Category
RO systems
13 products — ordered by how often we mention them.
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iSpring RCC7-BN 5-Stage Reverse Osmosis System (NSF certified, 75 GPD)
Long-running iSpring classic with widely available replacement filters and a proven track record on well and municipal feeds. · NSF-certified 5-stage under-sink RO for lead, chlorine, and dissolved solids at the kitchen tap
$219.96
in 3 guides
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iSpring RCC7AK-BN NSF Certified, 75 GPD, Alkaline 6-Stage Reverse Osmosis System, pH+ Remineralization RO Water Filter System Under Sink Patented Top-Mounted Faucet Design for Easy Installation
Removing sodium from softened water at one drinking tap. 75 GPD with a remineralization stage so the water does not taste flat · Classic under-sink RO with alkaline remineralization stage for better taste — 75 GPD, six stages, NSF/ANSI 58 listed.
$198.75
in 3 guides
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Waterdrop G3P600 Reverse Osmosis System, 600 GPD Tankless
If you don't have under-sink space for a 4-gallon tank — no tank, no waiting, fills a glass in under five seconds. · 600 GPD tankless RO with NSF/ANSI 58 certification — higher output, less waste ratio than traditional RO
$428.99
in 2 guides
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APEC Water ROES-50, 5-Stage Under Sink Reverse Osmosis System, 50 GPD | NSF Certified 372 & 58, Reduces 99% of Impurities, DIY Installation
One or two people on softened water. 50 GPD is enough for drinking and cooking in a small household without a storage tank
$182.73
in 1 guide
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APEC Water ROES-50X 5-Stage Tank Reverse Osmosis System
50 GPD 5-stage tank RO for low-use households (single person or couple) where a smaller tank footprint matters
$262.27
in 1 guide
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APEC Water ROES-PH75 6-Stage Tank Reverse Osmosis System
75 GPD 6-stage tank RO with alkaline remineralization for 1-3 person households on a budget
$239.99
in 1 guide
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APEC Water ROES-PH75X 6-Stage Tank RO with Extra Filters
75 GPD 6-stage tank RO bundled with extra sediment/carbon pre-filters for the first 12 months of operation
$295.65
in 1 guide
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Express Water NSF Certified 5-Stage Under-Sink Reverse Osmosis System, 50 GPD, 3.2 Gallon Tank
Conventional 50 GPD under-sink RO for drinking-water treatment at one tap
$276.63
in 1 guide
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Express Water ROALK10D, 10-Stage Under Sink RO System, Alkaline, 100 GPD | NSF Certified 372, Deluxe Chrome Facuet, Reduces 99% of Impurities, BPA Free, Leak Detection
Large households or anyone who also wants ice, formula, or canned food on the same RO. 100 GPD is the most drinking water per day of the three systems here
$209.99
in 1 guide
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iSpring RO500AK Alkaline Tankless Reverse Osmosis System
NSF/ANSI 58 tankless RO with alkaline remineralization and 2:1 drain ratio for drinking-water flavor
$625.06
in 1 guide
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Waterdrop G2P600 Under-Sink RO System, 600 GPD Tankless
Higher-flow 600 GPD tankless RO when cabinet space and faster dispensing matter
$289.00
in 1 guide
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Waterdrop G3P800 800 GPD Tankless Reverse Osmosis System
800 GPD direct-flow tankless RO for 4+ person households or fridge/ice-maker use — 3:1 pure-to-drain ratio
$759.00
in 1 guide
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Waterdrop G5P500A 8-Stage Tankless Reverse Osmosis System
500 GPD direct-flow tankless RO with 8-stage filtration for 1-3 person households — no tank, 2:1 pure-to-drain ratio
$229.99
in 1 guide