
GrowoniX EX400 - 400 GPD Reverse Osmosis Filtration System

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Is the GrowoniX EX400 400 GPD Reverse Osmosis Filtration System the Right Choice for You?
If you’re looking for a powerful, efficient, and long-lasting RO filtration system, the GrowoniX EX400 is a top-tier option. With a 400 GPD output, 2:1 waste ratio, and upgradeable performance with a booster pump, it’s ideal for both residential and commercial use. It delivers high flow, low waste, and unmatched durability in a compact design.
- Features & Benefits
- Product Specifications
- What is included?
- Warranty Policy
GrowoniX EX400 400 GPD Reverse Osmosis Filtration System
The GrowoniX EX400 is engineered for high performance and durability. It filters 17 gallons per hour with a 2:1 efficiency ratio, reducing water waste by 50% compared to traditional RO systems. Equipped with a high-flow membrane and membrane flush valve, it ensures long-term performance with minimal maintenance.

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Delivers excellent performance in cold water and supports up to 400 GPD
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Manual flush system helps extend membrane life by purging pollutants.
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Tracks pressure with precision, adding system monitoring and control.
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Includes tubing, adapters, and a wall bracket for fast installation.
Why Choose the GrowoniX EX400 400 GPD Reverse Osmosis Filtration System?
The EX400 is a high-capacity, water-saving RO system with unmatched flow rates and reliability. It comes pre-equipped with premium components and expandable options for serious growers and clean water seekers. Its membrane flushing, dual membrane setup, and rugged construction make it the smart choice for serious filtration needs.

Why GrowoniX?
Their products are designed to provide clean and safe water for various applications. With their advanced technology and durable construction, GrowoniX products offer superior performance and long-lasting durability. Choosing GrowoniX ensures that you are getting a trusted brand that prioritizes the quality and effectiveness of their products.

Why Buy From Us?
At GreenThumbDepot, you're not just another sale to a faceless corporation. You're partnering with a team genuinely invested in your success. Our legendary customer service, combined with a promise of unbeatable prices, sets us apart. We're here for you, always.
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Specifications
GrowoniX EX400 Reverse Osmosis System Specifications | |
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SKU | EX400-CONF |
Brand | GrowoniX |
Gallons Per Day | 400 |
Gallons Per Hour | 17 |
System Ratio Waste:Clean | 2:1 |
Operating Temperature | 40°F - 105°F |
Recommended Feed Pressure | 60 - 80 PSI |
Minimum Feed Pressure | 20 PSI |
Inlet Tubing Size | 3/8" |
Product Tubing Size | 1/4" |
Waste Tubing Size | 1/4" |
Height | 21" |
Width | 7" |
Length | 14" |
Nominal % Rejection | 98.5% |
Min. NaCl Rejection | 96% |
Max Water Hardness | 15 gpg |
Operating pH Range | 3 - 11 |
What’s in the Box?
GrowoniX EX400 Reverse Osmosis System includes:
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GrowoniX EX400 Reverse Osmosis System
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Dual High Flow Cold Water Membranes
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Spun Polypropylene Sediment Filter
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Green Coconut Carbon Filter
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Membrane Flush Kit
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EZ Hookup Kit with Tubing
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Garden Hose Adapter + Drain Saddle Clamp

Warranty Policy
Please check out the manufcaturers website for Warranty related issues.