VIOMI Vortex 6 600 GPD Tankless Under-Sink RO System

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Product guide

VIOMI Vortex 6 600 GPD Tankless Under-Sink RO System

The VIOMI Vortex 6 is a 600 GPD tankless reverse osmosis system for under-sink installation, with a claimed 9-stage filtration process and a dedicated smart faucet. It can suit buyers wanting a compact drinking-water setup, but installation requires countertop and drain-line holes, a dedicated electrical outlet, and use of the included faucet only.

At a glance

Tankless design is intended to filter water on demand and occupies a listed 16.3"L x 5"W x 12.8"H footprint.
The listing claims 9-stage filtration, TDS reduction, and NSF/ANSI 42, 53, and 372 certification.
A smart faucet LED is described as changing to orange to signal filter replacement.
The listing claims a 3:1 pure-to-drain ratio and over 1 ounce of water per second.

Price

$219.98Save 35%

Reference price: ~~$339.99~~

Price checked: Nov 14, 2026

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Often bought together

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Pros and cons

Pros

Tankless form avoids a storage tank and has a compact listed footprint.
The manufacturer describes tool-free filter replacement, with claimed replacement intervals of 48 months for the RO filter and 24 months for the PCB filter.
The included smart faucet is described as providing a filter-change reminder.

Cons

Requires a countertop hole for its faucet, a second hole under the sink for the drain pipe, and a standard dedicated electrical outlet.
Water can be dispensed only through the included faucet. The system cannot connect to other faucets, refrigerators, or ice makers.

Technical specifications

16 specifications

Identity
Brand	VIOMI
Model	Vortex 6

Filtration and capacity
Rated capacity	600 gallons
Listed filtration features	600 GPD Capacity, 9-Stage Filtration, Reduce TDS, Tankless
Purification method	Carbon Block, Reverse Osmosis
Maximum supported water TDS	800

Installation and power
Installation type	Under Sink
Container type	Tankless
Power configuration	Corded Electric

Dimensions and weight
Dimensions listed	16.3"L x 5"W x 12.8"H
Weight listed	20.1 pounds

Operating limits and service life
Lower temperature range	41 °F
Upper temperature rating	100 °F
RO filter life listed	48 months
PCB filter life listed	24 months

Warranty
Warranty description	One (1) Year Limited Warranty

What to know before buying

The claimed filter life varies with water consumption and usage. The manufacturer says startup TDS readings may initially be higher and recommends waiting 1 minute of steady operation before testing. It also says slight pump vibration and sound, and a small amount of residual water from factory circulation testing, can be normal.

What’s in the box

Included

PCB filter (1)
RO filter (1)
Smart faucet (1)
Installation kit (1)

Who is it for?

A good fit for

Households seeking a tankless under-sink RO system with a dedicated faucet and claimed high daily production capacity.
Buyers with room for the listed unit dimensions and the required faucet, drain, and electrical connections.
Users willing to follow filter-life reminders and replace filters according to their water use.

Less suited to

Anyone who needs RO water plumbed to a refrigerator, ice maker, or an existing non-included faucet.
Kitchens without space for the system, the required holes, or a suitable dedicated outlet.

VIOMI Vortex 6 600 GPD Tankless Under-Sink RO System · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 277 ratings

5 stars73%73%
4 stars8%8%
3 stars8%8%
2 stars2%2%
1 star9%9%

Customer feedback reports positive impressions of installation, ease of use, water taste, and the compact under-sink footprint. Noise feedback is mixed, and compatibility concerns include a report of difficulty connecting to a refrigerator water line. That limitation is consistent with the listing, which says the unit works only with its included faucet. The broadly favorable aggregate ratings are not a guarantee of individual results, especially for buyers sensitive to operating noise or seeking refrigerator plumbing.

Positive themes

Customers describe installation and use as easy.
Customers report good-tasting water and appreciate the small under-sink footprint.

Negative themes

A customer reported difficulty connecting the system to a refrigerator water inlet line, which the listing says is unsupported.

Mixed feedback

Noise impressions vary. Some customers find it quiet, while others describe it as noisy.

Frequently asked questions

Can this system feed a refrigerator or ice maker?

No. The listing says it cannot connect to refrigerators, ice makers, or other faucets and works only with the included faucet.

What installation provisions are required?

The listing specifies two holes, one in the countertop for the RO faucet and another under the sink for the drain pipe. It also requires a standard dedicated electrical outlet and recommends allowing 2.0"–3.9" rear clearance for tubing.

How often do the filters need replacement?

The listing gives 48 months for the RO filter and 24 months for the PCB filter, but says actual life depends on daily water consumption and usage.

What does the smart faucet indicator do?

The manufacturer says its LED turns orange when it is time to change filters.