4 Stage 75GPD Value RO/DI System - Bulk Reef Supply

4 Stage 75GPD Value RO/DI System - Bulk Reef Supply
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  • 4 Stage 75GPD Value RO/DI System - Bulk Reef Supply
  • 4 Stage Value Parts Kit

4 Stage 75GPD Value RO/DI System - Bulk Reef Supply

100% Recommend this to a friend (2 of 2)

SKU: 210772
In Stock: 300
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Quick Overview

BRS 4 Stage Systems are perfect for reefers who have water treated with chlorine or relatively clean well water. The 4 stage systems are self-contained on a single bracket making them ideal for tight spaces or where a non-permanent connection may be required. Installing a RO/DI system only takes a few minutes and can be done very easily without any permanent modifications to your home or the plumbing.

4 Stage Value RO/DI Features:

  • Multiple source water connections

  • Mur-lok Push Connect dual EPDM O-Ring fittings

  • 10 Ft Each of 1/4" Blue, Red and Black Tubing

  • Pre-installed NSF Certified Filters NSF Certified


Full Details

BRS 4 Stage Value RO/DI System Instructions

Dow Filmtec Membrane BW60-1812-75


Lifetime Warranty All Bulk Reef Supply RO/DI Systems are covered by our Limited Lifetime Warranty.


Bulk Reef Supply RO/DI systems only use the latest filters and components in Reverse Osmosis technology. We have designed our RO/DI units especially for reef tanks, but they can produce perfect water for other types of saltwater and freshwater aquariums too. If you have a well, or you are connected to city water we provide a variety of RO/DI systems that will fit your aquarium's needs.


4 Stage RO/DI Systems - Perfect for city water that is treated with low amounts of chlorine, or well water with very minimal contaminants.
5 Stage RO/DI Systems - Our most popular system handles most types of well water along with most types of city water treated with chlorine including small amounts of chloramines.
6 Stage RO/DI Systems - If you are not sure what is in your water, or it contains excessive amounts of TDS or hard to remove contaminants like chloramines, phosphates, nitrates, silicates, etc. The BRS 6 Stage systems are designed to treat any water your home may have effectively. The Dual DI stage helps with the hard to remove ions like ammonia, phosphates, silicates, etc.


4 Stages of Filtration

Stage 1

Purtrex 5 Micron Depth Sediment Filter NSF Certified

Sediment filters trap debris and other free-floating particles that would normally clog expensive carbon blocks and foul membranes. Purtrex filters are a true depth filter with a graded density that progressively gets tighter through as water passes through the filter allowing them to last longer than the competitors.

Stage 2

BRS 5 Micron VOC Block NSF Certified (Chlorine 15,000 @ 1 GPM)

Our VOC carbon blocks are specially formulated to remove and reduce chlorine and volatile organic compounds from household water.

Stage 3

75 GPD Dow Filmtec MembraneNSF Certified (up to 99% rejection rate*)

DOW is hands down the industry leader for residential RO membranes. The 75 GPD Filmtec membrane can remove up to 99% of contaminants from traditional household drinking water. All membranes do require pressure to operate correctly, and DOW's membrane only requires 50 PSI of feed pressure to operate efficiently. For more info on DOW membranes - Click Here

Stage 4

Nuclear Grade Color-Changing Deionization Resin

Deionization resin is the final stage of the RODI system and will polish your water down to 0 TDS. The DI resin is a mixed bed with a color changing indicator to let you know when it is becoming depleted. The resin starts as a dark blue color that will turn gold when as it becomes exhausted and is a good indicator to let you know when to it should be replaced.
For more info on Color Changing DI Resin - Click Here


