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5-Stage Reverse Osmosis System by Tier1

$199.00 MSRP:  $249.99

Availability: In stock




The 5-Stage Reverse Osmosis System by Tier1 is the complete package, using 5 stages to deliver up to 50 gallons of filtered water per day, the Tier1 RO5 is an ideal solution to your drinking water needs. Water travels through Sediment and Activated Carbon pre-filter stages, preventing large particles and chlorine from ever making it to the valuable main filter. This treated water then meets the RO membrane, where dissolved metals, minerals, and salts are separated and rejected straight down a separate waste water drain. This portion of the process captures the nastier contaminants like barium, cadmium, chromium (III and VI), copper, fluoride, lead, mercury, nitrates, nitrites, radium, selenium, and total dissolved solids (TDS). Lastly, the water is polished by a carbon post-filter removing odors, bad tastes, and other hindrances to the perfect drinking/cooking water experience. Once processed, the water is transferred to an automatic shutoff valve equipped storage tank where it waits for you to turn on the tap! This system includes all of necessary parts: starting filters, membranes, housings, brackets, shut-off valve, saddle valves, tubing, fittings, standard long reach chrome faucet, and installation instructions. Order today!


Package Qty 1
Used In Brands Tier1
Manufacturer's Id RO5
UPC 799932637230
Actual Size (in) 18 1/2 inches (Length) x 18 inches (Width) x 18 inches (Depth)
Operating Pressure (psi) 40 - 75
Operating Temperature (°F) 40 - 100
Flow Rate (gpm) 0.5
Flow Rate (gpd) 50
Color / Finish White
Warranty Guarantee Unconditional Product Guarantee for Life of the Product
Includes Two 5 Micron Sediment Filters, Two Carbon Filters (Carbon Block and Inline), Reverse Osmosis Membrane, Tank, Component Parts, Chrome Faucet, and Housing Wrench
Primary Filter Media Semi-Permeable Membrane


Reduces the following contaminants:
  • Arsenic
  • Barium
  • Cadmium
  • Chlorine Taste & Odor
  • Chromium (III / Trivalent)
  • Chromium (VI / Hexavalent)
  • Copper
  • Cryptosporidium
  • Cysts
  • Fluoride
  • Giardia
  • Lead
  • Mercury
  • Nitrates / Nitrites
  • Radium
  • Selenium
  • Total Dissolved Solids (TDS)
  • Toxoplasmacysts
  • Turbidity

The TIER1-RO5 is comparable with the following part numbers


Fits the Following Model Numbers


Replacement for the Following UPC



Reverse Osmosis System Inside

Why use Reverse Osmosis?

Reverse Osmosis is a water purification technology that utilizes a semi-permeable membrane to remove up to 99% of the contaminants from your drinking water. Unlike some traditional water filters, reverse osmosis water filters are able to remove dissolved solids. These are typically referred to as Total Dissolved Solids in water industry testing and measurements.

The dissolution of organic or inorganic matter in water occurs based on water's universal solvency. This means that over time substances, with the exception of oil based materials, will dissolve and become part of the chemical makeup of the water source they reside in. Many of these items are not harmful and Municipal Water Sources are treated to reduce or remove any contaminants harmful to a resident population.

Much like a standard under-sink filter, the critical difference is the semi-permeable membrane that traps specific types of contaminants that standard sediment or carbon filters cannot. For Example, they are the only water filter system certified to remove arsenic, 98% of chlorine and in some cases, Flouride. If you are concerned about the removal of any TDS substance, or a particular chemical or compound in your water, Reverse Osmosis is most likely the best filtration option for you.

What do the filters do?

Reverse Osmosis systems use between 3 and five stages. Although specific designs vary, there are three main types of filters involved in all Reverse Osmosis systems. For your reference, we have included a short description of each of their functions below:

Sediment filters are used to remove physical particulates from a water source. These contaminants include Sand, Rust, Silt, Soil and the like. These are caught in a mesh, screen or wrap that is designed to allow only material of a certain size through it.

The spaces that allow water to flow through them use a measurement called a "Micron" in order to communicate what will and will not be stopped by the filtration media. For your reference, most grains of milled household flower are each 25 microns. Industry Standard Sediment Filters can differ in Micron Size from 0.5 Micron to 100 Microns.

