US Water Systems Defender Commercial Floor-Mount Reverse Osmosis System – 2000 to 16000 GPD

List Price $10,917.27 Factory Direct Price $7,278.18 Sale Price $6,065.15
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The Defender is a customizable commercial RO System that was designed to be durable, sustainable, economical, and eco-friendly. It is built in the USA specifically with commercial and industrial applications in mind. This system ranks high in dependability and is easy to service and maintain thanks to the highest quality of parts and components such as stainless steel housings, industrial pumps, and reinforced fittings. It was designed for a wide range of flow requirements for various industries such as:

Hydroponics, Brewing, Distilling, Food Service, Pulp and Paper, Pharmaceutical Manufacturing, Textile Manufacturing, and Hospitality

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Designed to be sustainable, economical, and eco-friendly, the Defender Commercial RO System is a commercial-grade RO system that is built upon our principles of reliability and dependability. US Water Systems proudly manufactures this system here, in the USA. It features 300 series stainless steel for both its membrane housings and pump, giving it 3 times the longevity when compared to systems sold by competitors. It was designed for, and has functioned in the following industries:

  • Hydroponics
  • Brewing
  • Distilling
  • Pulp and Paper
  • Pharmaceutical Manufacturing
  • Textile Manufacturing
  • Food Processing
  • And more...

Proper Pretreatment IS Essential

A reverse osmosis system with proper pre-treatment will last 15-20 years, while one without proper pre-treatment may be ruined in a few months. Our Defender RO System is a Plug & Play, Turnkey System for all water supplies, it has two standard pretreatment options but can be customized. Call us for more details - (800) 608-8792

BodyGuard Plus Whole House Water Filtration System

Made for heavy-duty commercial applications, the Bodyguard High-Flow Chemical Removal Filter is designed to provide the highest performance at the lowest maintenance cost. This filter uses premium Coconut Shell Granular Activated Carbon and Catalytic Carbon rated at 5 years or 1,000,000 gallons to remove chlorine, chloramine, and a plethora of chemicals and pesticides

Key Features

  • Reduces or removes chlorine, chloramine, chemicals, and pesticides
  • Eliminates tastes and odors
  • Delivers softer skin and hair by eliminating the chemical irritants
  • Uses no electricity
  • No wasted water
  • Uses all NSF and WQA Certified Components
  • Easy installation - just two connections
  • Highly durable commercial grade system
  • Carbon lasts 5 years or up to 1,000,000 gallons
  • 10 Year Parts Warranty

US Water Anti-Scalant Injection System

Featuring the Classic Series metering pumps which are self-priming and the 3-point roller assembly provides a positive 2-point seal on the pump tube at all times. This eliminates the need for anti-siphoning valves and diaphragms. The patented mechanical feed rate control (adjustable models) allows the pump's output to be scaled from 5% to 100% with the simple turn of the dial.

Key Features

  • Peristaltic Design - self-priming, can run dry without damage
  • Chemicals are metered without exposure to air
  • Pumps gaseous solutions
  • Accepts a variety of chemicals - refer to chemical compatibility guide
  • All housings manufactured from Lexan Polycarbonate Plastic
  • Manufactured in the USA since 1957

Need A Custom System?

At US Water Systems we realize that effective water treatment isn't done using a one size fits all approach. That why we have a team of Water Treatment Specialists that can assist you in building a custom system to address your particular water problems. 

Permeate Flush

Permeate flush is an option for our RO systems that can provide a membrane flush directly after shutdown. This flush option is called Permeate Flush because it uses clean water produced by the RO system (permeate or product water) to flush the membranes after shutdown. This is extremely effective when membrane life is going to be a problem. In cases where the dissolved solids of the feed water are elevated this is crucial to membrane life. This may not always be the total dissolved solids (TDS).

In some cases, one particular element such as silica is elevated, and permeate flush is used to make sure it is flushed from the membrane after shutdown. If concentrated solids are left in the membrane housings after shutdown they can precipitate (fall out) from the solution. When this happens the solids remain in the membrane housings until the RO system starts up again. This causes them to be pushed into the membrane instead of flushed as they would be during operation. The membranes eventually become clogged with these solids reducing the lifespan.

Key Features

A Green Solution

  • Our Defender RO is up to 80% efficient which means that it wastes only 1 gallon for every 5 gallons it makes.

Commercial Pump And Motor

  • At the heart of this system is a True Commercial Centrifugal Pump. Rotary Vane and Diaphragm Pumps offer no longevity, in fact, they frequently have to be replaced every 6 months or so.


