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Flows 17 gallons per hour of pure RO water, with an astounding 2:1 ratio

Designed to flow 17 gallons per hour of pure RO water, with an astounding 2:1 ratio-High flow rates and water savings never before seen in a package so affordable and durable. Utilizing the most efficient membrane technology in the world, and equipped with a steel pressure gauge. A manual flush valve allows you to clean the membrane, purging out pollutants that could otherwise add buildup to the system. Flushing adds considerable life to the membrane as well.

Perhaps the coolest feature of the EX400 is that when used with a BP-1530 booster pump, to get the input feed water pressure to 80psi, the filter can produce up 450 gallons per day. No little RO on the planet can match this.

The GrowoniX EX400 Systems Feature:

  • High Flow Cold Water membrane
  • 2:1 system ratio - The most efficient in the industry
  • Electrogalvanized powder coated steel brackets
  • Membrane flush kit
  • 2.5" stainless steel liquid filled gauges
  • One Eco Green Coconut Carbon filter rated for 8,000 gallons chlorine/chloramine reduction
  • High Flow pleated sediment filter, completely washable and reusable
  • Auto Shutoff Valve: for positive automatic shutoff when using a float valve
  • No additional pre-filters needed
  • Carbon capacity—8,000 total gallons of chlorine or chloramine removal, or 3,000 gallons of RO water at a 2:1 ratio.
  • *Chloramine removal requires a KDF85 carbon fiber.

Optional Accessories for EX Series RO Systems

GrowoniX EX Series RO Systems Product Matrix

GrowoniX EX Series RO Filter Replacement Guide

Optional KDF85 Carbon Filter Upgrades

The KDF85/Catalytic Carbon Filter for chlorine and chloramine reduction.  A must for well water to reduce iron, hydrogen sulfide, and heavy metals and bacteria. The Bacteriostatic qualities do not allow microbes to breed in filter.

  • BP-1530 Booster Pump to raise the input feed-water pressure from zero to 80psi-even pumps water from a rain barrel through the system.
  • Float Valve (VA-F-1438) to allow for unaccompanied operation.


Filter SizeTall
System Ratio2:1
Nominal Salt Rejection %96%
Permeate Flow GPD400
Permeate Flow GPH17
Min Feed Flow GPM0.83
Max Feed Water TDS<2000
Max Feed Temp °F (°C)90 (32.2)
Min Feed Temp °F (°C)40 (4.44)
Max Ambient Temp °F (°C)115 (46.11)
Min Ambient Temp °F (°C)40 (4.44)
Max Feed Pressure psi80
Min Feed Pressure psi45
Max SDI Rating SDI<3
Max TDS ppm2000
Max Hardness gpg0
Max pH (Continuous)11
Min pH (Continuous)5
Max Turbidity NTU1
Feed Inch3/8" Tube
Permeate Inch1/4" Tube
Concentrate Inch1/4" Tube
Dimensions L x W x H inch14x7x29
  • Bulk Discounts

    Need Bulk quantities at bulk discount prices? Email us @ on any item! Including ones that are not in our online store at the moment!

$519.76 Regular Price
$457.39Sale Price
Excluding Sales Tax
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