Need Replacement Filters? 4 Stage Chlorine/VOC Filter Kit


BRS RO/DI 4 Stage System Comparison

 BRS 4 Value RO/DI SystemsBRS 4 Plus RO/DI SystemsBRS 4 Plus Water Saver RO/DI Systems
Gallons Per Day
75 GPD
75 GPD
150 GPD
Sediment Filter
Purtrex 5 Micron Depth Sediment Filter 
Purtrex 5 Micron Depth Sediment Filter 
Purtrex 5 Micron Depth Sediment Filter 
Carbon Block
BRS VOC 5 Micron Carbon Block 
BRS VOC 5 Micron Carbon Block  
BRS VOC 5 Micron Carbon Block  
75 GPD Dow Filmtec Membrane

75 GPD Dow Filmtec Membrane

(2) 75 GPD Dow Filmtec Membranes

Single DI Stage with Refillable Cartridge

Single DI Stage with Refillable Cartridge

Single DI Stage with Refillable Cartridge

Auto Shut Off Valve
Canister Wrench
Laundry Tub Connection Adapter
Chrome Faucet Diverter Valve
Chlorine Test Strips  
Glycerin Filled Pressure Gauge  

Flush Kit  
Dual Inline TDS Meter  
Ball Valve  
Drain Saddle Clamp  
EZ Angle Stop Adapter  
Self-Piercing Saddle Valve  
Float Valve    
150 GPD Water Saver Upgrade Kit    
Dimensions 16" x 6.25" x 15.5" 16" x 7" x 15.5" 16" x 7" x 18"


4 Stage Value RO/DI System Recommended Conditions:

  • Minimum Water Pressure - 50 PSI
  • Max Water Pressure - 90 PSI
  • Recommended Water Temperature - 77°F
  • Recommended Max TDS - <300ppm

Water pressure can be increased by adding a booster pump before your RO/DI system if a pressure increase is required. Low pressure will cause slow production of product water, with excess production of waste water. Pressure over 90 PSI may cause damage to the RO/DI units filters and components.


*DOW Filmtec 75 GPD Membranes have a 96% - 99% typical stabilized salt rejection rate that can be reproduced through the following conditions;

  • Source Water Pressure - 50 PSI / Membrane
  • Source Water Temperature - 77°F
  • Source Water TDS - 250ppm Softened Tap Water
  • Recovery - 15%
  • Minimum Salt Rejection - 96%

For more info on DOW Filmtec BW60-1812-75 Membrane - Click Here


2 Items

  • Affordable Unit that quickly pays for itself By Mike on 9/1/2017

    This is a great entry level RODI unit. It comes with easy to follow instructions and several adapters that can be used to connect the unit to a number of different water sources such as sinks and outdoor faucets. I ultimately decided to mount this unit above my washing machine. Using a Y adapter (not included in this kit), I am pulling water from the cold water source for my washing machine. I am also using the washing machine drain (not the washing machine itself but the receptacle that it drains into) for the wastewater. Finally, the filtered water is deposited into a 35 gallon Brute garbage can.

    The only extra parts I needed for this setup was the Y adapter for the washing machine water and 2 drywall anchors to mount the unit to the wall. I used “zip anchors” for this and they hold the unit tightly to the wall. These anchors are available at either of the blue or orange big box stores for a couple bucks.

    A couple miscellaneous notes about this RODI system... Mine produces just over 100 gallons a day as opposed to the advertised 75 gallons per day. The easy mounting of this unit keeps it out of the way in my laundry room which makes the wife very happy. While this unit will take a while to pay for itself fiscally, I no longer have to lug heavy buckets of water back from my LFS and that is priceless! Along that same line of thought, the fewer trips that I make to my LFS specificly for water, the fewer impulse buys I make while there which indirectly helps this unit pay for itself. Finally, I would be negligent if I did not mention the very fast and free shipping from BRS. Thanks guys!
  • Should've got this sooner By Kenny on 7/13/2017

    Awesome value by BRS. The unit I got came with the TDS meter and pressure gauge. I should've bought this years ago when I started my first reef tank. Super easy set up and saves a lot of trips to the fish store.


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