Delta Faucet Clarifi Under Sink Review: Who It Fits and Who Should Skip It

What stands out

• Six-stage reverse osmosis filtration removes over 90 contaminants, including PFAS, lead, and arsenic.
• Certified by NSF 58, 42, 53, 401, 372, and ASSE 1086 for clean water performance.
• Tankless design uses half the water of tanked systems with a 2:1 filtered-to-waste ratio.
• Synchronized two-year filter life allows tool-free changes in under a minute.
• Includes a stainless faucet with Touch-Clean spray holes to resist calcium and lime build-up.

Who it fits

Key specs for the Clarifi

Design: Tankless

This system has no storage tank. It produces water only when you turn on the faucet. You get fresh water on demand without waiting for a tank to fill. This saves cabinet space and prevents stale water from sitting. It suits buyers with limited under-sink storage who want continuous flow without the bulk of traditional tanks.

Filtration Stages: 6

The water passes through six distinct filter layers. Each stage targets specific contaminants, from sediment to fine particles. More stages generally mean broader protection against various impurities. This setup helps remove microplastics, lead, and chlorine. You get thorough filtration in a single pass, which is standard for modern tankless units.

Pure to Drain Ratio: 2:1

For every two cups of clean water, one cup goes down the drain. This is more efficient than many tanked systems that waste more water. You use less water overall while getting the same amount of filtered output. This ratio helps reduce water bills and environmental impact compared to older, less efficient reverse osmosis models.

Certification: NSF 58, 42, 53, 401, 372, ASSE 1086

These codes verify the system meets strict safety and performance standards. NSF 58 covers reverse osmosis quality. NSF 42 and 53 handle taste and health contaminants. NSF 401 targets emerging compounds. NSF 372 ensures lead-free materials. ASSE 1086 confirms efficiency. These certifications give you proof that the claims about contaminant removal are independently tested and verified.

Delta Clarifi Design and Build Details

The listing describes the unit as a compact, tankless system. It measures eighteen inches in length, sixteen inches in height, and six and a quarter inches in width. This footprint fits under most standard kitchen sinks. The tankless design removes the need for a bulky storage tank. You save cabinet space and avoid waiting for water to accumulate. The system produces water only when you turn on the faucet.

The faucet features a stainless finish. It includes Touch-Clean spray holes. You can wipe away calcium and lime buildup with a touch of your finger. The SpotShield finish resists water spots and fingerprints. This makes daily cleaning easier and keeps the fixture looking clean with minimal effort.

The system uses fewer hoses than tanked models. According to the listing, this reduces the number of connections required during installation. The compact layout simplifies the setup process. You do not need to empty or clean a storage tank. This design choice supports easier maintenance and a cleaner under-sink environment. The unit relies on six stages of reverse osmosis filtration to deliver water.

Setup and everyday use details

The Clarifi system is designed for under-sink installation. The compact dimensions allow it to fit in most standard cabinets. The tankless design simplifies the setup process. You make fewer hose connections compared to traditional tanked units. This reduces the number of manual connections required during installation. There is no tank to empty or clean, which further streamlines the initial setup. Daily use focuses on convenience and maintenance. The system uses six stages of reverse osmosis filtration. You benefit from synchronized filter lives that last two years. Changing these filters is a tool-free process. You can remove and replace them in less than a minute. This low-maintenance approach means less downtime for you. The unit operates with a two-to-one pure-to-drain ratio. This efficiency means it uses half the water of tanked systems. It is certified by the American National Standards Institute for this performance. The accompanying faucet features Touch-Clean spray holes. You can wipe away calcium and lime buildup with a simple touch. The SpotShield finish resists water spots and fingerprints. This keeps the faucet looking clean with minimal effort. The system meets five NSF certifications and ASSE 1086. These standards ensure the water quality meets rigorous safety benchmarks. You get filtered water on demand without waiting for a tank to fill. This provides fresh water whenever you need it. The lifetime limited warranty covers the kitchen faucet. This adds confidence to your installation and long-term use.

Before You Buy The Clarifi

You need a compatible faucet to use this system. The Clarifi requires a Delta kitchen faucet with Touch-Clean spray holes. If your current faucet does not match, you must budget for a new one. The unit measures eighteen inches long, sixteen inches high, and six and a quarter inches wide. Verify your under-sink cabinet has enough depth and width. You also need access to a cold water line and a drain for the waste water. Filter changes are tool-free and take under a minute. The filters last two years and are synchronized. This simplifies upkeep compared to systems with staggered filter lives. The 2:1 pure-to-drain ratio reduces water waste. This makes it more efficient than many tanked competitors. If you already have a matching Delta faucet, this system fits well. If not, the extra cost of the faucet may outweigh the benefits. Check your cabinet space and faucet type first.

Check before you buy

• Confirm your kitchen faucet is a Delta model with Touch-Clean holes
• Measure under-sink cabinet dimensions against eighteen by sixteen by six and a quarter inches
• Ensure access to a cold water line and a drain pipe
• Check if you want to replace your current faucet to match the system

The product at a glance

1

Delta Clarifi Tankless RO System

Best for: space-conscious homes needing certified PFAS removal

Filtration Stages

6

Design

Tankless

Pure to Drain Ratio

2:1

Certification

NSF 58, 42, 53, 401, 372, ASSE 1086

Filtration Type

Reverse osmosis

Installation Type

Under sink

View on Amazon: Delta Clarifi Tankless RO System Affiliate link

The Delta Clarifi is a tankless under-sink reverse osmosis system with six filtration stages. It removes over 90 contaminants, including PFAS and lead, and holds five NSF certifications. The unit uses half the water of tanked systems, achieving a 2:1 pure-to-waste ratio. Its compact design fits under most sinks, and synchronized filters last two years with tool-free changes.

Pros

• Six-stage reverse osmosis filtration removes over 90 contaminants.
• Certified by NSF 58, 42, 53, 401, and 372.
• Tankless design uses half the water of traditional systems.
• Synchronized filters last two years with tool-free changes.
• 2:1 pure-to-waste water ratio exceeds ANSI standards.

Cons

• Requires under-sink space for the compact unit.
• No mention of a dedicated faucet in the system specs.
• Filter replacement requires purchasing specific long-life units.

Good fit if

• You want to remove PFAS and heavy metals.
• You prefer tankless systems to save space.
• You need certified water safety standards.

Skip if

• You have limited under-sink storage space.
• You prefer a system with a built-in tank.
• You need a faucet included in the box.

Verdict: The Delta Clarifi Tankless RO System delivers certified contaminant removal and water efficiency in a compact footprint. It fits buyers who prioritize NSF standards and low maintenance over traditional tank-based storage.

Specifications side by side

Frequently asked questions

See also

• delta faucet clarifi under sink alternatives
• best reverse osmosis systems under 150
• best delta kitchen faucets under 500
• wmxqx undermount laundry sink faucet review