---
product_id: 11468779
title: "Pentair Pentek RFC-20BB Big Blue Carbon Water Filter"
brand: "pentek"
price: "871.17 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Pentek"
url: https://www.desertcart.tn/products/11468779-pentair-pentek-rfc-20bb-big-blue-carbon-water-filter
store_origin: TN
region: Tunisia
---

# Fits all 20-inch Big Blue housings 100,000+ gallons filtration capacity 0.90 psi low pressure drop at 4 gpm Pentair Pentek RFC-20BB Big Blue Carbon Water Filter

**Brand:** pentek
**Price:** 871.17 DT
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your home’s water game—taste the difference, feel the flow!

## Quick Answers

- **What is this?** Pentair Pentek RFC-20BB Big Blue Carbon Water Filter by pentek
- **How much does it cost?** 871.17 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/11468779-pentair-pentek-rfc-20bb-big-blue-carbon-water-filter)

## 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

- • **Whole-Home Freshness:** Eliminates chlorine taste & odor for fresher water at every tap
- • **Radial Flow Efficiency:** Innovative design ensures minimal pressure loss and fewer carbon fines
- • **Universal Compatibility:** Seamlessly fits any 20" Big Blue or heavy-duty housing for easy upgrades
- • **Long-Lasting Performance:** Filters over 100,000 gallons—up to a year of reliable service
- • **Certified Quality Assurance:** NSF/ANSI 42 certified for trusted, high-standard filtration

## Overview

The Pentair Pentek RFC-20BB is a premium 20-inch radial flow carbon water filter cartridge designed for whole-house filtration. Utilizing a deep bed of granular activated carbon, it effectively reduces chlorine taste and odor across all taps. Its radial flow design minimizes pressure drop to just 0.90 psi at 4 gpm and reduces carbon fines. Rated for over 100,000 gallons of filtration, it offers up to a year of service and fits all standard 20-inch Big Blue housings. Certified to NSF/ANSI 42 standards, it ensures high-quality, reliable water filtration for modern homes.

## Description

The Pentair Pentek RFC-20BB is a 20-inch radial flow carbon cartridge for whole-house, point-of-entry water filtration. A deep bed of granular activated carbon (GAC) reduces chlorine taste and odor across every tap for fresher-tasting water.Its radial flow design lets water pass through the carbon bed with a low pressure drop of just 0.90 psi at 4 gpm, and it reduces the carbon fines that standard GAC cartridges tend to release. Rated for more than 100,000 gallons of chlorine taste and odor reduction at 4 gpm, it offers up to about a year of high-flow service between changes.Built with a porous polyethylene outer shell, a GAC bed and a polypropylene core, the RFC-20BB measures 20" x 4.5" and fits all 20-inch Big Blue and other heavy-duty housings, replacing any 20" x 4.5" carbon cartridge. It is rated to 125°F and is tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements. Replace when taste or odor returns or flow drops.

Review: Good value, works well. - Delivered quickly, works well, reasonable price.
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!

## Features

- CLEANER, BETTER-TASTING WATER - Reduces chlorine taste and odor throughout your entire home so every tap delivers fresher-tasting water, using a deep bed of granular activated carbon (GAC).
- RADIAL FLOW CARBON DESIGN - Water flows radially through the carbon bed for a low pressure drop of just 0.90 psi at 4 gpm, while the design reduces the carbon fines commonly released by standard GAC cartridges.
- HIGH-CAPACITY WHOLE-HOUSE FILTRATION - Rated for more than 100,000 gallons of chlorine taste and odor reduction at 4 gpm, delivering up to about a year of whole-house service between changes.
- FITS ALL 20-INCH BIG BLUE HOUSINGS - Measures 20" x 4.5" and drops into any 20" Big Blue or other heavy-duty housing, replacing any 20" x 4.5" carbon cartridge. Ideal for point-of-entry and high-flow systems.
- NSF/ANSI 42 CERTIFIED BUILD - Tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements, with a porous polyethylene outer shell and polypropylene core rated to 125°F. Replace when taste or flow declines.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003SRQG0U |
| Best Sellers Rank | #12,645 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #91 in Replacement Under-Sink Water Filters |
| Brand | Pentek |
| Brand Name | Pentek |
| Customer Reviews | 4.7 out of 5 stars 1,061 Reviews |
| EU Spare Part Availability Duration | 1 years |
| External Testing Certification | NSF, ANSI |
| Global Trade Identification Number | 00051678247433 |
| Item Dimensions D x W x H | 4.5"D x 4.5"W x 20"H |
| Item Type Name | 20-Inch, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Activated Carbon (GAC) Filter, 20" x 4.5", 25 Micron |
| Item Weight | 2.5 pounds |
| Manufacturer | Pentair Industries |
| Manufacturer Part Number | 155247-43 |
| Material | Granular Activated Carbon |
| Material Type | Granular Activated Carbon |
| Model Number | RFC20-BB |
| Number of Items | 1 |
| Product Benefits | Removes Odor |
| Product Dimensions | 4.5"D x 4.5"W x 20"H |
| Set Name | Single Water Filter Cartridge |
| UPC | 051678247433 |
| Unit Count | 1 Count |

