---
product_id: 6328757
title: "Pentair Pentek WS-20BB, 20\" Big Blue Water Softener Cartridge, 20\" x 4.5\""
brand: "pentek"
price: "22757 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/6328757-pentair-pentek-ws-20bb-20-big-blue-water-softener-cartridge
store_origin: IS
region: Iceland
---

# 20" x 4.5" size 4,500 grain capacity Fits all Big Blue housings Pentair Pentek WS-20BB, 20" Big Blue Water Softener Cartridge, 20" x 4.5"

**Brand:** pentek
**Price:** 22757 kr
**Availability:** ✅ In Stock

## Summary

> 💦 Soft water, hard results! Experience the difference.

## Quick Answers

- **What is this?** Pentair Pentek WS-20BB, 20" Big Blue Water Softener Cartridge, 20" x 4.5" by pentek
- **How much does it cost?** 22757 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/6328757-pentair-pentek-ws-20bb-20-big-blue-water-softener-cartridge)

## 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

- • **Efficient Design:** Maximize ion exchange with optimal water-resin contact.
- • **Protect Your Equipment:** Safeguard sensitive water delivery systems with softened water.
- • **Universal Compatibility:** Seamlessly fits all 20" Big Blue and heavy-duty housings.
- • **Long-lasting Performance:** Enjoy up to 4,500 grains of capacity for extended use.
- • **Ultimate Hardness Reduction:** Transform your water quality with sodium-based softening resin.

## Overview

The Pentair Pentek WS-20BB is a 20" x 4.5" water softener cartridge designed to effectively reduce hardness, minerals, and scale deposits. With a 4,500 grain capacity and a sodium-based softening resin, it fits all standard Big Blue housings, ensuring optimal performance and protection for your water delivery systems.

## Description

Pentair Pentek WS-20BB, 20" Big Blue Water Softener Cartridge, 20" x 4.5"

## Features

- CARTRIDGES USE a sodium based, non-solvent rinsed softening resin to reduce hardness, minerals and scale deposits in low flow rate applications
- FITS ALL 20" Big Blue or other heavy duty housings and can replace any 20" x 4.5" water softener cartridge
- CARTRIDGE STYLE DESIGN PROVIDES A CONVENIENT SOLUTION for delivering softened water to protect sensitive water delivery equipment
- DESIGNED TO ALLOW OPTIMAL CONTACT between water and resin surfaces, ensuring maximum ion exchange
- 4,500 GRAIN CAPACITY. Cartridge utilizes single-use resin technologies for maximum life grains capacity

## Product Details

- **Material:** Cation Resin
- **Product Dimensions:** 4.5"D x 4.5"W x 20"H
- **Item Weight:** 9.7 Pounds
- **External Testing Certification:** FDA
- **Product Benefits:** Reduces hardness, minerals, and scale deposits in low flow rate applications; Protects sensitive water delivery equipment; Provides superior protection for medical equipment, coffee and espresso appliances, beverage and food service machines

## Images

![Pentair Pentek WS-20BB, 20" Big Blue Water Softener Cartridge, 20" x 4.5" - Image 1](https://m.media-amazon.com/images/I/41szp0fveqL.jpg)

## Available Options

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

## Frequently Bought Together

- Pentair Pentek WS-20BB, 20" Big Blue Water Softener Cartridge, 20" x 4.5"
- Pentair Pentek EPM-10 Carbon Water Filter, 10-Inch, Under Sink Modified Epsilon Carbon Block Replacement Cartridge with Bonded Powdered Activated Carbon (PAC) Filter, 10" x 2.5", 10 Micron
- Pentair Pentek CBC-20BB Big Blue Carbon Water Filter, 20-Inch, Whole House Carbon Block Replacement Cartridge with Bonded Powdered Activated Carbon (PAC) Filter, 20" x 4.5", 0.5 Micron

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**Shop now:** [https://www.desertcart.is/products/6328757-pentair-pentek-ws-20bb-20-big-blue-water-softener-cartridge](https://www.desertcart.is/products/6328757-pentair-pentek-ws-20bb-20-big-blue-water-softener-cartridge)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-06*