--- product_id: 11549116 title: "Pentair Pentek BBF1-20MB Big Blue 20\" x 4.5\" Deionization Cartridge" brand: "pentek" price: "$466.38" currency: USD in_stock: true category: "Pentek" url: https://www.desertcart.us/products/11549116-pentair-pentek-bbf1-20mb-big-blue-20-x-4-5 store_origin: US region: United States of America --- # 16 megohm ultra-pure water Fits all 20" Big Blue housings 1,850 grain high capacity Pentair Pentek BBF1-20MB Big Blue 20" x 4.5" Deionization Cartridge **Brand:** pentek **Price:** $466.38 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your water purity game—because your projects deserve nothing less! ## Quick Answers - **What is this?** Pentair Pentek BBF1-20MB Big Blue 20" x 4.5" Deionization Cartridge by pentek - **How much does it cost?** $466.38 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/11549116-pentair-pentek-bbf1-20mb-big-blue-20-x-4-5) ## 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 - • **Cost-Effective Purity:** Low TOC resin minimizes organic contaminants while maximizing value for demanding applications. - • **Robust & Reliable Build:** Durable polypropylene shell with Buna-N gaskets ensures a secure, leak-free seal under pressure. - • **Universal Compatibility:** Seamlessly fits all standard 20" Big Blue housings—upgrade without hassle. - • **Long-Lasting Performance:** High 1,850 grain capacity means fewer replacements and more uptime in critical operations. - • **Ultra-Pure Water, Every Time:** Delivers semiconductor-grade deionization up to 16 megohms for flawless lab and industrial use. ## Overview The Pentair Pentek BBF1-20MB is a 20" x 4.5" high-capacity deionization cartridge featuring semiconductor-grade mixed bed resin. It produces ultra-pure water with resistivity up to 16 megohms, ideal for pharmaceutical, medical, cosmetic, and electronics industries. With a 1,850 grain capacity and compatibility with all standard 20" Big Blue housings, it offers cost-effective, long-lasting performance with low total organic carbon levels and durable construction. ## 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. ## 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 | #89,074 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #793 in Filters & Filter Media | | Brand Name | Pentek | | Customer Reviews | 4.4 4.4 out of 5 stars (54) | | 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 | 8.3 pounds | | Manufacturer | Pentair Industries | | Manufacturer Part Number | 155281-44 | | Material Type | Polypropylene (PP) | | Model Number | BBF-20MB | | Number of Items | 1 | | Product Benefits | Removes Odor | | UPC | 051678281031 | | Unit Count | 1 Count | ## Product Details - **External Testing Certification:** FDA - **Item Weight:** 8.3 pounds - **Material:** Polypropylene (PP) - **Product Benefits:** Removes Odor - **Product Dimensions:** 5"D x 5"W x 21.18"H ## Images ![Pentair Pentek BBF1-20MB Big Blue 20" x 4.5" Deionization Cartridge - Image 1](https://m.media-amazon.com/images/I/51ZmL07wT+S.jpg) ![Pentair Pentek BBF1-20MB Big Blue 20" x 4.5" Deionization Cartridge - Image 2](https://m.media-amazon.com/images/I/81Nl6X4thyL.jpg) ![Pentair Pentek BBF1-20MB Big Blue 20" x 4.5" Deionization Cartridge - Image 3](https://m.media-amazon.com/images/I/51L0STB-d-S.jpg) ![Pentair Pentek BBF1-20MB Big Blue 20" x 4.5" Deionization Cartridge - Image 4](https://m.media-amazon.com/images/I/71ZZBSPbwML.jpg) ## Available Options This product comes in different **Size, Style** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/11549116-pentair-pentek-bbf1-20mb-big-blue-20-x-4-5](https://www.desertcart.us/products/11549116-pentair-pentek-bbf1-20mb-big-blue-20-x-4-5) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-14*