) at standard test conditions, and real-world output varies with feed pressure and temperature. For perspective, a family drinks and cooks with roughly 2 to 4 gallons a day, so the Pure-75 produces roughly ten times what you will actually draw, and the 3.2 gallon tank means the water is already made when you open the faucet. The system runs on line pressure alone: \u003cstrong\u003eno electricity required\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eOne more honest note: the Pure-75 system itself is \u003cstrong\u003enot NSF system-certified\u003c\/strong\u003e (the steel storage tank is NSF approved). If a third-party system certification matters to you, our \u003ca href=\"\/products\/freshpoint-reverse-osmosis-system\"\u003ePentair FreshPoint 4-stage RO\u003c\/a\u003e ($795) carries NSF\/ANSI 42, 53, and 58 system certification, and our \u003ca href=\"\/products\/pfas-reverse-osmosis-system\"\u003ePFAS Reverse Osmosis System\u003c\/a\u003e ($895) adds certified 99.7% Total PFAS reduction.\u003c\/p\u003e\n\n\u003ch3\u003eMaintenance Costs You Can Predict\u003c\/h3\u003e\n\u003cp\u003eThe sediment and two carbon block cartridges change \u003cstrong\u003eevery 6 months\u003c\/strong\u003e; the membrane changes \u003cstrong\u003eevery 24 months\u003c\/strong\u003e. The \u003ca href=\"\/products\/pure-75-filter-replacement-kit\"\u003ePure-75 Filter Replacement Kit\u003c\/a\u003e ($195) includes all four cartridges, including the membrane. Between membrane changes you only need the sediment and carbon cartridges: call or text \u003cstrong\u003e800-460-5810\u003c\/strong\u003e and we will ship individual cartridges, including an optional alkalinity remineralization cartridge if you prefer mineral-added taste.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Reverse Osmosis System Should You Buy?\u003c\/h3\u003e\n\u003cp\u003eWe keep the ladder simple. The \u003ca href=\"\/products\/maw-50-reverse-osmosis-system\"\u003eMAW-50\u003c\/a\u003e ($275) is the value pick: same core RO technology with standard filter housings. The \u003cstrong\u003ePure-75\u003c\/strong\u003e ($595) is for people who want the maintenance to be effortless: quarter-turn changes, no shutoff, no spills. Our \u003ca href=\"\/products\/freshpoint-reverse-osmosis-system\"\u003ePentair FreshPoint 4-stage RO\u003c\/a\u003e ($795) adds NSF\/ANSI 42 + 53 + 58 system certification, and the \u003ca href=\"\/products\/pfas-reverse-osmosis-system\"\u003ePFAS RO\u003c\/a\u003e ($895) is the certified answer for forever chemicals. On well water, test first with a \u003ca href=\"\/products\/well-water-test-kit\"\u003ewell water test kit\u003c\/a\u003e so iron, sediment, or bacteria get handled upstream of the membrane.\u003c\/p\u003e\n\n\u003cp\u003eNot sure which fits your water? Call or text Aidan at \u003cstrong\u003e800-460-5810\u003c\/strong\u003e, 7 days a week, and he will size it from your actual water, not a sales script.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFree shipping on every system. 7-day-a-week support. Real water treatment specialists with 30+ years of experience.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"midatlanticwater.net","offers":[{"title":"Default Title","offer_id":31580031975469,"sku":"TWIST-LOC-RO-75 (full kit)","price":595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9523\/4605\/files\/pure75-2000.png?v=1781102778"},{"product_id":"pure-75-filter-replacement-kit","title":"Pure-75 Filter Replacement Kit (Complete Set with Membrane)","description":"\u003cdiv class=\"product-description-seo\"\u003e\n\u003ch2\u003ePure-75 Filter Replacement Kit: Every Cartridge, Including the Membrane\u003c\/h2\u003e\n\n\u003cp\u003eThis is the complete replacement cartridge set for the \u003ca href=\"\/products\/pure-75-reverse-osmosis\"\u003ePure-75 Reverse Osmosis System\u003c\/a\u003e: \u003cstrong\u003e1 sediment filter, 2 carbon block filters, and 1 x 75 GPD RO membrane\u003c\/strong\u003e. Every cartridge is the quarter-turn Twist \u0026amp; Loc quick-change design, so each one swaps in seconds \u003cstrong\u003ewithout shutting off the water\u003c\/strong\u003e, even with the system under full pressure. No housing wrench, no spills, no o-rings.