---
product_id: 437623039
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: "₨418199"
currency: LKR
in_stock: true
reviews_count: 13
category: "Pentek"
url: https://www.desertcart.lk/products/437623039-pentair-pentek-rfc-20bb-big-blue-carbon-water-filter-whole
store_origin: LK
region: Sri Lanka
---

# 100,000 gal capacity Radial flow tech Fits standard 20" Big Blue 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:** ₨418199
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water game—because your home deserves the best sip!

## 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?** ₨418199 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/437623039-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

- • **Effortless Flow:** Radial flow design keeps water pressure high with minimal carbon fines
- • **Whole Home Purity:** Eliminates chlorine taste & odor for fresher water everywhere
- • **Certified Peace of Mind:** NSF/ANSI 42 certified for safety and structural integrity
- • **Long-Lasting Performance:** Filters up to 100,000 gallons—up to 1 year of clean water
- • **Plug & Play Compatibility:** Fits most 20" Big Blue housings for easy swap & maintenance

## Overview

The Pentair Pentek RFC-20BB is a heavy-duty, whole house carbon water filter cartridge featuring advanced radial flow technology and granular activated carbon. Designed to reduce chlorine taste, odor, sediment, and contaminants, it delivers up to 100,000 gallons of filtered water with minimal pressure drop. Compatible with standard 20" Big Blue housings and NSF/ANSI 42 certified, this pack of six ensures long-lasting, reliable filtration for fresher, cleaner water throughout your home.

## Description

Upgrade your home's water quality with the Pentair Pentek RFC-20BB Whole House Carbon Water Filter. This high-capacity filter utilizes advanced radial flow technology and granular activated carbon (GAC) to effectively reduce chlorine taste and odor, sediment, and other contaminants from your water supply. The unique design ensures low pressure drop and minimizes carbon fines, providing efficient filtration without sacrificing water pressure. With a 100,000 gallon capacity, this filter offers long-lasting performance for up to one year before replacement is needed. Compatible with standard 20" Big Blue filter housings, the RFC-20BB is ideal for whole house filtration systems and point-of-entry applications. Constructed with a 70-micron porous polyethylene outer shell, polypropylene core, and durable endcaps, this filter is built to withstand the demands of whole house filtration. NSF/ANSI Standard 42 certified for material safety and structural integrity, the Pentair Pentek RFC-20BB delivers cleaner, better-tasting water throughout your entire home with confidence and reliability.

Review: The best filter ever! - I was able to order this filter originally through Vine. It was the best filter we've used to date, so I went to desertcart and purchased another, just to make sure we always have one on hand. Our vacation place is on the VA coast and anyone who has lived near the water knows how skanky well water can be near the coast. This filter is truly exceptional. Our water has never tasted better. It immediately got rid of that low-tide smell typical of water in our area. We've tried paper filters, carbon filters and magnesium filters. This filter is what we had been needing. So glad I was introduced to it via Vine. I will continue to purchase more through desertcart Prime. Pricey but worth it!
Review: Does the job - Arrived great condition and works well as a replacement filter.

## Features

- CLEANER, BETTER-TASTING WATER: Effectively reduces chlorine taste and odor, sediment, and other contaminants for improved water quality throughout your entire home
- HIGH-PERFORMANCE DESIGN: Unique radial flow technology ensures low pressure drop and minimal carbon fines, providing efficient filtration without sacrificing water pressure
- LONG-LASTING FILTRATION: 100,000 gallon capacity offers up to one year of whole house water filtration before replacement is needed
- VERSATILE COMPATIBILITY: Fits standard 20" Big Blue filter housings and replaces most 20" x 4.5" carbon cartridges for easy installation and maintenance
- CERTIFIED QUALITY: NSF/ANSI Standard 42 certified for material safety and structural integrity, ensuring reliable performance and peace of mind

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09MSWW43N |
| Batteries Required? | No |
| Best Sellers Rank | #11,729 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #103 in Replacement Under-Sink Water Filters |
| Brand | Pentek |
| Color | White |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,029) |
| Date First Available | December 1, 2021 |
| External Testing Certification | NSF |
| Global Trade Identification Number | 30051678247434 |
| Included Components | Carbon Water Filter |
| Item Package Quantity | 1 |
| Item Weight | 29.3 pounds |
| Item model number | RFC-20BB |
| Manufacturer | Pentair |
| Material | Polyethylene (PE), Polypropylene (PP) |
| Number Of Pieces | 6 |
| Number of Items | 6 |
| Part Number | 155247-43-APC |
| Pattern | Water Filter |
| Product Benefits | Removes Pollutants |
| Product Dimensions | 4.5"D x 4.5"W x 20"H |
| Set Name | Pack of 6 |
| Size | Pack of 6 |
| Style | 20" x 4.5" |
| Unit Count | 6.0 Count |
| Warranty Description | 30 day manufacturer |

## Product Details

- **External Testing Certification:** NSF
- **Item Weight:** 29.25 Pounds
- **Material:** Polyethylene (PE), Polypropylene (PP)
- **Product Benefits:** Removes Pollutants
- **Product Dimensions:** 4.5"D x 4.5"W x 20"H

## 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)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ The best filter ever!
*by N***H on April 19, 2025*

I was able to order this filter originally through Vine. It was the best filter we've used to date, so I went to Amazon and purchased another, just to make sure we always have one on hand. Our vacation place is on the VA coast and anyone who has lived near the water knows how skanky well water can be near the coast. This filter is truly exceptional. Our water has never tasted better. It immediately got rid of that low-tide smell typical of water in our area. We've tried paper filters, carbon filters and magnesium filters. This filter is what we had been needing. So glad I was introduced to it via Vine. I will continue to purchase more through Amazon Prime. Pricey but worth it!

### ⭐⭐⭐⭐⭐ Does the job
*by C***A on November 2, 2025*

Arrived great condition and works well as a replacement filter.

### ⭐⭐⭐⭐⭐ water filter
*by D***N on December 14, 2025*

excellent product

## 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
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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-26*