Pentek RO-2550 4-Stage NSF-Validated Reverse Osmosis System

Pentek RO-2550 Reverse Osmosis System

Pentek RO-2550 Reverse Osmosis System

Our Price: US$149.95

(In Stock)

(0 Reviews)
Be the first to write a review.

Found a Lower Price?
Request a Price Beat
Free Shipping on RO-2550 Reverse Osmosis System

Great value in a brand-name, performance-validated RO system!

Reverse osmosis, also known as nano or ultra-filtration, is the finest home water treatment system available, capable or removing particles as small as 1/1000 of a micron. The Pentek RO-2550 is manufactured by U.S. based Pentair Water, the largest manufacturer of water treatment products in the world. It has been third-party tested and certified by NSF International against NSF/ANSI Standard 58 for the reduction of Barium, Cadmium, Chromium (Hexavalent and Trivalent), Copper, Cysts, Fluoride, Lead, Radium 226/228, Selenium, Turbidity, and Total Dissolved Solids (TDS). Like most reverse osmosis systems, it can also be expected to significantly reduce a wide range of other contaminants as well.

The Pentek RO-2550 reverse osmosis system offers high quality drinking water at a fraction of the cost of bottled water and without the hassle of re-filling bottles. Bottled-water quality drinking water will be right at your fingertips anytime you need it, for drinking, cooking, and more. Its compact size makes it a great choice for use in homes, cottages, recreational properties, and even RVs! The RO-2440 can be easily connected to your fridge ice-maker and water dispenser.

Pentek RO-2550 Features:

  • brand name - Pentek is the largest manufacturer of water treatment equipment in the world (based in Milwaukee, WI, USA)
  • third-party performance validation (NSF-Standard 58)
  • premium quality Thin Film Composite (TFC) reverse osmosis membrane
  • high performance sediment & carbon pre and post-filters including 10 micron carbon block pre-filter!
  • filtration to 1/1000th of a micron
  • easy under-sink installation - space-saving compact design
  • low annual maintenance costs
  • eliminates the cost & hassle of bottled water
  • features automatic shut-off valve when tank is full - doesn't waste water unnecessarily!
  • includes treated storage tank (2.8 gallon maximum capacity), long-reach chrome faucet, and all installation hardware
  • can easily be connected to fridge icemaker / water dispenser
RO-2550 Filters and Specifications
Manufacturer Part # 161079
Stage 1: Sediment Pre-Filter Pentek P5 - 5 Micron Spun Poly Sediment Filter
Replace every 6 months
- traps silt/dust, rust and sand that affect the taste and appearance of your water - it also protects the other filters from premature fouling.
Stage 2: Activated Carbon Block Pre-Filter Pentek EPM-10 - 10 Micron Coconut Activated Carbon Block
Replace every 3-6 months
- reduces chlorine (and chlorine bi-products), bad tastes, odors, and more.
Stage 3: Reverse Osmosis Membrane TFM-50 Thin Film Composite (TFC)
Replace every 18-24 months
Stage 4: Activated Carbon Post Filter Pentek GS-10RO - Granular Activated Carbon Post-Filter
Replace every 12 months
- enhances clarity and taste of your water to ensure the ultimate level of quality is attained.
Size: 13 1/2" wide x 5 1/2" deep x 17 1/4" high; 17.3 lbs
Storage Tank: 2.8 gallon max. capacity depending on water pressure
Approx. Size: (diameter: 9 inches; height: 13.5 inches)
Output / Production: Testing by NSF International according to NSF/ANSI Standard 58 yielded 15.04 gallons per day with source water test parameters of 50 PSI pressure input, water temperature of 77F, pH of 7.5 +/- 0.5, and 750 ppm total dissolved solids (TDS). Higher production rates are expected with lower TDS levels. Lower production rates can be expected at colder incoming water temperatures.
Self-Cleaning: The RO-2550 system uses a process of crossflow to constantly clean the membrane to prevent pre-mature fouling and clogging.

For more information of the removal/reduction of various contaminants by carbon filtration and reverse osmosis, please CLICK HERE.

This system is designed for use on all chlorinated and non-chlorinated potable water supplies. It is an excellent choice for most homes. If you do not receive your water from a municipal water system (you get your water from a well, lake or other non-treated source), you should have your water tested to ensure it is biologically safe (free of bacteria, viruses, and other harmful microorganisms) before using a reverse osmosis filter as your only water treatment. If your water is biologically contaminated, you should consider a point-of-use or whole-house ultraviolet purifier in addition to your reverse osmosis unit to kill any remaining microorganisms.

Recommended Source Water Parameters:

Pressure: 40-100 PSI (2.7-6.9 bar)
Temperature: 40-100F (4-38C)
pH: 3-11
TDS Level: less than 2000 ppm (mg/L)
Turbidity: less than 11.0 NTU
Hardness(CaCO3):<10 GPG (170 mg/L)
Iron (Fe): <0.1 ppm (mg/L)
Manganese (Mn): <0.05 ppm (mg/L)
Hydrogen Sulfide (H2S): 0.01 ppm (mg/L)
Residual Chlorine: <2.0 ppm (mg/L)
Average Reduction for Various Contaminants under NSF/ANSI Standard 58 Testing:
Barium 98.3%
Cadmium 98.7%
Chromium (Hexavalent) 91.2%
Chromium (Trivalent) 94.8%
Copper 98.9%
Fluoride 95.6%
Lead 98.7%
Radium 226/228 80.0%
Selenium 96.0%
Turbidity 99.0%
Total Dissolved Solids (TDS) 96.2%
Cysts 99.99%


Pentair Residential Filtration warrants to the original owner (under normal use) to be free from defects in material and/or workmanship for one (1) year from the date of purchase.

Pentek RO-2550 Reverse Osmosis System Installation

The filtration unit and storage tank mount under your sink, out of sight. Water supply is gained by attaching a simple adapter to your cold water supply pipe (copper or plastic). You will have to drill a hole in your countertop or sink frame to attach the attractive long-reach faucet. It is a relatively easy do-it-yourself project, or if you prefer, you can have it installed by a handyman or plumber. The unit includes all installation hardware and a complete installation guide.

RO-2550 installation guide
Owner's Manual & Installation Guide

Replacement Filters:

Pentek P5 <br>5 Micron Sediment Filter<br>Single Filter

Pentek P5
5 Micron Sediment Filter
Single Filter

MSRP: US$4.67
Our Price: US$3.62
You save: $1.05

- More Info -
Pentek P5 <br>5 Micron Sediment Filter <br>Case of 24

Pentek P5
5 Micron Sediment Filter
Case of 24

MSRP: US$112.08
Our Price: US$86.95
You save: $25.13

- More Info -
Pentek EPM-10 <br>Carbon Block Water Filter<br>Case of 12

Pentek EPM-10
Carbon Block Water Filter
Case of 12

MSRP: US$93.60
Our Price: US$77.88
You save: $15.72

- More Info -
GE/Pentek <br>TFM-50 <br>RO Membrane

RO Membrane

MSRP: US$46.94
Our Price: US$38.95
You save: $7.99

- More Info -
Pentek <br>GS-10RO <br>Carbon Post Filter

Carbon Post Filter

MSRP: US$30.35
Our Price: US$19.95
You save: $10.4

- More Info -

Note: this product is not available in the State of California. CLICK HERE for more information.

Note: The contaminants or other substances removed or reduced by this water treatment device are not necessarily present in your water.