400 GPD Commercial 5-Stage Reverse Osmosis Water Filtration System with Dual Booster Pumps
Produce high-quality reverse osmosis water for commercial, office, restaurant, food-service, aquarium, and other higher-demand applications with the Max Water 400 GPD Commercial Reverse Osmosis System.
This five-stage system combines sediment filtration, two carbon pretreatment stages, dual 200 GPD thin-film composite membranes, and a final polishing carbon filter. Dual booster pumps help provide the operating pressure required for consistent membrane performance under suitable feed-water conditions.
The system is designed to reduce total dissolved solids and a broad range of dissolved impurities from biologically safe feed water. Actual production and rejection performance depend on water temperature, pressure, TDS, hardness, membrane condition, and pretreatment quality.
Key Features and Benefits
- 400 GPD nominal production: Dual 200 GPD membranes provide higher output than standard residential RO systems.
- Dual booster pumps: Help provide operating pressure for both membrane channels under suitable feed-water conditions.
- Five treatment stages: Combines sediment, GAC, CTO, reverse osmosis, and final polishing carbon filtration.
- Minimum stated TDS rejection: Approximately 95% under suitable operating conditions.
- Automatic controls: Includes high-pressure switch, low-pressure switch, and solenoid valve.
- Commercial-size prefilters: Uses 20" x 2.5" sediment and carbon cartridges for increased pretreatment capacity.
- Complete membrane package: Both RO membranes and all listed filter cartridges are included.
- Flexible installation: Includes tubing, feed-water adapters, delivery valve, and filter wrench.
Five Stages of Reverse Osmosis Filtration
-
5-Micron Sediment Prefilter — 20" x 2.5"
Captures silt, rust, algae, dirt, cloudiness, and other suspended particles before they reach the carbon filters, pumps, and RO membranes. Typical replacement interval: approximately every 2–8 months. -
Granular Activated Carbon Prefilter — 20" x 2.5"
Coconut-shell GAC helps reduce chlorine, unpleasant taste, odor, pesticides, herbicides, and selected organic compounds before the water reaches the membranes. Typical replacement interval: approximately every 2–6 months. -
CTO Coconut-Shell Carbon Block Prefilter — 20" x 2.5"
Provides additional chlorine, taste, and odor reduction while helping protect the chlorine-sensitive thin-film composite RO membranes. Typical replacement interval: approximately every 2–6 months. -
Dual 200 GPD TFC Reverse Osmosis Membranes
Two thin-film composite membranes provide a combined nominal production capacity of up to 400 gallons per day. The membrane stage reduces total dissolved solids and a broad range of dissolved organic and inorganic impurities. Typical replacement interval: approximately every 2 years, depending on feed-water quality and operating conditions. -
Inline GAC Polishing Postfilter
Provides final taste and odor polishing before the treated water reaches the storage or delivery point. Typical replacement interval: approximately every 2–8 months.
Technical Specifications
| Specification | Value |
|---|---|
| System Type | Five-stage commercial reverse osmosis system |
| Nominal Production Capacity | Up to 400 gallons per day* |
| RO Membranes | Two 2012-size 200 GPD TFC membranes |
| Stated Minimum TDS Rejection | Approximately 95%* |
| Booster Pumps | Dual booster-pump configuration |
| Prefilter Size | 20" x 2.5" |
| Operating Feed Pressure | 10–75 PSI |
| Operating Water Temperature | 40–104°F / up to 40°C |
| Maximum Recommended Feed-Water TDS | 1,000 ppm |
| Approximate System Dimensions | 17.5" L x 11" W x 33.5" H |
| Approximate System Weight | 55 lb. |
| Approximate Packaged Weight | 58 lb. |
| Feed-Water Requirement | Biologically safe water supply |
*Actual production and rejection depend on feed-water pressure, temperature, TDS, hardness, membrane condition, recovery ratio, pump performance, pretreatment quality, and backpressure. Ratings are not guaranteed under all field conditions.
Package Includes
- Two booster pumps
- Two 200 GPD TFC reverse osmosis membranes
- One 5-micron 20" sediment prefilter
- One 20" GAC carbon prefilter
- One 20" CTO carbon block prefilter
- One inline GAC polishing postfilter
- High-pressure switch
- Low-pressure switch
- Solenoid valve
- Ten feet of 3/8" polyethylene tubing and sixteen feet of 1/4" tubing
- 1/2" feed-water adapter included with booster-pump package, Part No. 105142
- 3/8" feed-water adapter valve, Part No. 105156
- 1/4" x 1/4" RO delivery valve, Part No. 105120
- Filter-housing wrench
- All listed filters and membranes
- Installation components and instructions supplied with the system
Recommended Applications
- Restaurants, cafés, and food-service water preparation
- Office drinking-water production
- Commercial beverage and ice-machine feed water
- Aquarium and hydroponic water preparation
- Window-cleaning and detailing water preparation
- Small commercial process-water applications
- Laboratory and technical rinse-water preparation
- Storage-tank filling and controlled water-production systems
Feed-Water Pretreatment Requirements
Water containing hydrogen sulfide, rotten-egg odor, elevated iron, sulfur, manganese, or sulfur-reducing bacteria should be properly treated before it reaches the RO system.
