US Water 50 to 150 GPD RO-DI System

Sku: 200-RO-DI

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Regular Price: $748.00
Sale Price: $449.00
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6-Stage 50 to 150 GPD Reverse Osmosis & Deionization System

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Product Description

Product Description

US Water 6-Stage 50 to 150 GPD Reverse Osmosis & Deionization System

Some applications allow for reverse osmosis which removes 90% to 95% of the total dissolved solids. Other applications require deionized (DI) water which has all the minerals removed. If you require DI water, then you should use reverse osmosis (RO) as the primary demineralization method and use DI as the secondary demineralization method. Why use both processes and not just DI? The answer is very simple: It costs about 300% more to demineralize water with deionization than with reverse osmosis. So the smart money is to take out 90% to 95% of the total dissolved solids with the RO and then "polish" it with the DI cartridges - the cost per gallon is dramatically less.

  • Stage 1: 5 Micron Pre-Filter
  • Stage 2: Carbon Block Filter
  • Stage 3: Chloramine Carbon Filter
  • Stage 4: 50 to 150 GPD TFC RO Membrane
  • Stage 5: DI Cartridge
  • Stage 6: Second DI Cartridge


  • Includes an HM Digital Commercial-Grade Conductivity Monitor
  • Includes 4.5 Gallon Storage Tank



  • 4.5 Gallon Storage Tank is 11" diameter x 14" high
  • 3/8" Fittings
  • RO Module is 16" x 16" x 6"
  • DI Module is 9" x 16" x 6"
  • Includes 20 Feet of 1/4" and 20 ft. of 3/8" tubing
  • System is fully modular and RO and DI components can be mounted in any configuration.

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Additional Information

Additional Information

Availability In Stock
Filter Type DI
Manufacturer US Water Systems

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Ratings & Reviews

Ratings & Reviews

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Product FAQs

Product FAQs

  • Our tap water is chlorinated as well as fluoridated. Will this system remove those two chemicals?

    If you plan to use this for drinking water, I would not do that.  This is a much better way to remove fluoride, chloramine and chlorine:

  • I have a Milli-Q that will take this feed RODI water to fill it's 6.5 gallon tank. It requires 0 - 0.3 bar pressure input. What is the output pressure of this RODI system?

    The outlet pressure is relative to the inlet pressure feeding the system.  It typically will reduce the inlet pressure by 30-45%.  If you want pressure that is equivalent to inlet pressure you will add a permeate pump.  Here is the link;

  • What is the minimum feed pressure required for this unit?

    For the best performance, the system should have 40-60 PSI.  It can operate on 30 PSI but the water will be slow to come out of the faucet.  The other thing to consider is if the feed pressure is low, the membrane can’t compress as tightly.  That will sometimes compromise the end quality.  The good thing is even on low pressure feeds there is a solution.  You can add the following pump and it will boost the pressure to the RO;

    this will give you optimal performance but will require a power source.  If you go with a Permeate Pump RO like this one:

    your end pressure will match your feed pressure.

  • IS THIS REALLY 2.5" X 10"


  • How much pressure will the outlet be with a 75psi feed?

    Approx 45-50 PSI

  • What is the final conductivity of the water in megaohms? Is there charcoal in the deionizer cartridges to remove organics leaching from the resins?

    The final conductivity can be up to 15 or 16 meg ohms.

     The carbon is before the DI so organics are not generally a problem.