---
product_id: 506176632
title: "Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20\" x 4.5\", 25 Micron, Pack of 6, White"
brand: "pentek"
price: "€ 267.53"
currency: EUR
in_stock: false
reviews_count: 1
url: https://www.desertcart.sk/products/506176632-pentair-pentek-rfc-20bb-big-blue-carbon-water-filter-whole
store_origin: SK
region: Slovakia
---

# 100,000 gallon capacity Unique radial flow design NSF certified for safety Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White

**Brand:** pentek
**Price:** € 267.53
**Availability:** ❌ Out of Stock

## Summary

> 💧 Elevate your home’s water game with the power of Pentair’s Big Blue filtration!

## Quick Answers

- **What is this?** Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White by pentek
- **How much does it cost?** € 267.53 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/506176632-pentair-pentek-rfc-20bb-big-blue-carbon-water-filter-whole)

## Best For

- pentek enthusiasts

## Why This Product

- Trusted pentek brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Radial Flow Innovation:** Low pressure drop design minimizes carbon fines release, ensuring cleaner filtration.
- • **Certified Peace of Mind:** NSF International tested and certified to guarantee water safety and quality.
- • **Long-Lasting Performance:** Handles up to 100,000 gallons—replace annually or when water pressure drops.
- • **Pure Taste, Zero Compromise:** Effectively reduces sediment, chlorine taste, and odor for crystal-clear water.
- • **Universal Fit, Instant Upgrade:** Fits all 20" Pentair Big Blue and other heavy-duty housings for seamless replacement.

## Overview

The Pentair Pentek RFC-20BB Big Blue Carbon Water Filter is a heavy-duty, 20" x 4.5" granular activated carbon cartridge designed for whole-house filtration. Featuring a unique radial flow design, it reduces sediment, chlorine taste, and odor while maintaining low pressure drop and minimizing carbon fines. NSF certified and capable of filtering up to 100,000 gallons, it fits all standard 20" Big Blue housings, delivering reliable, great-tasting water for professional-grade home filtration.

## Description

Pentair Pentek RFC Series Cartridges are constructed with a 70-micron porous polyethylene outer shell and durable polypropylene endcaps. The 2-3⁄4" outer diameter cartridges have a polypropylene core and the 4-1⁄2" outer diameter cartridges incorporate a spun polypropylene core. Sandwiched between the outer shell and the core is a bed of granular activated carbon (GAC). The unique radial flow design offers the benefits of granular activated carbon (GAC) filtration, such as low pressure drop, while at the same time significantly reducing the release of carbon fines commonly associated with GAC-style cartridges. Pentek RFC Series Cartridges are available in a wide variety of sizes and are ideal for point-of-entry (POE) and other high flow rate applications.

Review: Been really happy with it, lasts about 1.5 months for a family of two. Unfortunately, my well water has a lot of sulfur and those filters help a lot with by completely removing the smell. I wish they were cheaper tho. Cannot wait to install contact tank with chlorine so I can fix my water cheaper than this option

## Features

- REDUCES SEDIMENT AND CHLORINE TASTE & ODOR to provide great tasting, clearer water
- FITS ALL 20" Pentair Pentek Big Blue or other 20" heavy duty filter housings and can replace any 20" x 4.5" carbon filter cartridge
- UNIQUE RADICAL FLOW DESIGN offers low pressure drop, while significantly reducing release of carbon fines commonly associated with GAC cartridges
- NSF INTERNATIONAL tested and certified for your peace of mind
- 100,000 GALLON CAPACITY. Replace every 1 year or when you notice a drop in water pressure or water quality

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09MSWW43N |
| Brand | Pentek |
| Colour | White |
| Customer Reviews | 5.0 5.0 out of 5 stars (7) |
| Date First Available | 15 Feb. 2022 |
| Item Weight | 13.3 kg |
| Material | Polypropylene Polyethylene |
| Model Number | 155247-43-APC |
| Product Dimensions | 11.43 x 11.43 x 50.8 cm; 13.27 kg |

## Product Details

- **External testing certification:** NSF
- **Item weight:** 29.25 Pounds
- **Material:** Polypropylene Polyethylene
- **Product benefits:** Removes Pollutants
- **Product dimensions:** 11.4D x 11.4W x 50.8H centimetres

## Images

![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White - Image 1](https://m.media-amazon.com/images/I/61yeSLMKuQL.jpg)
![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White - Image 2](https://m.media-amazon.com/images/I/81Nl6X4thyL.jpg)
![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White - Image 3](https://m.media-amazon.com/images/I/71U6dVnaq4L.jpg)
![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White - Image 4](https://m.media-amazon.com/images/I/718q5kklHcL.jpg)
![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White - Image 5](https://m.media-amazon.com/images/I/71ZZBSPbwML.jpg)

## Available Options

This product comes in different **Pattern, Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by I***Y on 3 February 2024*

Been really happy with it, lasts about 1.5 months for a family of two. Unfortunately, my well water has a lot of sulfur and those filters help a lot with by completely removing the smell. I wish they were cheaper tho. Cannot wait to install contact tank with chlorine so I can fix my water cheaper than this option

## Frequently Bought Together

- Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Carbon (GAC) Filter, 20" x 4.5", 25 Micron, Pack of 6, White
- Pentair Pentek DGD-5005-20 Big Blue Water Filter, 20-Inch Whole House Sediment Filter Cartridge Replacement, Dual-Gradient Density Spun Polypropylene, 20" x 4.5", 5 Micron, Pack of 6, White
- Captain O-Ring - Replacement 151122 O-Rings Compatible with Pentair Pentek Big Blue Water Filters OEM Size ORing Buna-N (3 Pack)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-26*