Reliable, clean, great-tasting water — backed by NSF certification.

Overview:

The Pentek RO-2550 is a trusted 4-Stage under-sink Reverse Osmosis filtration system manufactured by Pentair Water, one of the world’s most respected water treatment companies. Compact, efficient, and NSF-certified, it’s an excellent choice for homeowners who want dependable drinking water without high maintenance or complexity.

With proven performance and a complete installation kit included, the RO-2550 integrates seamlessly into kitchens, small spaces, and even refrigerator/ice maker lines.

⭐ Why Homeowners Choose the RO-2550

✔ NSF/ANSI Standard 58 Certified

Independently tested for the reduction of:
Barium, Cadmium, Chromium VI & III, Copper, Cysts, Fluoride, Lead, Radium 226/228, Selenium, Turbidity, and Total Dissolved Solids (TDS).

✔ Designed & Manufactured by Pentair (Pentek)

A U.S.-based global leader in residential and commercial water treatment.

✔ High-Quality TFC RO Membrane

Reduces dissolved solids and impurities for clean, crisp drinking water.

✔ Complete Under-Sink System

Comes with a treated 2.8-gallon storage tank, carbon stages, sediment filter, membrane, faucet, and full hardware kit.

✔ Easy, Space-Saving Installation

Compact design fits most cabinets and can be connected to your fridge or ice maker.

✔ Smart Automatic Shut-Off Valve

Stops water production when the tank is full, helping reduce waste.

💧 How the 4-Stage Filtration Process Works

Stage 1 – Sediment Filter
Captures sand, silt, rust, and particulate matter to protect downstream filters.

Stage 2 – Carbon Block Pre-Filter
Reduces chlorine and chemical impurities that can affect membrane performance and taste.

Stage 3 – TFC RO Membrane
The heart of the system — reduces dissolved solids, fluoride, heavy metals, and other impurities (as certified under NSF 58).

Stage 4 – Carbon Post Filter
A final polishing stage that enhances clarity, taste, and odor for fresh, clean drinking water.

🔬 NSF 58 Certification

The Pentek RO-2550 is certified by NSF International for the reduction of:

• Barium

• Cadmium

• Chromium VI & III

• Copper

• Cysts

• Fluoride

• Lead

• Radium 226/228

• Selenium

• Turbidity

• Total Dissolved Solids (TDS)

This third-party validation ensures reliable, trustworthy performance.

💧 Source Water Requirements

To ensure proper system performance:

• Pressure: 40–100 PSI

• Temperature: 40–100°F

• TDS: < 1,000 ppm

• Turbidity: < 1 NTU

• Hardness: < 10 gpg recommended

• Chlorine: Within municipal norms (carbon protects the membrane)

If you use well or rural water:
A water test is recommended. If biological contamination is present (coliform/E. coli), pair this system with a point-of-use UV purifier to neutralize microorganisms.

🔄 Replacement Filter Schedule

Keeping your system performing at its best:

Stage 1 – Sediment Filter
📅 Every 6 months

Stage 2 – Carbon Pre-Filter
📅 Every 6 months

Stage 3 – RO Membrane
📅 Every 2–3 years

Stage 4 – Carbon Post Filter
📅 Every 12 months

🔧 Installation Overview

• Fits neatly under most sinks

• Includes all hardware, tubing, and adapters

• Long-reach chrome faucet included

• Optional refrigerator/ice maker connection

• DIY-friendly design, or install via a handyman/plumber

📦 What’s Included

• Pentek RO-2550 filtration assembly

• TFC RO membrane

• Sediment + carbon pre-filter

• Carbon post-filter

• 2.8-gallon treated storage tank

• Long-reach chrome faucet

• Tubing, fittings, and adapters

• Installation hardware

• User instructions

🏡 Perfect For (Applications)

• Apartments & homes

• Kitchens & prep sinks

• Coffee/tea lovers

• Ice makers

• Anyone wanting reliable, certified drinking water