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GrowoniX EX400 - 400 GPD Reverse Osmosis Filtration System

GrowoniX EX400 - 400 GPD Reverse Osmosis Filtration System

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SKU: EX400-CONF-STND

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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.

  • Delivers excellent performance in cold water and supports up to 400 GPD 
  • Manual flush system helps extend membrane life by purging pollutants.
  • Tracks pressure with precision, adding system monitoring and control.
  • 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.

FAQ Section

How many gallons per day does the EX400 produce?
The GrowoniX EX400 produces 400 gallons of pure water per day under optimal conditions, and up to 450 GPD when used with a booster pump.
What is the benefit of the manual membrane flush valve?
The manual flush valve allows you to purge out contaminants from the membrane, significantly extending its lifespan and maintaining flow efficiency.
Can I upgrade the carbon filters?
Yes, you can upgrade to KDF85/Catalytic Carbon filters, which are great for removing chloramines, iron, sulfur, and heavy metals—ideal for both city and well water.
Is the EX400 wall mountable?
Yes, the system includes wall-mounting brackets for convenient vertical installation and space efficiency.
What is the minimum water pressure required for the EX400?
The EX400 requires a minimum feed pressure of 20 PSI but performs best with 60–80 PSI. A booster pump can be used to increase performance.
Does it come with all necessary tubing and connectors?
Yes, it includes inlet, product, and waste tubing, along with a garden hose adapter and drain saddle clamp for easy setup.
What maintenance is required for optimal performance?
Regular filter changes (every 6 months for sediment/carbon, 1–2 years for membranes), and using the flush valve weekly to clean the membrane will ensure optimal performance.
Is there a warranty for this product?
Please check the warranty tab on this page for warranty information.
How long will shipping take?
Please check our shipping policy here for shipping information.
What is the return policy?
Please check our return policy here for return policy information.

Specifications

GrowoniX EX400 Reverse Osmosis System Specifications
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:

  • GrowoniX EX400 Reverse Osmosis System
  • Dual High Flow Cold Water Membranes
  • Spun Polypropylene Sediment Filter
  • Green Coconut Carbon Filter
  • Membrane Flush Kit
  • EZ Hookup Kit with Tubing
  • Garden Hose Adapter + Drain Saddle Clamp

Warranty Policy

Please check out the manufcaturers website for Warranty related issues.

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