Spec sheet
DREO Reverse Osmosis Water Filter Countertop
DREO Reverse Osmosis Water Filter Countertop
Check current specs & priceClearFlow Grade · Water Treatment Lab
ClearFlow Grade
Expert reviews, honest comparisons, and the best deals on Water Filters — helping you make smarter buying decisions.
- Systems on the bench
- 10
- Buying guides
- 12
- Treatment paths
- 6
The System Matcher
What system does your water call for?
Enter your measured water hardness and household size. We run the published Water Quality Association sizing formula to point you to a system class and an illustrative annual filter cost — a starting estimate, not a tested result.
From your utility's water report or a test kit. 1 GPG = 17.1 mg/L (ppm).
Sizing assumes the WQA estimate of 75 gallons per person per day.
Where the formula points
32,000-grain water softener
Extremely hard water · target 32,000-grain
Illustrative annual salt cost: about $80–$150 (varies with hardness and use)
Published WQA sizing: 4 people × 75 gal/day × 15 GPG = 4,500 grains/day, ×7 days ≈ 31,500 grains of weekly capacity. The smallest standard class that clears that is shown — size up if you host guests or have well-water iron.
Read the matching buying guides
Illustrative only — figures come from published WQA sizing formulas and market price ranges, not a physical test. Well-water iron, flow rate, and salt efficiency change the right pick; verify specifications on the retailer's listing before buying.
On the bench
Systems on the bench
Every filtration system and softener we cover, read off its published spec sheet — grain capacity, stages, and rating, not a paid placement.
Spec sheet
Spec sheet
Varify 17in1 Complete Drinking Water Test Kit
Varify 17in1 Complete Drinking Water Test Kit
Check current specs & priceSpec sheet
Morton Clean and Protect Water Softener Salt Pellets
Morton Clean and Protect Water Softener Salt Pellets
Check current specs & priceSpec sheet
Spec sheet
PUREPLUS 5 Micron 10" x 4.5" Whole House Sediment and Carbon Water
PUREPLUS 5 Micron 10" x 4.5" Whole House Sediment and Carbon Water
Check current specs & priceSpec sheet
Instant 4-in-1 TDS Meter Digital Water Tester for Drinking Water
VARIFY — Instant 4-in-1 TDS Meter Digital Water Tester for Drinking Water
Check current specs & priceSpec sheet
MyHalos® Filtered Shower Head for Hard Water Filter
MyHalos® Filtered Shower Head for Hard Water Filter
Check current specs & priceSpec sheet
Filter United
Filter United — water and air filters. Current pricing and offers via our partner link.
Check current specs & priceSpec sheet
Frizzlife
Frizzlife — a water filtration and safety brand making RO systems, water filters and leak protectors.
Check current specs & priceTreatment paths
Explore by Topic
Pick the problem you're solving — hardness, well-water iron, drinking-water taste — and we'll point you to the published comparisons that fit.
Whole-House Filtration SystemsPoint-of-entry carbon and tank-based systems that filter every tap in the home.3 guidesWater Softeners & ConditionersSalt-based softeners and salt-free conditioners for hard-water homes.2 guidesReverse Osmosis SystemsUnder-sink and tankless RO systems for high-purity drinking water.3 guidesUnder-Sink & Countertop FiltersCompact point-of-use filtration for kitchens and rentals.1 guideWell & Problem-Water TreatmentSediment, iron, sulfur and pH treatment for private-well and problem water.2 guidesFilters, Cartridges & MaintenanceReplacement cartridges, salt, and the annual upkeep cost of owning a system.1 guide
Latest Insights
All guidesLatest Articles
Whole-House Filtration Systems5 min read
How much does a whole-house water filtration system cost in 2026?
Whole-house water filtration sticker prices range from $100 to over $3,000, but the number that matters most is total cost of ownership — equipment plus annual cartridge and maintenance costs over time. Based on published pricing and install estimates, here is what to budget by system type and house
- Well & Problem-Water Treatment6 min readHow to choose a well-water treatment system for iron and sulfur
- Water Softeners & Conditioners5 min readWhat size water softener do I need for my household and water hardness?
- Whole-House Filtration Systems5 min readWhole-house carbon filter vs point-of-use under-sink filter for city water
- Reverse Osmosis Systems5 min readBluevua reverse osmosis system review: specs, output, and filter costs
- Under-Sink & Countertop Filters5 min readClearly Filtered under-sink system review for renters and small kitchens
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