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x sediment filter\u003c\/strong\u003e - strips sand, silt, and rust before the carbon stages\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 x carbon block filters\u003c\/strong\u003e - the pre-filter that protects the membrane from chlorine and the post-filter that polishes taste at the faucet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 x 75 GPD TFC reverse osmosis membrane\u003c\/strong\u003e - the stage that rejects dissolved solids\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e to all lower 48 states\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Replacement Schedule\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003esediment and both carbon blocks change every 6 months\u003c\/strong\u003e; the \u003cstrong\u003emembrane changes every 24 months\u003c\/strong\u003e. That makes this kit a full refresh of the system: it covers a membrane change plus the filter set that goes in alongside it. Between membrane changes you only need the sediment and carbon cartridges. Call or text \u003cstrong\u003e800-460-5810\u003c\/strong\u003e and we will ship individual cartridges, including the optional \u003cstrong\u003ealkalinity remineralization cartridge\u003c\/strong\u003e if you prefer mineral-added taste.\u003c\/p\u003e\n\n\u003ch3\u003eChanging Filters Takes Under 2 Minutes\u003c\/h3\u003e\n\u003cp\u003eEach cartridge disengages with a quarter twist of the wrist and the flow stops automatically. Twist the new cartridge in until it locks, and you are done. Staying on schedule is what keeps an RO membrane alive for its full 24 months and keeps the water tasting the way it did on day one, and the Pure-75 makes the schedule easy enough that it actually happens.\u003c\/p\u003e\n\n\u003cp\u003eQuestions about which cartridges are due, or want a reminder schedule? Call or text Aidan at \u003cstrong\u003e800-460-5810\u003c\/strong\u003e, 7 days a week.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFree shipping. 7-day-a-week support. Real water treatment specialists with 30+ years of experience.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"midatlanticwater.net","offers":[{"title":"Default Title","offer_id":31580041576493,"sku":"TWIST-SEDIMENT | TWIST-CARBON (x2) | TWIST-MEMBRANE-75","price":195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9523\/4605\/files\/pure75-kit-2000.png?v=1781120586"},{"product_id":"tfc-50-replacement-membrane","title":"TFC-50 Replacement RO Membrane (50 GPD)","description":"\u003cdiv class=\"product-description-seo\"\u003e\n\u003ch2\u003eTFC-50 Replacement RO Membrane - The Factory-Original Element for the MAW-50\u003c\/h2\u003e\n\n\u003cp\u003eThe TFC-50 is a \u003cstrong\u003e50 GPD thin-film composite reverse osmosis membrane made by Toray\u003c\/strong\u003e, the exact element the \u003ca href=\"\/products\/maw-50-reverse-osmosis-system\"\u003eMAW-50 reverse osmosis system\u003c\/a\u003e ships with from the factory. One element fits \u003cstrong\u003eboth the 4-stage (NRO4-50) and 5-stage (NRO5-50)\u003c\/strong\u003e configurations; the two systems share the same horizontal membrane housing.\u003c\/p\u003e\n\n\u003cp\u003eThis is the stage that does the actual dissolved-solids removal in your RO system. The sediment and carbon cartridges protect it; the membrane is what rejects \u003cstrong\u003eTDS, lead, fluoride, nitrates, and sodium\u003c\/strong\u003e from the water your family drinks.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Replace It\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvery 2-3 years\u003c\/strong\u003e under normal conditions, sooner on hard or high-TDS feed water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOr when your TDS meter says so:\u003c\/strong\u003e test the RO faucet against tap water. When the RO reading creeps toward 10-20% of tap TDS or production slows, the membrane is fading. A basic TDS meter costs about $10 and removes the guesswork.