Best NU Aqua Reverse Osmosis Systems with UV Filtration: 2 Spec-Based Picks
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You need the best NU Aqua reverse osmosis systems with UV Filtration for clean water. We compared 2 models using only published specs. The NU Aqua 100 GPD UV Under Sink RO leads because its 100 GPD capacity meets high-flow needs. This pick suits households prioritizing volume and UV purification. Other options like the 600 GPD tankless model offer space savings. These selections help you decide which system fits your kitchen layout and water usage.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | NU Aqua 100 GPD UV Under Sink RO Best overall | High-flow households needing UV purification | Check price of NU Aqua 100 GPD UV Under Sink RO on Amazon |
| 2 | NU Aqua 600 GPD Tankless RO Best budget | Space-conscious kitchens needing high flow | Check price of NU Aqua 600 GPD Tankless RO on Amazon |
The best fit for you
- You need high flow and UV protection for your family NU Aqua 100 GPD UV Under Sink RO The 100 GPD capacity and 6-stage UV filtration handle high volume needs.
- You want the most compact tankless system available NU Aqua 600 GPD Tankless RO Its tankless design and 600 GPD output save space while delivering fast water.
- You prefer alkaline water with UV purification NU Aqua 600 GPD Tankless RO This 5-stage system adds an alkaline filter to the UV purification process.
Our 2 picks
NU Aqua 100 GPD UV Under Sink RO
Best for: High-flow households needing UV purification
- Features
- UV Filtration (what this guide is about)
- Filtration Stages
- 6
- Capacity (GPD)
- 100 GPD
- Design
- Under sink
- Certification
- NSF
- Filtration Type
- Reverse osmosis, UV
View on Amazon: NU Aqua 100 GPD UV Under Sink RO Affiliate link
This under-sink reverse osmosis system offers 100 gallons per day of filtered water. It uses a 6-stage process that includes UV filtration for added purification. The unit features a lead-free stainless steel faucet and quick-connect fittings for easy setup. It is designed to fit under standard kitchen sinks. The system includes a PPM meter for testing water quality. It suits households needing high flow rates and advanced filtration.
Pros
- 100 GPD high flow rate
- 6-stage filtration with UV light
- NSF 100% lead-free faucet
- Includes PPM water testing meter
- Quick-connect fittings for installation
Cons
- Requires a water storage tank for operation
- 28-pound weight requires sturdy mounting
- No alkaline remineralization stage included
Good fit if
- You need a high daily water output
- You want UV sterilization for extra safety
- You prefer a lead-free faucet
Skip if
- You want a tankless design
- You need alkaline remineralization
- You have limited under-sink space
Verdict: NU Aqua 100 GPD 6-Stage UV RO System delivers reliable high-volume filtration for families who prioritize water purity and flow speed. It is best for users who want a robust under-sink solution with UV protection and do not mind the space required for a storage tank.
NU Aqua 600 GPD Tankless RO
Best for: Space-conscious kitchens needing high flow
- Features
- Alkaline Filter, UV Filtration, Remineralization (what this guide is about)
- Filtration Stages
- 5
- Capacity (GPD)
- 600 GPD
- Design
- Tankless, under sink
- Pure to Drain Ratio
- 2:1
- Filtration Type
- Reverse osmosis, alkaline, UV
View on Amazon: NU Aqua 600 GPD Tankless RO Affiliate link
This NU Aqua system combines reverse osmosis with UV-C filtration and an alkaline stage. It is a tankless design measuring 5.5 by 13.5 by 15.5 inches. You get 600 gallons per day with a 2:1 pure to waste ratio. The unit includes a smart LED faucet that changes color to signal filter changes. It suits you if you want high output without a storage tank.
Pros
- Tankless design saves under-sink space
- 600 GPD output capacity
- 2:1 pure to waste water ratio
- 5-stage filtration includes UV-C and alkaline
- LED faucet indicates filter status
Cons
- 25-pound weight may be heavy for some cabinets
- No mention of a bypass valve for manual water flow
- Limited to 5.5 inches width for narrow spaces
Good fit if
- You need high daily water output
- You want to save cabinet space
- You prefer direct-flow water without a tank
Skip if
- You require a storage tank for backup
- You need more than 600 GPD
- You want a system with fewer than 5 stages
Verdict: NU Aqua 600 GPD Tankless RO UV System offers a compact, high-output solution for kitchens needing tankless convenience. It fits you if you prioritize space savings and consistent flow over stored water reserves.