Without adequate pretreatment, these contaminants may cause membrane fouling, slime formation, mineral buildup, unpleasant odor, and reduced production. Hydrogen sulfide may also oxidize into sulfur particles that can clog filters and membrane surfaces.
Reverse osmosis membranes are not intended as the primary treatment for hydrogen sulfide odor. Install suitable iron, sulfur, manganese, or disinfection equipment ahead of the RO system when testing shows that these conditions are present.
The supplied product information limits feed-water TDS to approximately 1,000 ppm. If the source water exceeds this level, or if hardness is high, install properly sized pretreatment before the RO system.
A water softener and compatible antiscalant treatment may help minimize scale formation, improve membrane efficiency, reduce cleaning frequency, and extend membrane service life.
Liquid-Level Control Recommendation
To reduce frequent pump cycling and help protect the dual booster pumps, consider using the commercial liquid-level control switch, Part No. 105050 .
This type of level control can be used with a compatible storage-tank installation to provide more reliable pump control than basic on-and-off float-valve arrangements. The final control method must be selected and wired according to the pump, tank, and installation design.
Installation and Maintenance Information
- Test the source water for TDS, hardness, iron, manganese, sulfur, chlorine, pH, and microbiological quality before installation.
- Install suitable pretreatment before the RO system whenever source-water conditions exceed the system requirements.
- Connect the feed-water, product-water, and drain tubing according to the supplied flow diagram.
- Do not operate the booster pumps without adequate incoming water supply. The low-pressure switch should be installed and tested correctly.
- Install the high-pressure switch and solenoid valve according to the supplied electrical and hydraulic instructions.
- Flush all new prefilters, postfilter, and RO membranes before using the product water.
- Replace sediment and carbon prefilters before chlorine or heavy sediment reaches the RO membranes.
- Monitor product-water TDS regularly with a calibrated TDS meter.
- Sanitize the housings, tubing, storage tank, and product-water pathway during scheduled maintenance.
- Check fittings, tubing, pump operation, switches, and the drain flow regularly for leakage or abnormal operation.
Frequently Asked Questions
Does this system always produce exactly 400 gallons per day?
No. The 400 GPD figure is a nominal membrane rating. Actual production decreases when feed-water temperature or pressure is low and may also be affected by high TDS, hardness, scaling, backpressure, membrane age, and pretreatment condition.
Why does the system use two booster pumps?
The dual-pump configuration supports the two 200 GPD membrane channels and helps provide operating pressure for higher-capacity production. Adequate feed-water supply and correct electrical control are still required.
Why are there two carbon prefilters?
The GAC filter provides initial chlorine, taste, odor, and organic reduction. The CTO carbon block provides an additional chlorine-removal and polishing stage before the water reaches the chlorine-sensitive TFC membranes.
Can this system be connected directly to a large storage tank?
Yes, when the storage tank, shutoff controls, pressure switches, tubing, and delivery components are properly sized. A compatible liquid-level control is recommended to reduce rapid pump cycling.
Is this a conventional whole-house system?
No. It is a commercial RO water-production system rated by gallons per day. It is best used to fill a storage tank or supply controlled product-water applications rather than directly serving unrestricted whole-house peak flow.
Can it be used on well water?
It may be used with properly tested and pretreated well water. Iron, manganese, sulfur, hydrogen sulfide, hardness, sediment, and bacteria must be treated before the RO system when present at problematic levels.
Does reverse osmosis remove rotten-egg odor?
It should not be used as the primary hydrogen-sulfide treatment method. Rotten-egg odor and sulfur contamination should be treated ahead of the RO unit to protect the filters, pumps, and membranes.
How often should the prefilters be replaced?
The supplied guidance lists approximately 2–8 months for the sediment and post-carbon filters and approximately 2–6 months for the GAC and CTO prefilters. Actual intervals depend on sediment, chlorine, water use, and operating hours.
How do I know when the RO membranes need replacement?
Compare feed-water TDS with product-water TDS using a calibrated meter. A sustained decline in rejection, reduced production after correcting pressure and temperature issues, or membrane fouling may indicate that replacement is required.
Why is a water softener recommended for hard water?
Calcium and magnesium can form scale on the membrane surface. Proper softening and antiscalant treatment can reduce scaling, improve production, and help extend membrane life.
Does the system include a storage tank?
A storage tank is not listed among the included components in the supplied product information. Select a compatible atmospheric or pressurized storage solution based on the intended application and control method.
TDS = Total Dissolved Solids. GPD = Gallons Per Day. GAC = Granular Activated Carbon. CTO = Chlorine, Taste, and Odor. TFC = Thin-Film Composite.
Filter Replacement Options and Alternatives for Item Number:101124
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