---
product_id: 11549116
title: "Pentek - 155281-43 BBF1-20MB Water Deionization Filter Cartridge, 20\" x 4-1/2\""
brand: "pentek"
price: "277476CFA"
currency: XOF
in_stock: true
reviews_count: 11
category: "Pentek"
url: https://www.desertcart.sn/products/11549116-pentek-155281-43-bbf1-20mb-water-deionization-filter-cartridge-20
store_origin: SN
region: Senegal
---

# 16 megohm resistivity max 20-inch Big Blue fit 1,850 grain capacity Pentek - 155281-43 BBF1-20MB Water Deionization Filter Cartridge, 20" x 4-1/2"

**Brand:** pentek
**Price:** 277476CFA
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water game with precision and power!

## Quick Answers

- **What is this?** Pentek - 155281-43 BBF1-20MB Water Deionization Filter Cartridge, 20" x 4-1/2" by pentek
- **How much does it cost?** 277476CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/11549116-pentek-155281-43-bbf1-20mb-water-deionization-filter-cartridge-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

- • **High-Capacity Longevity:** Handles 1,850 grains capacity—less frequent replacements, more uninterrupted workflow.
- • **Industrial-Grade Purity:** Semi-conductor-grade resin ensures ultra-low TOC & TDS for flawless water quality.
- • **Cost-Effective Excellence:** Optimized for demanding applications like pharma, cosmetics, and circuit board printing without breaking the budget.
- • **Maximum Resistivity Performance:** Delivers deionized water up to 16 megohms for precision lab and industrial use.
- • **Universal Big Blue Compatibility:** Fits all 20" x 4.5" Big Blue housings—upgrade without hassle or extra parts.

## Overview

The Pentair Pentek BBF1-20MB is a 20-inch mixed bed deionization filter cartridge designed for industrial and laboratory-grade water purification. Featuring semiconductor-grade resin, it achieves ultra-low total organic carbon and total dissolved solids, delivering water with resistivity up to 16 megohms. Compatible with all standard 20" Big Blue housings, it offers a high capacity of 1,850 grains, making it a cost-effective and reliable choice for pharmaceutical, cosmetic, and electronics manufacturing applications.

## Description

The Pentair Pentek BBF1-20MB is a high-capacity Big Blue deionization cartridge engineered for facilities that demand ultra-pure water. Built with semiconductor-grade mixed bed DI resin, this 20" x 4.5" cartridge reduces dissolved ions to produce water up to 16 megohm resistivity, meeting the stringent purity requirements of pharmaceutical labs, medical facilities, cosmetics production, and electronics manufacturing.With a 1,850 grain capacity, the BBF1-20MB delivers significantly longer service life than standard 2.5" diameter DI cartridges, making it a cost-effective solution for high-demand environments. The low TOC resin minimizes organic contamination, while the polypropylene shell, endcaps, and integrated pre/post-filters provide durable, chemically compatible construction. Buna-N gaskets ensure a secure seal in any standard 20" Big Blue housing.Designed for a suggested flow rate of 1.25 gpm with a minimal 1.1 psi pressure drop, this cartridge maintains consistent output quality across operating temperatures of 40-100 degrees F (4.4-37.8 degrees C). Suitable for boiler makeup, cooling towers, humidification systems, laser equipment, and steam applications.

Review: Excellent filters. Should last long - Wanted to upgrade the 10 inch filters to this and I was able to by getting the 20 inch housings and swapping some parts. I go through a lot of DI water at work and needed larger filters. We run our water through a water softener first. Then it goes through a set of GE Merlin RO filters which brings the TDS down to 11 ppm. Then the water goes through 2 of these 20 inch DI filters and then in to a storage tank. Using 3 calibrated TDS meters, we get 0 ppm. The resistivity through some machines is so high, we have to add a hint of tap water back. So it truly is DI water.
Review: Used it for spot free rinse on my cars. - This has worked great as a post free rinse on my cars i purchased solids parts per million counter and my water is around 180 , Once I'm done washing my car i hook up the filter and put the nozzle on a very low flow and rinse the car off "basically spot free rinse" Car comes out spotless This will hold me over until I'm able to purchase the larger spotless system.

