brand,model,type,dims_text,height_in,side_a_in,side_b_in,tank_text,tank_gal,power,clearance,note,source,read
iSpring,RCC7,Reverse osmosis with tank,"15.5""L x 5.1""W x 18.0""H",18.0,15.5,5.1,3.2 gallon storage tank (no tank size given),3.2,"No (""doesn't require any power source"")",,,https://www.ispringfilter.com/products/5-stage-essence-ro-water-filtration-system-ispring-rcc7-5-stage-residential-under-sink-reverse-osmosis-water-filter-system-wqa-certified-75-gpd,18 Oct 2026
iSpring,RO500-BN,Tankless reverse osmosis,"17.5""L x 5.12""W x 16.25""H",16.25,17.5,5.12,,,Yes (booster pump; FAQ says the power cable is about 3 feet),,,https://www.ispringfilter.com/products/ispring-ro500-bn-tankless-ro-reverse-osmosis-water-filtration-system-500-gpd-fast-flow-brushed-nickel-faucet-21-pure-to-drain-ratio-white-nsf-certified,18 Oct 2026
APEC,ROES-50,Reverse osmosis with tank,"15.5"" L x 5.25"" W x 17"" H",17.0,15.5,5.25,"4 gallon tank, 11"" x 11"" x 15""",4,,,,https://www.apecwater.com/products/roes-50,18 Oct 2026
APEC,ROTL-600,Tankless reverse osmosis,"17.75""w x 5.50""d x 16.5""h",16.5,17.75,5.5,,,"Yes (""Electrical outlet is required"")",,,https://www.apecwater.com/products/rotl-600,18 Oct 2026
Aquasana,Claryum 3-Stage (AQ-6300),"Filter, no tank","4.25"" x 12"" x 9"" (L x W x H)",9.0,4.25,12.0,,,,"Mount at least 12"" above the cabinet floor for filter changes (install guide)",,https://www.aquasana.com/under-sink-water-filters/claryum-3-stage/brushed-nickel-100391689.html,18 Oct 2026
Aquasana,SmartFlow Reverse Osmosis (AQ-SFRO2),Reverse osmosis with tank,"Manifold 15"" x 4.5"" x 12.93"" (L x W x H)",12.93,15.0,4.5,"Tank 13.74"" x 9.06"" (H x D), 3.2 gallon total volume",3.2,,,,https://www.aquasana.com/reverse-osmosis-water-filters/smart-flow-reverse-osmosis/brushed-nickel-100385794.html,18 Oct 2026
A. O. Smith,AO-US-200 (2-stage),"Filter, no tank","Height 8.75 in., Width 4 in., Depth 8 in.",8.75,4.0,8.0,,,,,,https://www.aosmithatlowes.com/products/water-filters/drinking-water/ao-us-200,18 Oct 2026
A. O. Smith,Clean Reverse Osmosis (AO-US-RO-MB-4000),Reverse osmosis with tank,"Height 12.5 in., Width 4 in., Depth 12 in.",12.5,4.0,12.0,Water storage tank included (no tank size given),,,,,https://www.aosmithatlowes.com/products/water-filters/drinking-water/ao-us-ro-mb-4000/,18 Oct 2026
Waterdrop,G3P600,Tankless reverse osmosis,Product Dimensions (In) 18.11*5.67*17.73 (order not labeled),,,,,,"Yes (""Electricity Required: Yes"")",About 1 inch gap between the system and the cabinet (FAQ),The FAQ on the same page gives 17.72 for the last figure,https://www.waterdropfilter.com/products/waterdrop-reverse-osmosis-water-filtration-system,18 Oct 2026
Express Water,Alkaline RO (ROALK10MBN),Reverse osmosis with tank,Dimensions: 17 x 15 x 5 (order and unit not labeled),,,,Water Tank Size: 3.2 Gallon Water Capacity (the box list says 4 gallon water storage tank),,,,,https://www.expresswater.com/products/alkaline-ro-system-modern-brushed-nickel-faucet,18 Oct 2026
Frizzlife,PD600-TAM3,Tankless reverse osmosis,"PD600: 5.3""L x 14.7""W x 15.5"" (third figure not labeled); TAM3 filter: 5"" x 5"" x 13.5""",,,,,,,,,https://www.frizzlife.com/products/pd600tam3,18 Oct 2026