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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.

Availability: In stock

Regular Price: $273.00


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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.

APEX MR-6050
MR-5000 Series

Figure 1.0     Function of APEX Reverse Osmosis Drinking Water Filter

  • Large capacity 5-stage reverse osmosis drinking water purification system for residential and light commercial applications
  • Includes a booster pump to maintain proper water pressure for maximum pure water output
  • 1-micron polypropylene pre-filter removes calcium scale particles, rust, sand and other microscopic debris
  • Dual high surface area 5-micron activated carbon cartridges remove chlorine, chloramine, tastes and odors, radon, pesticides and carcinogenic chemicals like solvents and MTBE
  • High-efficiency Thin Film Composite reverse osmosis membrane removes up to 99% of water contaminants like nitrate, TDS, fluoride, lead, sodium and mercury
  • Granular activated carbon post-filter removes all traces of tastes and odors as a final polishing stage
  • Easy to install kit includes water storage tank and pure water dispensing faucet
  • Pressure sensors for automatic pump control
  • Built and quality-checked in the USA
Filter Stages
Figure 1.1     Contaminant Removal from Filter Stage

Metpure Brushed Nickel Drinking Water Faucet

Metpure Brushed Nickel Drinking Water Faucet
  • High quality premium Coke-style ceramic disc lever faucet crafted with solid brass exterior for durability and lasting finish
  • Included FREE faucet wrench eases installation time by more than half and ensures tight mount
  • connects to 1/4” tubing
  • Gooseneck that swivels 360 degrees
  • 3” shank for easy installation under sink
  • Requires 1/2” hole for minimal countertop drilling (soap dispenser hole can be used)

Where Style, Convenience & Purity Meet

pH7 Pull Down Faucet Not Included
Included Metpure Brushed Nickel Faucet
Where Style, Convenience & Purity Meet
Figure 1.2     Kitchen Countertop Appearence



  • 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.
Operating Limits
  • Maximum Feed Temperature ℉ (℃)
  • MinimumFeed Temperature ℉ (℃)
  • Maximum Ambient Temperature ℉ (℃)
  • Minimum Ambient Temperature ℉ (℃)
  • Maximum Feed Pressure psi (bar)
  • Minimum Feed Pressure psi (bar)
  • Maximum Turbidit NTU
  • Maximum SDI Rating 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)
  • Minimum pH (Continuous)
  • Maximum pH (Cleaning 30 Min.)
  • Minimum 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.
  • AWater supply adapter valve
  • BCold water shut-off valve
  • CAuxiliary faucet
  • DGarbage disposal
  • EPre-carbon filter sumps
  • FDrain Saddle
  • GStorage tank with valve in open Position
  • HPre-filter sump
  • IMembrane assembly
  • JPost-filter
Under Sink Setup
Figure 1.3     Under Sink Setup
Reverse Osmosis Drinking Water Systems
Plumbing Support Recommended

Plumbing Support Recommended

Water pressure can cause leaks and damage the surrounding building or fixtures if not properly installed. User must check all fittings for tightness. APEX assumes no responsibility for water damage due to leaks.

Options & Upgrades

Regular Price: $273.00