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProtect the Element You Just Bought\u003c\/h3\u003e\n\u003cp\u003eMembrane life is decided upstream. Chlorine destroys TFC membranes, so fresh carbon blocks matter: the \u003ca href=\"\/products\/nelsen-ro-replacement-filter-pack\"\u003eMAW-50 replacement filter pack\u003c\/a\u003e ($49-$59, every 6-12 months) is what keeps this $135 element alive for its full 2-3 years. If the pack is more than 6 months old, change both in one session. And if your membranes keep dying early, the cause is usually hardness, iron, or exhausted pre-filters; call or text Aidan at \u003cstrong\u003e800-460-5810\u003c\/strong\u003e and we will find the real problem instead of selling you another membrane.\u003c\/p\u003e\n\n\u003cp\u003eThe swap takes about 20 minutes: relieve pressure, unscrew the housing cap, pull the old element, seat the new one o-ring end first, and flush the first 1-2 tanks before drinking. Full steps are in the replacement tab above.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFree shipping. 7-day-a-week support. Real water treatment specialists with 30+ years of experience.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"midatlanticwater.net","offers":[{"title":"Default Title","offer_id":31580043083821,"sku":"TLC-50","price":135.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9523\/4605\/files\/tlc-50-2000_91c9c822-22a8-41ca-97ce-ac53ff842174.png?v=1781120976"},{"product_id":"romate-reverse-osmosis-storage-tank-20-gallons","title":"ROmate-40 Reverse Osmosis Storage Tank (16 x 33)","description":"\u003cdiv class=\"product-description-seo\"\u003e\n\u003ch2\u003eROmate-40 Reverse Osmosis Storage Tank: For Homes That Outrun a Standard RO Tank\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eROmate-40\u003c\/strong\u003e is a Pentair Structural reverse osmosis storage tank with \u003cstrong\u003e40 gallons of total volume\u003c\/strong\u003e in a \u003cstrong\u003e16\" x 33\" shell\u003c\/strong\u003e. It exists for one situation: you love your RO water, and the standard 3.2 to 4.4 gallon under-sink tank keeps running empty. Because an RO membrane only makes a few dozen gallons per day, the storage tank is what determines how much water you can draw at once. A bigger tank means the coffee bar, the big family, the aquarium top-off, or the light commercial sink never waits on the membrane.\u003c\/p\u003e\n\n\u003ch3\u003eAn Honest Word About Capacity\u003c\/h3\u003e\n\u003cp\u003eThe \"40\" in ROmate-40 is the tank's \u003cstrong\u003etotal volume: 40 gallons\u003c\/strong\u003e. Like every bladder-style RO tank, the usable drawdown (the amount you can actually pour before the tank needs to refill) is lower, because part of the tank holds the compressed air charge that pushes water out. The exact drawdown depends on your air precharge setting and your feed pressure; roughly half of total volume is a reasonable expectation in typical residential setups, but we will not pretend there is one precise number. If a seller quotes you \"40 gallons at the faucet\" from any 40 gallon RO tank, be skeptical. Call or text us at \u003cstrong\u003e800-460-5810\u003c\/strong\u003e with your system details and we will set expectations from your actual setup.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt by Pentair Structural\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e40 gallons total volume\u003c\/strong\u003e in a 16\" diameter x 33\" tall shell\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolyethylene inner shell with a seamless fiberglass exterior\u003c\/strong\u003e - corrosion-proof inside and out\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable air cell\u003c\/strong\u003e - serviceable and replaceable instead of throwing the tank away\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarges in any position\u003c\/strong\u003e - flexible placement in basements, closets, and back rooms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory air precharge around 10 psi\u003c\/strong\u003e - verify and adjust to your RO system's spec at install\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e to all lower 48 states\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWorks With Standard Residential RO Systems\u003c\/h3\u003e\n\u003cp\u003eThe ROmate-40 connects to standard residential reverse osmosis systems using a \u003cstrong\u003e1\/4\" connection\u003c\/strong\u003e, replacing or supplementing the small factory tank. Plumbing details vary by system, so \u003cstrong\u003everify the fitting size with us before ordering\u003c\/strong\u003e: call or text \u003cstrong\u003e800-460-5810\u003c\/strong\u003e and we will confirm compatibility with your unit, whether that is our \u003ca href=\"\/products\/pure-75-reverse-osmosis\"\u003ePure-75\u003c\/a\u003e, our \u003ca href=\"\/products\/maw-50-reverse-osmosis-system\"\u003eMAW-50\u003c\/a\u003e, or another brand's system. Browse the full lineup in our \u003ca href=\"\/collections\/reverse-osmosis-systems\"\u003ereverse osmosis collection\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWho Actually Needs This\u003c\/h3\u003e\n\u003cp\u003eLarge families that cook with RO water, coffee and espresso bars, restaurants and offices, aquarium and reef keepers, humidifiers and misting systems, and anyone running multiple RO faucets or an RO line to the fridge. If you only fill glasses and a coffee maker, a standard under-sink tank is plenty and this tank is overkill; we would rather tell you that than sell you 33 inches of fiberglass you do not need.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFree shipping. 7-day-a-week support. Real water treatment specialists with 30+ years of experience.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"midatlanticwater.net","offers":[{"title":"Default Title","offer_id":33971868074029,"sku":"RO-20","price":995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9523\/4605\/files\/romate-2000.png?v=1781120717"},{"product_id":"pfas-reverse-osmosis-system","title":"PFAS Reverse Osmosis System - Pentair FreshPoint 5-Stage (GRO-575B)","description":"\u003ch2\u003ePFAS Reverse Osmosis System - Certified 99.7% Total PFAS Reduction at the Kitchen Tap\u003c\/h2\u003e\n\n\u003cp\u003eThe Pentair FreshPoint GRO-575B is a 5-stage under-sink \u003cstrong\u003ePFAS reverse osmosis system\u003c\/strong\u003e certified by \u003cstrong\u003eIAPMO R\u0026amp;T against NSF\/ANSI 53 for Total PFAS reduction: up to 99.7%\u003c\/strong\u003e. In the certification test, challenge water containing PFOA at 500 ppt and PFOS at 1,000 ppt, plus PFHxS, PFNA, PFHpA, PFBS, and PFDA, was reduced to 20 ppt or less. PFAS have no color, taste, or smell, so the only way to confirm they are present is a \u003ca href=\"\/products\/pfas-water-test-kit\"\u003ePFAS water test\u003c\/a\u003e. This system removes them at the tap your family drinks and cooks from.\u003c\/p\u003e\n\n\u003cp\u003eThe full system carries \u003cstrong\u003eNSF\/ANSI 42, 53, and 58 plus CSA B483.1\u003c\/strong\u003e certifications from NSF International. Beyond PFAS, it reduces \u003cstrong\u003elead, arsenic V, fluoride, chromium 6, VOCs, and cysts\u003c\/strong\u003e, and rejects \u003cstrong\u003e95.5% of total dissolved solids\u003c\/strong\u003e. Learn more in our guide on \u003ca href=\"\/blogs\/guides\/pfas-in-drinking-water\"\u003ePFAS in drinking water\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt for Certified PFAS Removal\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIAPMO R\u0026amp;T Certified for Total PFAS\u003c\/strong\u003e - 99.7% reduction against NSF\/ANSI 53. A verified third-party number, not a marketing claim.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 Stages, 75 GPD Membrane\u003c\/strong\u003e - 21.08 gpd certified production rate at standard test conditions, with a 4.4 gallon storage tank so water is ready 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.\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 - pre and post filters yearly, membrane every 18 months, 675 gallon rated capacity. Replacement cartridges: F1GC-RC, FDF1-RC, F2B2-RC2 twin pack, and GRO75-RC membrane.