## Product Details

- **External Testing Certification:** NSF, ANSI
- **Item Weight:** 2.5 pounds
- **Material:** Granular Activated Carbon
- **Product Benefits:** Removes Odor
- **Product Dimensions:** 4.5"D x 4.5"W x 20"H

## Images

![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter - Image 1](https://m.media-amazon.com/images/I/61Da7aesdRL.jpg)
![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter - Image 2](https://m.media-amazon.com/images/I/81Nl6X4thyL.jpg)
![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter - Image 3](https://m.media-amazon.com/images/I/71U6dVnaq4L.jpg)
![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter - Image 4](https://m.media-amazon.com/images/I/71rlljg1oUS.jpg)
![Pentair Pentek RFC-20BB Big Blue Carbon Water Filter - Image 5](https://m.media-amazon.com/images/I/71ZZBSPbwML.jpg)

## Available Options

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

## Questions & Answers

**Q: In what way is this filter diffrrent (better?) than the gac-20bb? for whole house chlorine removal before a water softener.**
A: These are both carbon filters, and will fit the same housings, the main difference is how they are constructed, which affects the performance.
RFC20-BB filters offer a radial flow design which greatly reduces the pressure drop (RFC20-BB is rated at 0.9 psi pressure drop at 4 gpm,  while the GAC-20BB you are comparing to is rated at 10 psi pressure drop @ 4gpm).
The RFC20-BB filters also have a higher filtration capacity.  RFC20-BB are rated at >100,000 gallons of chlorine taste and odor reduction at 4gpm,  while the GAC-20BB are rated at 25,000 gallons.

**Q: Would this work with other 20 x 4.5 filter systems, like a replacement for an american plumber wrc25hd20?**
A: RandyYes this filter will work in other systems that take 4"x 20" filter

**Q: This filter is 1/2 " longer then the old one will it still work?**
A: This filter is designed to fit into the 10 inch Big Blue filter housings which is similar in size to most other 10 inch heavy duty filter housings.  We have not made changes to the length of these cartridges, so if you had this model previously, it should still fit correctly.  Not knowing what specific housing you have, I cannot for certain tell if this cartridge will fit.  If you would like further details, please reach out to our technical support team (USA based) at 800-279-9404.

**Q: Is this good enough for a spotless car wash filter?**
A: The RFC can be used as pretreatment for equipment that actually provides spotless rinse. This filter in itself does not provide spotless rinse.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good value, works well.
*by G***N on June 18, 2026*

Delivered quickly, works well, reasonable price.

### ⭐⭐⭐⭐⭐ 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!

### ⭐⭐⭐⭐⭐ Reliable wuality
*by J***N on February 10, 2026*

I rely on the effectiveness of this product to keep my well hard water nice and soft. It's great for my laundry and whole house water quality. I've been using it for several years

## Frequently Bought Together

- Pentair Pentek RFC-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Heavy Duty Radial Flow Carbon Replacement Cartridge with Granular Activated Carbon (GAC) Filter, 20" x 4.5", 25 Micron
- 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 1, 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 Tunisia*
*Store origin: TN*
*Last updated: 2026-08-09*