---
product_id: 117189994
title: "Pentair Pentek CRFC20-BB Big Blue Carbon Water Filter, 20-Inch, Whole House Chloramine Reduction Carbon Replacement Cartridge, 20\" x 4.5\", 25 Micron"
brand: "pentek"
price: "€ 313.10"
currency: EUR
in_stock: true
url: https://www.desertcart.ie/products/117189994-pentair-pentek-crfc20-bb-big-blue-carbon-water-filter-20
store_origin: IE
region: Ireland
---

# 20-inch size 200,000-gallon capacity 25-micron filtration Pentair Pentek CRFC20-BB Big Blue Carbon Water Filter, 20-Inch, Whole House Chloramine Reduction Carbon Replacement Cartridge, 20" x 4.5", 25 Micron

**Brand:** pentek
**Price:** € 313.10
**Availability:** ✅ In Stock

## Summary

> 💦 Elevate Your Hydration Game!

## Quick Answers

- **What is this?** Pentair Pentek CRFC20-BB Big Blue Carbon Water Filter, 20-Inch, Whole House Chloramine Reduction Carbon Replacement Cartridge, 20" x 4.5", 25 Micron by pentek
- **How much does it cost?** € 313.10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/117189994-pentair-pentek-crfc20-bb-big-blue-carbon-water-filter-20)

## 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

- • **Universal Fit:** Compatible with all 20" Big Blue housings for effortless upgrades.
- • **Innovative Design:** Minimizes carbon fines for a smoother filtration experience.
- • **Chloramine Champion:** Superior reduction of chloramine and chlorine for cleaner water.
- • **Transform Your Water:** Experience the purest taste with reduced sediment and chlorine.
- • **Long-lasting Performance:** Enjoy up to 200,000 gallons of crystal-clear water before replacement.

## Overview

The Pentair Pentek CRFC20-BB Big Blue Carbon Water Filter is a high-capacity, 20-inch replacement cartridge designed to significantly reduce chloramine and chlorine, ensuring great-tasting, clear water for your entire home. With a filtration capacity of 200,000 gallons and a 25-micron rating, this filter fits all standard 20" Big Blue housings, making it a versatile and essential upgrade for any household.

## Description

Pentair Pentek CRFC20-BB Big Blue Carbon Water Filter, 20-Inch, Whole House Chloramine Reduction Carbon Replacement Cartridge, 20" x 4.5", 25 Micron

## Features

- REDUCES SEDIMENT AND CHLORINE taste & odor to provide great tasting, clearer water
- FITS ALL 20" Big Blue Housing and can replace any 20" x 4.5" carbon filter
- SUPERIOR CHLORAMINE AND CHLORINE REDUCTION than granular carbon
- UNIQUE DESIGN REDUCES CARBON FINES in filtered water typically found in other granulated canisters
- 200,000 GALLON CAPACITY. Replace every year or when you notice a drop in water pressure or water quality

## Product Details

- **Material:** Extruded Carbon Block
- **Product Dimensions:** 4.5"D x 4.5"W x 20"H
- **Item Weight:** 3.45 Pounds
- **External Testing Certification:** NSF
- **Product Benefits:** Reduces Chlorine

## Images

![Pentair Pentek CRFC20-BB Big Blue Carbon Water Filter, 20-Inch, Whole House Chloramine Reduction Carbon Replacement Cartridge, 20" x 4.5", 25 Micron - Image 1](https://m.media-amazon.com/images/I/51YkIexJ1rL.jpg)

## Available Options

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

## Questions & Answers

**Q: Do you have drop in water pressure?**
A: We have had no drop in pressure.  It is a great filter I have several larger micron filters in front of this one to capture some of the larger particles so this one will last longer and has worked out great.

**Q: How long do these last. Average use 2 people in house.**
A: I run 35000 gallons through them which for a house of 3 lasts about nine months.

**Q: Does the 10" filter out Chloramine?**
A: Yes.
Chloramine Taste & Odor Reduction
(3.0-0.5 ppm) @ flow rate (gpm):
10,000 gallons @ 5 gpm
25,000 gallons @ 2.5 gpm

**Q: How long do these last**
A: I replace every 4 months but we go through a lot of water

## Frequently Bought Together

- Pentair Pentek CRFC20-BB Big Blue Carbon Water Filter, 20-Inch, Whole House Chloramine Reduction Carbon Replacement Cartridge, 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 Ireland*
*Store origin: IE*
*Last updated: 2026-03-06*