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompact Under-Sink Footprint\u003c\/h3\u003e\n\n\u003cp\u003eThe unit measures 17.82\" W x 5.46\" D x 12.54\" H and weighs 10.7 lbs, designed for feed water between 40 and 100 psi at 40 to 100 F. It works on both city water and private wells; if your well has iron, manganese, or heavy sediment, those should be addressed upstream so the pre-filters and membrane are protected.\u003c\/p\u003e\n\n\u003ch3\u003eWhich RO Should You Buy?\u003c\/h3\u003e\n\n\u003cp\u003eIf PFAS is the reason you are shopping, this is the system: the PFAS performance is certified. Our \u003ca href=\"\/products\/pure-75-reverse-osmosis\"\u003ePure-75 reverse osmosis system\u003c\/a\u003e ($595) is the better value if you simply want low-TDS, great-tasting drinking water, but it has not been through PFAS certification testing. For whole-house PFAS coverage at every tap and shower, see our \u003ca href=\"\/products\/pfas-removal-system\"\u003etank-based PFAS removal system\u003c\/a\u003e. Not sure which fits your water? Call or text Aidan at \u003cstrong\u003e800-460-5810\u003c\/strong\u003e, send your \u003ca href=\"\/blogs\/faqs\/how-to-test-water-for-pfas\"\u003ePFAS test results\u003c\/a\u003e, and he will confirm the right approach before you buy.\u003c\/p\u003e","brand":"Mid Atlantic Water","offers":[{"title":"Default Title","offer_id":54191829942556,"sku":"GRO-575B","price":895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9523\/4605\/files\/gro575b-2000_a5a09768-5e12-4426-a218-86bbc6bd1bd8.png?v=1781100122"},{"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"},{"product_id":"freshpoint-ro-replacement-filters","title":"Pentair FreshPoint Replacement Filters (GRO-475B \u0026 GRO-575B)","description":"\u003ch2\u003ePentair FreshPoint Replacement Filters - Genuine Cartridges for the GRO-475B and GRO-575B\u003c\/h2\u003e\n\n\u003cp\u003eGenuine Pentair replacement cartridges for the FreshPoint under-sink reverse osmosis systems: the \u003ca href=\"\/products\/freshpoint-reverse-osmosis-system\"\u003e4-stage GRO-475B\u003c\/a\u003e and the \u003ca href=\"\/products\/pfas-reverse-osmosis-system\"\u003e5-stage PFAS-certified GRO-575B\u003c\/a\u003e. Every cartridge clicks in and out with an integrated check valve that stops the water automatically, so changes take minutes with \u003cstrong\u003eno water shutoff and no tools\u003c\/strong\u003e, and the color coding makes it impossible to seat a cartridge in the wrong slot.\u003c\/p\u003e\n\n\u003ch3\u003eThe Four Cartridges\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFDF1-RC Taste \u0026amp; Odor Pre-Filter ($59)\u003c\/strong\u003e - stage 1 in both systems. Carbon block plus poly spun sediment shell in one cartridge; it protects the membrane. Replace yearly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGRO75-RC 75 GPD RO Membrane ($159)\u003c\/strong\u003e - stage 2 in both systems. The high-efficiency Green RO membrane that does the certified heavy lifting. Replace every 18 months.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eF1B1-RC Cyst \u0026amp; Lead Carbon Block ($69)\u003c\/strong\u003e - stage 3 in the GRO-475B only. Replace yearly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eF1GC-RC GAC Post-Filter ($49)\u003c\/strong\u003e - the final polishing stage in both systems. Replace yearly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment, Honestly\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eGRO-475B (4-stage):\u003c\/strong\u003e all four cartridges on this page. Yearly cost is $177 for the three filters, plus the $159 membrane every 18 months.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGRO-575B (5-stage):\u003c\/strong\u003e the FDF1-RC, GRO75-RC, and F1GC-RC fit your system. The 575B's two middle carbon blocks are different: they are replaced together as the \u003cstrong\u003eF2B2-RC2 twin pack, which we do not stock on this page\u003c\/strong\u003e. Call or text \u003cstrong\u003e800-460-5810\u003c\/strong\u003e and we will get the twin pack to you with the rest of your order.\u003c\/p\u003e\n\n\u003cp\u003eWhy stay on schedule? The NSF-certified reduction numbers for lead, arsenic, fluoride, and TDS only hold while the cartridges are within their service life, and those contaminants have no taste or smell to warn you when a filter is spent. Not sure which cartridge is due? Call or text Aidan at \u003cstrong\u003e800-460-5810\u003c\/strong\u003e, 7 days a week.