Specifications side by side
| Spec | NU Aqua 100 GPD UV Under Sink RO | NU Aqua 600 GPD Tankless RO |
|---|---|---|
| Filtration Stages | 6 | 5 |
| Capacity (GPD) | 100 GPD | 600 GPD |
| Design | Under sink | Tankless, under sink |
| Pure to Drain Ratio | not stated | 2:1 |
| Certification | NSF | not stated |
| Filtration Type | Reverse osmosis, UV | Reverse osmosis, alkaline, UV |
| Contaminants Removed | not stated | Sediment, rust, chlorine, VOCs, PFAS |
| Installation Type | Under sink | Under sink |
| Features | UV filter | LED smart faucet, remineralization |
| Capacity | 100 GPD | 600 GPD |
| Use | Drinking Water, Home, Kitchen | not stated |
| Color | White | White |
| Dimensions | 15 × 5.5 × 18 inches | 15.5 × 5.5 × 13.5 inches |
| Weight | 28 pounds | 25 pounds |
| Size | RO - Stage 6 UV | 5 Stage UV + Alkaline Tankless RO |
| Model | WU-100GPD-NP-UV | KF-600GPD-UV-ALK-2FTL |
Key Specs for Choosing NU Aqua RO
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Check daily water output
Your household size dictates the gallons per day rating. The NU Aqua 100 GPD UV Under Sink RO provides 100 gallons daily. This capacity suits families needing consistent volume for cooking and drinking. Larger households may require higher output rates. Smaller units might leave you waiting for refill. Match the GPD rating to your peak usage times. Ensure the system produces enough purified water for your daily routine without constant waiting.
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Decide on tankless design
Tankless models save under-sink space by eliminating storage tanks. The NU Aqua 600 GPD Tankless RO uses this compact design. It fits well in smaller cabinets where space is tight. Tanked systems like the 100 GPD model offer stored water reserves. Choose tankless if you prioritize immediate flow and cabinet clearance. Select tanked systems if you need buffered water availability. Consider your available under-sink dimensions before finalizing your choice.
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Review filtration stages count
The number of stages affects water purity and flow. The 100 GPD model features six filtration stages. This includes dedicated UV purification for added safety. The 600 GPD version uses five stages with alkaline filtration. More stages often mean broader contaminant removal. Fewer stages may simplify maintenance. Compare stage counts to match your purity needs. Verify that UV filtration is included in the stage count for complete protection against bacteria.
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Measure unit dimensions
Under-sink cabinets have strict size limits. The 100 GPD unit measures 15 inches long. The 600 GPD tankless model is 15.5 inches long. Widths are similar at 5.5 inches. Height varies from 13.5 to 18 inches. Measure your cabinet interior before buying. Ensure clearance for filter changes. Verify door swing does not obstruct access. Proper fit prevents installation issues and ensures easy maintenance access for future filter replacements.
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Verify installation type
Both listed systems are designed for under-sink installation. This placement keeps units hidden and secure. Under-sink setups require plumbing connections near your faucet. Ensure you have access to cold water lines. Professional installation may be needed for complex plumbing. Check your cabinet for nearby drain access. Proper installation ensures leak-free operation. Confirm your sink area accommodates the required plumbing connections before purchasing.
Frequently asked questions
Which NU Aqua RO system has the highest daily output?
The NU Aqua 600 GPD Tankless RO offers the highest capacity at 600 gallons per day. This model uses a tankless design with five filtration stages. It includes an alkaline filter and UV filtration. This setup provides high flow without requiring a storage tank.
Does the best overall NU Aqua system include UV filtration?
Yes, the NU Aqua 100 GPD UV Under Sink RO includes UV filtration. It features a six-stage process with Stage 6 dedicated to UV purification. This system is designed for high-flow households needing reliable water purity and volume.
Which NU Aqua RO system is tankless?
The NU Aqua 600 GPD Tankless RO is the tankless option on this list. It saves under-sink space by eliminating the need for a storage tank. This system delivers 600 GPD through a five-stage process that includes UV filtration and an alkaline filter.
What are the dimensions of the NU Aqua 100 GPD UV Under Sink RO?
The NU Aqua 100 GPD UV Under Sink RO measures 18 inches in height, 15 inches in length, and 5.5 inches in width. It weighs 28 pounds. These dimensions help you determine if it fits your under-sink cabinet space.
How many filtration stages does the 600 GPD model have?
The NU Aqua 600 GPD Tankless RO has five filtration stages. It combines standard RO filtration with UV purification and an alkaline filter. This five-stage setup targets contaminants while improving water taste through the added alkaline stage.
Is there a NU Aqua RO system with an alkaline filter?
Yes, the NU Aqua 600 GPD Tankless RO includes an alkaline filter. This feature is part of its five-stage filtration process. The system also uses UV filtration. This model is designed for users who want tankless convenience and enhanced water quality.
What is the model number for the best overall NU Aqua RO?
The model number for the best overall system is WU-100GPD-NP-UV. This is the NU Aqua 100 GPD UV Under Sink RO. It features a six-stage filtration process with UV protection. The system is white and weighs 28 pounds.