  • Flow Meters and pressure gauges with 316 stainless steel needle valves for precise control of production and wastewater

5 Micron Magna Pre-Filter

  • With 36 Square Feet of Media for long life

Stainless Steel Membrane Housing

  • These housings provide the best longevity with ease of replacement

Highest Rejection Rates

  • Up to 99% rejection

Defender Controller With TDS Meter

  • Enables you to continuously monitor water quality

Best Warranty In The Business

  • Two years on the system (does not include consumables such as membranes and filters)

A Heavy Duty Pump That Lasts

Diaphram Pump

Light duty pump for intermittent applications. Commonly used for under-sink RO applications.

Rotary Vane Pump

Standard pump for residential RO applications where continuous operation is not needed.

Multi-Stage Centrifugal Pump

Heavy-duty, stainless steel commercial grade pump engineered for continuous operation over a long period of time.


ConfigurationSingle PassSingle PassSingle PassSingle PassSingle PassSingle Pass
Feed Water SourceCity or Well WaterCity or Well WaterCity or Well WaterCity or Well WaterCity or Well WaterCity or Well Water
Standard Recovery Rate30%48%53%62%62%67%
Recovery with Concentrate RecycleUp to 80%
Vessel Array11:11:1:11:1:1:12:2:22:2:2:2
Vessel Quantity123468
Rejection and Flow RatesDFROM-2000DFROM-4000DFROM-6000DFROM-8000DFROM-12000DFROM-16000
Nominal Salt Rejection %98.598.598.598.598.598.5
Permeate Flow* gpm (lpm)1.38 (5.22)2.78 (10.52)4.16 (15.80)5.56 (21.13)8.33 (31.67)11.1 (42.22)
Minimum Feed Flow gpm (lpm)2.35 (8.89)7.00 (26.50)7.16 (27.20)8.56 (32.53)15.56 (59.13)17.1 (64.98)
Maximum Feed Flow gpm (lpm)6.00 (22.70)9.00 (34.07)14.00 (53.00)14.00 (53.00)18.00 (68.4)20.00 (76.00)
Minimum Concentrate Flow gpm (lpm)3.00 (11.36)3.00 (11.36)3.00 (11.36)3.00 (11.36)6.00 (22.8)6.00 (22.8)
Pump TypeMulti-StageMulti-StageMulti-StageMulti-StageMulti-StageMulti-Stage
Motor HP (kw)1.5 (1.10)1.5 (1.10)1.5 (1.10)1.5 (1.10)3.0 (2.24)3.0 (2.24)
RPM @ 60 (50Hz)3450 (2900)
Feed inch1" FNPT
Permeate Inch1/2" Tubing
Concentrate Inch1/2" Tubing
Voltage220V 60Hz 1PH ONLY
Voltage Amp Draw8.3
Membrane Per Vessel111111
Membrane Quantity123468
Membrane Size4" x 40" (4040)4" x 40" (4040)4" x 40" (4040)4" x 40" (4040)4" x 40" (4040)4" x 40" (4040)
System Dimensions**DFROM-2000DFROM-4000DFROM-6000DFROM-8000DFROM-12000DFROM-16000
L x W x H inch (cm)25" x 25" x 60" (63.5 x 63.5 x 152.4)34" x 25" x 60" (86.36 x 63.5 x 152.4)
Weight lb. (kg)384404424444526546
Operating Limits
Maximum Feed Temperature °F (°C)105 (40.96)
Minimum Feed Temperature °F (°C)40 (4.44)
Maximum Ambient Temperature °F (°C)120 (48.89)
Minimum Ambient Temperature °F (°C)35 (1.66)
Maximum Feed Pressure psi (bar)85 (5.86)
Minimum Feed Pressure psi (bar)35 (2.41)
Maximum Operating Pressure psi (bar)150 (10.34)
Maximum SDI Rating< 3
Maximum Turbidity NTU1
Maximum Free Chlorine ppm0
Maximum TDS ppm2000
Maximum Hardness gpg< 1
Maximum pH (Continuous)11
Minimum pH (Continuous)3
Maximum pH (Cleaning 30 Min)12
Minimum pH (Cleaning 30 Min)2
* Product flow rates are based on equipment test parameters.
** Does not include operating space requirements.


The water industry uses the RO System Production Rating as a standard and it is best suited for “perfect water conditions”, which is rare in any case. An ideal condition is specified as “water less than 2000 ppm TDS (Total Dissolved Solids) with a temperature of 77 degrees F”. If your TDS is dramatically higher or your temperature is dramatically lower, the system production will be greatly impacted.


If your TDS is above 2,000 ppm, or you are in a region where your water temperature is lower or higher than 77 degrees F you should consult with one of our Certified Water Specialists before selecting a system. In certain cases, a pretreatment application may be necessary to achieve your water treatment goals.

additional information

WarrantyLifetime on Anti-Scalant 2 Years on RO System Components (excludes consumables) Pre-Treatment is covered by individual equipment warranty
American MadeYes
ManufacturerUS Water Systems
More Information