Bulk Reef Supply

4 Stage Value Plus 150GPD Water Saver RO/DI System

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$329.99 $329.99

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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 Plus Water Saver RO/DI Features: Produce 150 GPD of product water without any more waste water than a 75 GPD membrane would produce.

  • Dual TDS Meter
  • Glycerin Filled Pressure Gauge
  • Pre-installed Automatic shut-off valve
  • Pre-installed Flush Kit
  • Multiple source water connections
  • Drain/waste 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


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 an actual 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

Dual 75 GPD Dow Filmtec Membranes NSF 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 can 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 start looking at your TDS meter.
For more info on Color Changing DI Resin - Click Here


Need Replacement Filters? Click Here


BRS RO/DI 4 Stage System Comparison

  BRS 4 Value RO/DI Systems BRS 4 Value Plus RO/DI Systems
Gallons Per Day
75, 100, 150, or 200
75, 100, 150, or 200
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  
75 or 100 GPD Dow Filmtec Membrane

75 or 100 GPD Dow Filmtec Membrane

Single Mixed Bed DI Stage with Refillable Cartridge

Single Mixed Bed DI Stage with Refillable Cartridge

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

Flush Kit  
Dual Inline TDS Meter  
Dimensions 16" x 6.25" x 15.5" 16" x 7" x 15.5"


4 Stage Plus Water Saver RO/DI System Recommended Conditions:

  • Minimum Water Pressure - 65 PSI
  • Max Water Pressure - 90 PSI
  • Recommended Water Temperature - 77°F
  • Recommended Max TDS - <200ppm

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%


pdf BRS 4 Stage Plus Water Saver RO/DI Owners Manual

pdf Dow Filmtec Membrane BW60-1812-75

More Information
UPC 853710007759

pdf BRS 4 Stage Plus Water Saver RO/DI Owners Manual

pdf Dow Filmtec Membrane BW60-1812-75

Stages 4 Stage
Production Rate 150 Gallons per Day
Waste:Product Water Water Saver (1.5:1)
Dimensions 16" x 7" x 15.5"
Filter Dimensions 10 in. x 2.5 in. (Standard)
Tubing Length 10 Ft Each of 1/4" Blue, Red and Black Tubing
Included Filters Sediment Filter, Carbon Block, RO Membrane, 2nd RO Mebrane, DI Resin (Mixed Bed)
Included Accessories Flush Kit, Pressure Gauge, TDS Meter, Faucet & Garden Hose Connections
Warranty BRS Limited Lifetime Warranty
Water Supply Connections Faucet Diverter Valves, Garden Hose / Laundry Tub
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Product Questions

This 4 stage rodi remove phospate or I need add another filter or definitely I have to buy the 6 stage
Question by: Rodrigo on Jun 26, 2024, 6:36 AM
All of our RO/DI system will get rid of phosphate. The RO membrane and DI resin will be the main filters to get rid of it, depending on how high they are to start with, you may need to add additional DI canisters. I would recommend starting with the 5 stage.
Answer by: Grace (BRS Staff) on Jun 27, 2024, 11:38 AM
I have the 4 stage Value plus water saver 150 GPD and my question is it the same filter that goes into both PCV looking filters?
Question by: Matthew Denney on Mar 3, 2024, 10:23 AM
Hey there,
Thank you for reaching out to us. The PVC filters your talking about are on the top of the RODI system and are called the membrane filters. They are both the same filter. Each one is is a 75 GPD Dow Filmtec Membrane filter. This is what makes your system a 150 GPD. Please let me know if you need anything further.

Answer by: Thomas Wofle (BRS Staff) on Mar 11, 2024, 9:59 AM
Is there a way to set this up to a water faucet as I can’t do any kind of Plumbing as I live in an apartment.
Question by: Kevin on Dec 4, 2017, 4:45 PM
Hi There,
The water saver system ships with the Faucet diverter valve that you can attach to a standard faucet. You may need to gave an adapter kit depending on your faucet:
The valve does work with most common faucets. You would then just direct the waste line down the drain.
If you have any other questions please let us know!
Answer by: William Glenn on Dec 5, 2017, 12:44 PM
Which replacement filter should I buy for this system?
Question by: ROSSANNA ROSAS on Nov 3, 2017, 8:09 PM
Hi Rossanna, thanks for reaching out.
Any of our 4 stage RO/DI replacement kits will work on this unit. I would recommend the first kit linked below for the best performance.
Answer by: Nick on Nov 25, 2017, 2:07 PM
Can I use this 4 stage RO/DI filter system to filter my drinking water?
Question by: Lori on May 16, 2017, 2:58 PM
Our Plus systems are not really intended for use in producing drinking water. The TDS meters, pressure gauges, and flush valves do not have NSF certification. Additionally, it's not recommended to use DI filtered water for drinking purposes, so you would want to bypass any DI filtration you may have when producing drinking water.

We do offer a RO/Drinking water systems here:

Have a great day!
Answer by: Zack on May 18, 2017, 3:33 PM
Would you please help me this. Can RO/DI system use softwater make RO/DI water for reef tank
Question by: Hung Nguyen on May 14, 2017, 12:08 PM
Hey there,
The RODI system will work great with your softened water!

Have a great day!
Answer by: Zack on May 17, 2017, 12:07 PM