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APEX MR-5051 Reverse Osmosis Drinking Water Filter System w/ Booster Pump - Made in U.S.A.

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APEX MR-5051 Reverse Osmosis Drinking Water Filter System w/ Booster Pump - Made in U.S.A.

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Regular Price: $273.00


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Enjoy Crisp Clean Refreshing Drinking Water for Your Healthy Lifestyle.

When you choose an APEX water filter, you'll get the absolute best water filter system for your needs from a company that values your business and will go above and beyond to ensure your full satisfaction.

Built in U.S.A.

Not only can you feel good knowing that APEX Water Filters gives Americans good-paying jobs, but you can also be certain that we carefully monitor each step in the manufacturing process because we produce our filtration systems locally.

If for any reason you're not completely satisfied with an APEX Water Filter, we'll replace it or refund the purchase price--no questions asked.

Quality Guaranteed

At APEX Water Filters, we believe that the best water filters start with the best materials. That's why we only use carbon that is certified by the National Safety Foundation and components that are approved by the U.S. Food and Drug Administration.

Before a water filtration system leaves our facility, we test it to ensure that it meets our high quality standards. This extra step ensures that you receive a filtration system in the best possible condition.



  • Configuration
  • Feed Water Source ***
  • Single Pass
  • City or Well Water*


  • Input
  • Output
  • Pressure Guages
  • UV Lamp
  • 1/2"     FNPT
  • 1/4"     Tube
  • Optional (Not Included)
  • Optional (Not Included)


  • Radial Flow Sediment
  • Radial Flow Carbon
  • Membrane
  • Axial Flow GAC
  • 1
  • 2
  • 1
  • 1

System Dimensions **

  • L x W x H inch (cm)
  • Weight lb.(kg)
  • 20 x 20 x 20(51x 51 x 51)
  • 25(11.3)

   * UV ray bacteria disinfection highly recommended for well water.

  ** Does not include operating space requirements.

*** Treatment ability of the system is dependent on feed water quality.Performance projections must be run for each installation.


Contaminant Reduction

Tubing Diagram


The MR-5051 reverse osmosis filtration system is a high-volume water purification system designed especially for water supplies with low or inconsistent water pressure. The reverse osmosis (RO) process requires a steady water pressure between 40 and 60 PSI to function properly. If the water pressure is too low or inconsistent, the efficiency and water output of reverse osmosis systems suffers. Water sources with low or inconsistent water pressure include wells, office and apartment complexes, and municipal water supplies with variable water pressure. The MR-5051 is ideal for RVs because campground water supplies often have low-pressure distribution systems. The high water production rate makes the MR-5051 suitable for commercial and industrial applications that require a continuous supply of purified water. These industries include laboratories, hydroponics, optical grinding and dental offices. The MR-5051 filtration process starts by first removing solid particulate matter like iron oxide (rust) particles, sand, loose calcium scale and insect parts. This prevents the filtration systems from clogging while eliminating these solids from entering your drinking water. Next, the water flows through two solid blocks of activated carbon. These twin porous compressed carbon block filters remove disinfection water treatment chemicals, like chlorine, chloramine and chlorine dioxide, that are responsible for taste and odor problems. Carcinogenic disinfection byproducts, called THMs, are removed by the carbon filters. The twin carbon cartridges also remove organic contaminants like VOC solvents, MTBE from leaking gasoline tanks, herbicides, insecticides and industrial chemicals that seep into groundwater. The next step involves the reverse osmosis (RO) process. The booster pump automatically adjusts the incoming water pressure to the proper pressure. As water flows through the RO membranes, heavy metals, like lead, copper and mercury, are removed while purified water passes through. The RO membranes also remove sodium, chlorides, fluoride, radon and nitrate. The purified then flows through a granular activated carbon (GAC) polishing filter. This cartridge removes any traces of tastes, odors and gasses, for crystal clear, sparkling drinking water.

The APEX MR-5051 also includes a water storage tank and designer dispensing faucet. As the RO filtration system makes purified water, it fills the water storage tank (up to 50 gallons per day). The storage tank supplies purified water to the designer faucet for drinking, meal preparation and pets. Your regular sink faucet will provide unfiltered water for washing dishes and clean-up tasks.

The APEX MR-5051 filtration system is pre-assembled and wet-tested. The filter system can be installed with simple hand tools. We recommend installation by a licensed plumber to insure adherence to all local codes. Routine replacement of the filter cartridges is recommended to maintain filter performance. Replacement cartridges are available from APEX Water Filters.


  • Stage 1
  • 1 micron polypropylene sediment pre-filter to extract suspended materials such as sediment, rust, insects, and other particles down to 5 micron. (Replace every 6-8 months) *
  • Stage 2 & 3
  • Double carbon block filters to absorb heavy chlorine byproducts such as chloramines, THM, and TCE. The double carbon briquettes filter out organic matter from water without release of carbon fines. The carbon block prepares water to enter the reverse osmosis element. (Replace every year) *
  • Stage 4
  • The high- rejection (up to 95%) TFC (Thin-Film composite) membrane to reject a wide range of total dissolved solids (TDS). The product water is storage tank, while the reject water (brain) is automatically flushed down the drain. (Replace every 2- 3 years) *

  • Stage 5
  • In line GAC filter to remove dissolved gases, bad taste & odor from product water. This is the final polishing stage before consumption. (Replace every 1-2 years) *

  • Hi / low pressure sensors for automatic pump control
  • Easy to install kit includes water storage tank, pure water dispensing faucet, drain saddle mount and feed water adapter

Operating Limits

  • Maximum Feed Temperature ℉ ( ℃ )
  • Maximum Feed Temperature ℉ ( ℃ )
  • Maximum Ambient Temperature ℉ ( ℃ )
  • Maximum Ambient Temperature ℉ ( ℃ )
  • Maximum Feed Pressure psi (bar)
  • Maximum Feed Pressure psi (bar)
  • Maximum Turbidity NTU
  • Maximum SDI Radting SDI
  • 85 ( 29.00 )
  • 40 ( 4.44 )
  • 120 ( 48.89 )
  • 40 ( 4.44 )
  • 85 ( 5.86 )
  • 45 ( 3.10 )
  • 1
  • <3
  • Maximum Free Chlorine ppm
  • Maximum TDS ppm
  • Maximum Hardness gpg ++
  • Maximum pH (Continuous)
  • Maximum pH (Continuous)
  • Maximum pH (Cleaning 30 Min.)
  • Maximum pH (Cleaning 30 Min.)
  • 0
  • <2000
  • 0
  • 11
  • 5
  • 12
  • 2

Test Parameters: 550 TDS Filtered (5 MIcron), De-Chlorine, Municipal Feed Water, 65 psi (4.50 bar) Feed Pressure, 77 Degrees F(25 Degress C), 7.0 pH. Data taken after 60 minutes of operation.

+ Low temperatures and high feed water TDS levels will significantly affect system production capabilities. Computer projections should be run for individual applications.

++ Scale prevention measures must be taken.

Options & Upgrades

1 x APEX MR-5051 Reverse Osmosis Drinking Water Filter System w/ Booster Pump - Made in U.S.A.   +$273.00

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