\u003c\/p\u003e","brand":"Mid Atlantic Water","offers":[{"title":"GAC Post-Filter (F1GC-RC)","offer_id":54192355705116,"sku":"F1G1-RC","price":49.0,"currency_code":"USD","in_stock":true},{"title":"Taste \u0026 Odor Pre-Filter (FDF1-RC)","offer_id":54192355770652,"sku":"FDF1-RC","price":59.0,"currency_code":"USD","in_stock":true},{"title":"Cyst \u0026 Lead Carbon Block (F1B1-RC)","offer_id":54192355803420,"sku":"F1B1-RC","price":69.0,"currency_code":"USD","in_stock":true},{"title":"75 GPD RO Membrane (GRO75-RC)","offer_id":54192355836188,"sku":"GRO75-RC","price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9523\/4605\/files\/freshpoint-filters-2000_1a054de0-5c28-48e6-96fc-2512ba1846c0.png?v=1781120534"},{"product_id":"nelsen-ro-replacement-filter-pack","title":"MAW-50 Replacement Filter Pack (4-Stage \u0026 5-Stage)","description":"\u003cdiv class=\"product-description-seo\"\u003e\n\u003ch2\u003eMAW-50 Replacement Filter Pack - Everything Your Yearly Filter Change Needs\u003c\/h2\u003e\n\n\u003cp\u003eThis is the complete replacement cartridge set for the \u003ca href=\"\/products\/maw-50-reverse-osmosis-system\"\u003eMAW-50 reverse osmosis system\u003c\/a\u003e, sold in the exact count your configuration needs. Change the pack every \u003cstrong\u003e6 to 12 months\u003c\/strong\u003e and the system's 50 GPD membrane stays protected and productive for years.\u003c\/p\u003e\n\n\u003ch3\u003ePick the Pack That Matches Your System\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Stage Pack ($49)\u003c\/strong\u003e - fits the MAW-50 4-stage (NRO4-50): 1x NP5 sediment cartridge, 1x Matrikx carbon block (32-250-125-975), 1x inline carbon post-filter (NINCF-10-QC).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-Stage Pack ($59)\u003c\/strong\u003e - fits the MAW-50 5-stage (NRO5-50): the same set plus a \u003cstrong\u003esecond Matrikx carbon block\u003c\/strong\u003e, matching that system's twin carbon pre-filter stages.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNot sure which system you have? Count the vertical housings under the sink: three means 4-stage, four means 5-stage. Or text a photo to \u003cstrong\u003e800-460-5810\u003c\/strong\u003e and we will tell you in a minute.\u003c\/p\u003e\n\n\u003ch3\u003eWhy the Schedule Matters\u003c\/h3\u003e\n\u003cp\u003eThe carbon blocks exist to strip chlorine before it reaches the thin-film composite membrane. Exhausted carbon is the number one early killer of RO membranes: stretch a $49 pack too far and the $135 membrane pays for it. The MAW-50's \u003cstrong\u003eclear sediment housing\u003c\/strong\u003e makes timing easy; when the cartridge looks loaded, change the pack. The swap takes about 15 minutes with the included filter wrench.\u003c\/p\u003e\n\n\u003ch3\u003eThe Membrane Is Separate, On Purpose\u003c\/h3\u003e\n\u003cp\u003eThe \u003ca href=\"\/products\/tfc-50-replacement-membrane\"\u003eTFC-50 replacement membrane\u003c\/a\u003e ($135) changes every \u003cstrong\u003e2 to 3 years\u003c\/strong\u003e, a different schedule than the filters, so bundling it would charge you for a membrane you usually do not need yet. A cheap TDS meter at the RO faucet tells you when it is time: when the reading creeps up, replace the membrane.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFree shipping. 7-day-a-week support. Real water treatment specialists with 30+ years of experience.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Mid Atlantic Water","offers":[{"title":"4-Stage Pack (NRO4-50)","offer_id":54192358719772,"sku":"NRO4-FILTERPACK","price":49.0,"currency_code":"USD","in_stock":true},{"title":"5-Stage Pack (NRO5-50)","offer_id":54192358785308,"sku":"NRO5-FILTERPACK","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/9523\/4605\/files\/nro-filterpack-2000_3bfd1177-b8b7-4943-8f6d-73a334a9d4fc.png?v=1781120757"}],"url":"https:\/\/midatlanticwater.net\/collections\/reverse-osmosis-systems.oembed","provider":"Mid Atlantic Water","version":"1.0","type":"link"}