These are designed to catch specific particulates varying from the size of a grain of sand to the size of a micro-organism. Contaminants removed by certain micron ratings are larger than the given channels are are caught in the media itself. Correspondingly, larger micron ratings, 50-100 microns, will have an increased flow rate while lesser micron ratings, 1 - 50 Microns, will have a more restricted flow rate.

Primarily, sediment filters used in reverse osmosis systems are Industry Standard 10" by 2.5" filters. This can vary based on the system itself.

Sediment filters are primarily made of one of two different media types: Cellulose or Polypropylene.

Cellulose: Cellulose users prefer this organic plant matter media as it is able to provide excellent small micron and industry standard filtration. In order to use Cellulose filters however, users must be filtering treated or municipal water. This is because cellulose's organic media makes it susceptible to micro-organism consumption. Some Micro-organisms can feed on the cellulose and this can cause degradation of both the filter and its functionality. There is no fear of this if the cellulose filter is used with treated water so an understanding of the treatment status of your water source is necessary for its use. For more information on cellulose filters, please visit our Resource Center entry here.

Polypropylene: Polypropylene is a plastic based synthetic media that functions in the same way as cellulose, but does not pose any risk from micro-organisms. It can be made to suit the same micron ranges. However, Polypropylene is a less cost effective option.

Sediment filters should be chosen based on the largest micron rating possible to filter out the most specific particulates present in your water source. By keeping your micron rating as large as possible, while still being effective, you will provide the needed filtration at the best available flow rate.

Carbon Filters are primarily used to address the "aesthetic" concerns in a water source. In most cases, this is Chlorine Taste and Odor that is created by typical civic water treatments. The water industry considers this function water "polishing". Additional polishing can be applied to water that contains sulphates and other odor causing contaminants.

Depending on the product itself, Carbon is also capable of removing organic chemicals, herbicides volatile organic compounds and industrial pesticides. In some cases chlorine and chloramines can also be reduced rather than just having their odor and taste removed.

Carbon Filtration is effective based on its ability to capture contaminants through a process called "Absorbtion". Pollutant molecules are trapped in the minute pore structure of the carbon media itself. Much like sediment filtration, the particles and unwanted chemicals are trapped in the media while the water is allowed to flow unimpeded through the filter.

Also like Sediment Filters, Carbon Filters are also assigned a Micron rating. This communicates how effective they will be at stopping particulate contaminants. Carbon media is a more expensive material and correspondingly, industry standard water filtration systems use a Sediment filter previous to a carbon filter. This is done in order to increase the filter life of the Carbon Filter.

By using the sediment filter to capture the majority of the particulates present in the water source, multi-stage systems will allow the carbon filter to utilize its functionality on chemical and polishing filtration. This increases both the benefits of the filtration as well as the cost effectiveness of the water filtration System.

Reverse Osmosis Membranes primarily use TFM, or Thin Film Membranes. The material is synthetic and can be produced with a porosity of 1/10,000th of a Micron. The filtration provided by such a infinitesimal size restriction is why people are drawn to Reverse Osmosis systems.

To recap some of what has been written previously on this page, similar to a standard mechanical filter, the semi-permeable Reverse Osmosis Membrane traps specific types of contaminants that standard sediment or carbon filters cannot. For Example, they are the only water filter system certified to remove arsenic, 98% of chlorine and in some cases, even Flouride. If you are concerned about the removal of any TDS, or Total Dissolved Solid, or a particular chemical or compound in your water, Reverse Osmosis is most likely the best filtration option for you.

Again, these systems are designed to remove up to 98% of the contaminants found in a given water source. Each system will have its own specifications and testing results based on the quality and design of the membrane as well as the additional parts of the system. Results will also vary based on the quality of the source water being filtered. Reverse Osmosis Membranes may be the final filter in three or four stage systems or the fourth step in five stage systems. Regardless of their placement, their function will be the same.

Reverse Osmosis Membranes will have a gallon per day rating that will provide consumers with an understanding of how many gallons of water a membrane can produce for consumption each day. This water is usually stored in a holding tank for later use.

Quality Control and Product Excellence

1. Component Integrity

Our Products begin their lifecyle with a rigorous component integrity examination.

2. Construction Process

After all components pass a full battery of tests, products are carefully assembled and constructed.

3. Testing Process

Each product is put through extensive tests to ensure the best possible performance and quality.

4. Packaging and Shipping

Once our Products have passed inspection, they are cautiously packaged and shipped to ensure they are safe throughout their travels.

5. Final Inspection

Before any products are cleared for shipping, they undergo an additional final inspection to ensure a defect free shipment.