GrowoniX GX150-HR - 150 GPD Reverse Osmosis Filtration System

GrowoniX GX150-HR - 150 GPD Reverse Osmosis Filtration System

GrowoniX Brand Product
$264.17 - $270.06

Lead time: Please select an option below


Water Filtration through Reverse Osmosis

The GX series is the top of the line Reverse Osmosis filter offered by Growonix. Offered in various sizes and flow rates, these units include the highest quality components available and provide the lowest waste water ratio available.

The GX150-HR with a single GrowoniX Ultra High Rejection membrane out-performs all other systems in the same class that utilize two membranes. When we developed the GX150-HR, we decided to pack all the high end features into a tight efficient RO unit. We engineered a 50% increase in water production over traditional RO systems, lowered the waste ratio to 2:1, and still offered it to you for the same price point of an entry level RO filter. We topped it all off with a 2 stainless steel liquid-filled pressure gauge, never before seen in a filter this size, and integrated it into our patented GX Series bracketing system. A manual flush valve allows you to clean the membrane, purging out pollutants that could otherwise add buildup to the system.

The strategy behind the GX Series is simple; build the highest quality, most efficient water filter, tuned specifically to meet the rigors of the industry. Each filter system is designed, hand-built, and tested right here in the United States, using American made, top-of-the-line fittings and tubing.

The GX 150 uses the High Rejection Membrane . Ultra High Rejection membrane for the purest of water, a little less flow. 150 GPD.

The next step up would be the GX 200 Reverse Osmosis System . which uses the High Flow Membrane . High Flow Membrane for superior water production, a bit more TDS. 200 GPD

Features of the GX150-HR

  • 150 Gallons per day
  • 6.25 Gallons per hour
  • Ultra High Rejection membrane element
  • 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 16,000 gallons for chlorine reduction.
  • Chloramine removal requires KDF85/CAT carbon filter
  • High Flow pleated sediment filter, completely wash-able and reusable
  • Auto Shutoff Valve: for positive automatic shutoff when using a float valve
  • No additional pre-filters needed!
GrowoniX GX150 Diagram

KDF/Catalytic Carbon

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. This upgrade also prolongs the membrane elements from the harmful effects of feed water.

GrowoniX 150 Component Diagram

  1. Patented GX mounting bracket
  2. Sediment filter
  3. Carbon filter
  4. RO membrane
  5. Pressure gauge
  6. Supply water in
  7. RO water out
  8. Waste/drain tubing
  9. Flow restrictor
  10. Membrane Flush Valve
  11. Auto shutoff valve
  12. Drain saddle clamp
  13. In line shutoff valve
  14. Filter wrench
  15. Supply, RO, and drain tubing
  16. Garden hose adapter
GrowoniX GX150 Parts

Replacement & Upgraded Filters for GX150

*This filter is included. All other filters are available as substitutions and upgrades.

Carbon Filters

Green Coconut Carbon


Green Coconut Carbon Block. NFS61 listed carbon filter manufactured with a patented process that greatly reduces greenhouse emissions—High flow with a low carbon footprint and superior chlorine removal.

White Coconut Carbon


White Coconut Carbon Block. Ultra high purity coconut shell activated carbon filter. Superior chemical absorption and turbidity reduction. The unbeatable cost of performance value.

KDF85/Catalytic Carbon Filter


KDF85/Catalytic Carbon Filter. KDF85 Bacteriostatic media controls the growth of microorganisms. Good for water-soluble metals removal, chlorine, chloramine, and scale. Highly reactive catalytic carbon, extremely porous and long-lasting. Absolutely the best carbon filter available, a must for well water treatment, and the best option for removal of CHLORAMINE! Needs flushing upon initial startup and after filter changes to remove carbon fines and dust.

Sediment Filters

High flow pleated sediment filter


High flow pleated sediment filter: This is a washable, reusable, and durable sediment filter with a very low-pressure drop. Bacteria and chemical resistant. Great for high flow applications and extended time between filter changes.

Spun polypropylene


Spun polypropylene - A true multi-staged depth filter utilizing separate layers of micron filtration. Constructed spun polypropylene, these filters offer superior dirt holding capacity at an extremely economical price. They have more pressure drop than pleated filters. Great filter for changing frequently, especially in well water applications, or any situation where feed water is loaded with sediment.

Membrane Elements

High Rejection Membrane element


High Rejection Membrane element. More rejection than high flow membranes, but with less flow rate. Great for ultra pure drinking water.

High Flow Cold Water Membrane element


High Flow Cold Water Membrane element. Less rejection than high rejection membranes, but with a much higher flow rate. Superior flow in cold water conditions as well. Our most popular membrane element.

UV Water Filter

Stainless steel ultraviolet filtration


Stainless steel ultraviolet filtration to remove 99.9% of micro-organisms in your water supply. A must for well water treatment, whole house filter systems, or any time water will be stored. Flow rate of 1 GPM


GrowoniX GX150-HR - 150 GPD Reverse Osmosis Filtration System Videos

Product Q&A

GrowoniX GX150-HR - 150 GPD Reverse Osmosis Filtration System Questions & Answers


How does water temperature effect flow rates through RO filters?
Between 77° and 50° water system production declines by 50%, as cold water is more dense, more viscous, and more difficult to move through the membranes.

What can be done to combat the effects of cold water on RO membranes?
Increasing the water pressure with a booster pump. Increasing the feed water temperature, which some people do by mixing warm and cold water from a diverter valve.


Does the system ratio (waste ratio) change over time?
System ratios can change over time if the flow restrictor starts clogging due to hard feed water conditions.

Does the system ratio change with water temperature?
System ratios (waste ratios) can drift with cold feed water. Water travels the path of least resistance — the drain line! It’s important to check the system ratio during the winter months and adjust if necessary.

How can the system ratio be adjusted?
System ratios can be tuned with a ball valve or Flow Box. Never go lower than the system was intended for.


How much water pressure is needed to run an RO system properly?
RO membranes require 40 psi of incoming pressure to produce even a drop of water except our GXM200-HF which requires only 20PSI. The only membrane on the planet that can do this.

What’s the maximum feed water pressure that an RO system should run on?
Incoming feed water pressure on all water filters, always and everywhere, should be no more than 80psi. Plastic filter housings cannot handle more pressure.


Can all GrowoniX water filters be used with well water?
Well water is generally too dirty for small RO membranes (100GPD through 400GPD systems). The large 4” membranes of the bigger systems (600GPD and larger) are recommended for well water treatment, unless the water demand is really low.

Are there any special filters needed to treat well water?
KDF85/ catalytic carbon filters are a must for well water treatment. This premium catalytic carbon filter with a bed of KDF85 media can reduce iron, hydrogen sulfide, heavy metals, and bacteria—all things that wreak havoc on RO components—especially membranes. Other consideration for special filters can only be deduced with a laboratory water analysis.

Does GrowoniX help with well water analysis?
They do. Just send Growonix your water analysis and they will look at it for free. If you don’t have a recent analysis, you can either use a local water lab, or purchase a test kit through GrowoniX send it off to our partner lab.


GrowoniX GX150-HR - 150 GPD Reverse Osmosis Filtration System Reviews

Excellent, efficient little unit
I routinely get 10-20 ppm water out of this unit (starting with 200-350 ppm city water), which makes my rain-forest, higher-elevation orchids very happy. Its production rate and efficiency meet specifications. Last winter I added a booster pump since when incoming water is cold production does diminish, and that worked very well.

Tech Specs