## Features

- HIGH-CAPACITY, SEMI-CONDUCTOR-GRADE RESIN CARTRIDGES are ideal for use in a variety of industrial settings, including pharmaceutical and medical laboratories, cosmetics, and circuit board printing applications
- FITS ALL 20" Big Blue Housing and can replace any 20" x 4.5" filter cartridge
- CONVENIENT AND COST-EFFECTIVE for applications where low levels of total organic carbon (TOC) and total dissolved solids (TDS) are required
- DESIGNED FOR DEIONIZING WATER up to 16 megohms
- CAPACITY OF 1,850 grains

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004H3547U |
| Best Sellers Rank | #114,651 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,081 in Filters & Filter Media |
| Brand | Pentek |
| Brand Name | Pentek |
| Customer Reviews | 4.4 out of 5 stars 52 Reviews |
| External Testing Certification | FDA |
| Global Trade Identification Number | 00051678281031 |
| Item Dimensions D x W x H | 5"D x 5"W x 21.18"H |
| Item Type Name | Big Blue Deionization Water Filter, 20-Inch, Mixed Bed Deionization Filter Cartridge, 20" x 4.5" |
| Item Weight | 8.28 Pounds |
| Manufacturer | Pentair Industries |
| Manufacturer Part Number | 155281-44 |
| Material | Polypropylene (PP) |
| Material Type | Polypropylene (PP) |
| Model Number | BBF-20MB |
| Number of Items | 1 |
| Product Benefits | Removes Odor |
| Product Dimensions | 5"D x 5"W x 21.18"H |
| UPC | 051678281031 |
| Unit Count | 1.0 Count |

## Product Details

- **Material:** Polypropylene (PP)
- **Product Dimensions:** 5"D x 5"W x 21.18"H
- **Item Weight:** 8.28 Pounds
- **External Testing Certification:** FDA
- **Product Benefits:** Removes Odor

## Images

![Pentek - 155281-43 BBF1-20MB Water Deionization Filter Cartridge, 20" x 4-1/2" - Image 1](https://m.media-amazon.com/images/I/51ZmL07wT+S.jpg)
![Pentek - 155281-43 BBF1-20MB Water Deionization Filter Cartridge, 20" x 4-1/2" - Image 2](https://m.media-amazon.com/images/I/81Nl6X4thyL.jpg)
![Pentek - 155281-43 BBF1-20MB Water Deionization Filter Cartridge, 20" x 4-1/2" - Image 3](https://m.media-amazon.com/images/I/51L0STB-d-S.jpg)
![Pentek - 155281-43 BBF1-20MB Water Deionization Filter Cartridge, 20" x 4-1/2" - Image 4](https://m.media-amazon.com/images/I/71ZZBSPbwML.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent filters. Should last long
*by G***I on January 13, 2024*

Wanted to upgrade the 10 inch filters to this and I was able to by getting the 20 inch housings and swapping some parts. I go through a lot of DI water at work and needed larger filters. We run our water through a water softener first. Then it goes through a set of GE Merlin RO filters which brings the TDS down to 11 ppm. Then the water goes through 2 of these 20 inch DI filters and then in to a storage tank. Using 3 calibrated TDS meters, we get 0 ppm. The resistivity through some machines is so high, we have to add a hint of tap water back. So it truly is DI water.

### ⭐⭐⭐⭐⭐ Used it for spot free rinse on my cars.
*by J***R on April 29, 2013*

This has worked great as a post free rinse on my cars i purchased solids parts per million counter and my water is around 180 , Once I'm done washing my car i hook up the filter and put the nozzle on a very low flow and rinse the car off "basically spot free rinse" Car comes out spotless This will hold me over until I'm able to purchase the larger spotless system.

### ⭐⭐⭐⭐⭐ I got exactly what I ordered.
*by S***. on February 17, 2021*

Arrived in perfect condition, I use these filters on CNC Laser cooling chillers.

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-06-04*