Category
RO systems
11 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/ANSI 58 Certified Alkaline 6-Stage 75 GPD RO
Classic under-sink RO with alkaline remineralization stage for better taste — 75 GPD, six stages, NSF/ANSI 58 listed. · Under-sink drinking water polish on city supply (or well after whole-house train)
$198.76
in 2 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-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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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