---
product_id: 361720778
title: "Pentek RFC20-BB Carbon Filter Cartridge, 20\" x 4-1/2\""
brand: "pentek"
price: "฿19729"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/361720778-pentek-rfc20-bb-carbon-filter-cartridge-20-x-4-1
store_origin: TH
region: Thailand
---

# 100,000 gal capacity Radial flow tech NSF/ANSI certified Pentek RFC20-BB Carbon Filter Cartridge, 20" x 4-1/2"

**Brand:** pentek
**Price:** ฿19729
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your home’s water game—because your family deserves the purest sip.

## Quick Answers

- **What is this?** Pentek RFC20-BB Carbon Filter Cartridge, 20" x 4-1/2" by pentek
- **How much does it cost?** ฿19729 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/361720778-pentek-rfc20-bb-carbon-filter-cartridge-20-x-4-1)

## 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

- • **Year-Long Freshness:** Filters up to 100,000 gallons—enjoy cleaner water for a full year without hassle.
- • **Taste the Difference:** Effectively reduces chlorine taste, odor, and sediment for crisp, refreshing water.
- • **Certified Peace of Mind:** NSF/ANSI Standard 42 certified for guaranteed safety and structural integrity.
- • **Pure Hydration, Zero Compromise:** Advanced radial flow tech ensures max filtration with minimal pressure loss.
- • **Seamless Fit, Effortless Upgrade:** Fits standard 20" Big Blue housings for quick, no-fuss installation.

## Overview

The Pentek RFC20-BB Carbon Filter Cartridge is a high-capacity, 20" whole house water filter featuring advanced radial flow technology and granular activated carbon to reduce chlorine, sediment, and odors. With a 100,000-gallon capacity, it delivers up to one year of efficient filtration without sacrificing water pressure. Compatible with standard 20" Big Blue housings and NSF/ANSI Standard 42 certified, it ensures safe, reliable, and better-tasting water throughout your home.

## Description

Pentek RFC20-BB Carbon Filter Cartridge, 20" x 4-1/2"

## 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 |
|---------------|-------|
| Material | Polyethylene (PE), Polypropylene (PP) |
| Product Dimensions | 11.4D x 11.4W x 50.8H Centimeters |
| Item Weight | 1.13 kg |
| External Testing Certification | NSF, ANSI |
| Product Benefits | Reduces Chlorine |
| Brand | pentek |
| UPC | 051678247433 |
| Global Trade Identification Number | 00051678247433 |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Manufacturer | Pentair Industries |
| Country of Origin | USA |
| Item model number | RFC20-BB |
| ASIN | B003SRQG0U |

## Product Details

- **Material:** Polyethylene (PE), Polypropylene (PP)
- **Product Dimensions:** 11.4D x 11.4W x 50.8H Centimeters
- **Item Weight:** 1.13 kg
- **External Testing Certification:** NSF, ANSI
- **Product Benefits:** Reduces Chlorine

## Images

![Pentek RFC20-BB Carbon Filter Cartridge, 20" x 4-1/2" - Image 1](https://m.media-amazon.com/images/I/61Da7aesdRL.jpg)

## 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.

## 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 Thailand*
*Store origin: TH*
*Last updated: 2026-04-29*