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Continue ShoppingBRS 4 Stage Value 75GPD RODI System
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:
 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.
Stage 1
Purtrex 5 Micron Depth Sediment Filter ![]()
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 (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 Membrane (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.
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.
Need Replacement Filters? 4 Stage Chlorine/VOC Filter Kit
BRS RO/DI 4 Stage System Comparison | 
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| 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 
 | 
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| Sediment Filter | 
 Purtrex 5 Micron Depth Sediment Filter  
 | 
 Purtrex 5 Micron Depth Sediment Filter  
 | 
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| Carbon Block | 
 BRS VOC 5 Micron Carbon Block  
 | 
 BRS VOC 5 Micron Carbon Block   
 | 
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| Membrane | 
 75 or 100 GPD Dow Filmtec Membrane 
 | 
 75 or 100 GPD Dow Filmtec Membrane  | 
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| Deionization | 
Single Mixed Bed DI Stage with Refillable Cartridge | 
 Single Mixed Bed DI Stage with Refillable Cartridge  | 
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| Auto Shut Off Valve | 
 ✓ 
 | 
 ✓ 
 | 
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| Canister Wrench | 
 ✓ 
 | 
 ✓ 
 | 
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| Laundry Tub Connection Adapter | 
 ✓ 
 | 
 ✓ 
 | 
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| Chrome Faucet Diverter Valve | 
 ✓ 
 | 
 ✓ 
 | 
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| Glycerin Filled Pressure Gauge | 
 ✓  | 
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| Flush Kit | 
 ✓ 
 | 
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| Dual Inline TDS Meter | 
 ✓ 
 | 
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| Dimensions | 16" x 6.25" x 15.5" | 16" x 7" x 15.5" | ||||||
4 Stage Value RO/DI System Recommended Conditions:
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;
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