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Under Counter RO System with 600 GPD High Flow Rate
SimPure Q3-600 is equipped with a high-performance 600G RO membrane, offering an impressive flow rate that fills an 8-ounce glass in just 8 seconds. Whether you're quenching your thirst, cooking, or preparing drinks, you'll enjoy instant access to fresh, purified water without any delays. Its rapid filtration ensures you never have to wait, making it the perfect choice for busy kitchens, offices, or even RVs, all while maintaining the purity and taste of your water.
Advanced 7-Stage Filtration Water Filter for Home Under Sink
Experience the superiority of 7-stage filtration with SimPure Q3-600 Under Sink Tankless RO System. The CF filter removes 99.99% of large particles, residual chlorine, color, and odors, while the RO filter eliminates 99.99%+ of PFAS: PFOA & PFOS, heavy metals (lead, arsenic, uranium), TDS (nitrates, nitrites), chloride, fluoride, microplastics, ethylene glycol, vinyl chloride, and acrylic acid. (See SGS Test Report for more Details). It can be called the best 7 stage under sink water filtration system.


Automatic Flushing System – Fresh Water Ready Whenever You Need It
SimPure Q3-600 series is equipped with proprietary technology that addresses the common high TDS issue in the first glass of water, preventing off-tastes. Enjoy consistently refreshing, crisp water with every pour. This intelligent system also optimizes RO filter longevity, requiring replacement just once a year.
Compact Tankless Design: Efficient Space-Saving Under Counter RO System
SimPure Q3-600 under-sink RO system adopts a sleek tankless design, offering a steady supply of filtered water without occupying extra space. With 30% more room than conventional RO systems, it fits seamlessly into any kitchen layout and minimizes routine upkeep.


2:1 Low Pure to Drain Ratio: Perfect 7 Stage Under Sink Water Filtration System
With a 2:1 low wastewater ratio, the SimPure Q3-600 under-sink RO system delivers 2 cups of filtered drinking water for every 1 cup of waste. This efficient design conserves up to 8 times more water than typical RO systems, helping you save on bills while supporting eco-conscious living. Enjoy convenient, cost-effective filtration with the Q3-600.
User-Friendly Installation: Convenient Maintenance for Undersink RO Water System
SimPure Q3-600 is designed for easy DIY installation. The process is simple, with installation videos available for guidance. All necessary accessories are included, and the step-by-step instructions are clearly illustrated in the manual. This saves you the cost of hiring professional installers, helping you cut down on installation fees.
Innovative Design: Can be Connected to Refrigerator and Ice Maker


Customers' Real Review Videos on SimPure Q3-600 Tankless RO System
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Compare Q Series |
Q3-600
$179.99
$329.99
$150 Off
|
Q3-600U
$256.99
$356.99
$100 Off
|
Q3-600A
$224.99
$334.99
$110 Off
|
|---|---|---|---|
| Flow Rate | |||
| Flow Rate | 600 GPD | 600 GPD | 600 GPD |
| Alkaline Mineralization | |||
| Alkaline Mineralization | x | x | √ |
| TDS Display | |||
| TDS Display | x | √ | x |
| Pure to Drain Rate | |||
| Pure to Drain Rate | 2:1 | 2:1 | 2:1 |
| Filtration Stages | |||
| Filtration Stages | 7-Stage | 8-Stage | 8-Stage |
| Filter lifespan | |||
| Filter lifespan |
CF-6Mths RO-12Mths |
CF-6Mths RO-12Mths |
CF-6Mths ALK-6Mths RO-12Mths |
| Average annual cost | |||
| Average annual cost | $116.97 | $116.97 | $196.95 |
| Warranty | |||
| Warranty | 2 Years | 2 Years | 2 Years |
| Certification | |||
| Certification | NSF/ANSI 58 | NSF/ANSI 58 | NSF/ANSI 58 |
| Dimensions (inch) | |||
| Dimensions (inch) | 13.5L * 6W * 12H | 13.5L * 6W * 12H | 13.5L * 6W * 12H |
| Item Weight | |||
| Item Weight | 16 lbs | 16 lbs | 16.5 lbs |
FAQ
Discover helpful answers about the SimPure Q3-600 series under sink tankless RO system. Learn how it works, what it removes, and how to maintain it. This FAQ section covers installation tips, filter lifespan, flow rate, and direct-to-fridge connection details for your reverse osmosis system.
Contact UsThe SimPure Q3-600 offers the core high‑flow, low‑waste RO performance (600 GPD flow, 2:1 pure‑to‑drain ratio) but without the extra remineralizing or monitoring features of the A and U variants.
With a 600 GPD (gallons per day) high-flow RO membrane, the Q3-600A fills an 8-ounce glass in just 8 seconds. It’s ideal for busy households, offices, or even RVs — no waiting, just instant access to purified water anytime.
Filter lifespan depends on usage and water quality: CF Filter: Every 6–12 months RO Filter: Every 12–18 months Alkaline Filter: Every 6 months The system also includes a filter life reminder, and replacement filters can be swapped in just 3 seconds — no tools required.
Yes! All SimPure Q3-600 series under sink tankless RO supports a refrigerator/ice maker connection, giving you access to purified water for your beverages and ice.








