--- product_id: 142628826 title: "POOLPURE PRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack" brand: "poolpure" price: "€ 41.70" currency: EUR in_stock: true reviews_count: 13 category: "Poolpure" url: https://www.desertcart.ie/products/142628826-poolpure-prb25-in-hot-tub-filter-replace-unicel-c-4326 store_origin: IE region: Ireland --- # 13.3-inch length for perfect fit 25 sq.ft trilobal filtration area NSF/ANSI 50 certified safe materials POOLPURE PRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack **Brand:** poolpure **Price:** € 41.70 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your spa game with the filter that works as hard as you do! ## Quick Answers - **What is this?** POOLPURE PRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack by poolpure - **How much does it cost?** € 41.70 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/142628826-poolpure-prb25-in-hot-tub-filter-replace-unicel-c-4326) ## Best For - poolpure enthusiasts ## Why This Product - Trusted poolpure brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last 30% Longer:** Heavy-duty polyester fabric and reinforced core reduce replacements. - • **Ultra-Fine 50-Micron Filtration:** Captures 99% of fine particles like hair, dust & sand for sparkling water. - • **Crystal-Clear Clarity, All Day Long:** Trilobal fiber design triples dirt adsorption for pristine water. - • **Effortless Maintenance, Maximum Savings:** Patented dirt-locking tech releases debris easily, cutting cleaning time. - • **Trusted by Millions, Certified for Safety:** NSF/ANSI 50 certified and used by over 5 million pool owners worldwide. ## Overview The POOLPURE PLFPRB25-IN is a premium 5x13-inch hot tub filter featuring a 25 sq.ft trilobal filtration fabric that captures fine particles down to 50 microns. Certified NSF/ANSI 50 for safety, it offers durable construction with reinforced end caps and a core that lasts 30% longer than standard filters. Compatible with multiple major brands, it ensures crystal-clear, safe water with minimal maintenance, trusted by millions of pool and spa owners. ## Description desertcart.com : POOLPURE PLFPRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack : Patio, Lawn & Garden Review: Great value!! - Have been using for a month and a half now. Water in hot tub is clear and stable. What a deal! Review: Good, long lasting filter - We’ve been using this filter for a while now. It lasts several months and holds up well. It has helped to keep our hot tub much clearer/cleaner than others we’ve used. ## Features - 🍀Specifications: Length: 13 5/16”; Outside Diameter: 5”; Top Hole: 2 1/8”; Bottom Hole: 2 1/8”; Filtration Area: 25 Sq.ft; Filter Material: Trilobal Filtration Fabric. - 🍀Compatible Models: PLFPRB25-IN Pool Filter is compatible with PRB25-IN, Unicel C-4326, Filbur FC-2375, FC-2370, SD-00196, 303909, M-4326, 8172500, R173429. ★NOTE: This is a compatible replacement. Original manufacturers' names and part numbers are for reference only. POOLPURE stands as an independent brand. - 🍀 NSF/ANSI 50 Certified Safety: PoolPure pool and spa filters are tested and certified by IAPMO against NSF/ANSI 50 standards for material safety. All components are proven safe for long-term water exposure, ensuring no harmful substances are released. Trusted by over 5 million pool owners, PoolPure delivers cleaner, safer pool and spa water for your family. - 🍀Trilobal Filtration Fabric Design: The innovative trilobal fiber structure provides three times the adsorption surface area compared to conventional filter fabrics. It captures more dirt and sediment while maintaining consistent water clarity, even under frequent use—so you can enjoy crystal-clear water all day long. - 🍀Patented Dirt-Locking Technology: Our exclusive dirt-locking structure efficiently captures debris and makes cleaning effortless. During rinsing, trapped dirt is released easily and thoroughly. The filter is simple to rinse, reusable, and significantly reduces both maintenance time and costs. - 🍀50-Micron Fine Filtration: Upgraded with a 50-micron high-efficiency filtration layer, it effectively removes up to 99% of fine particles such as hair, leaves, dust, and sand. It keeps pool water sparkling clear for longer, reducing the need for frequent water changes and chemical use—saving you both time and money. - 🍀Durable Heavy-Duty Construction: Made with 4 oz. thickened polyester filter fabric, reinforced ABS end caps, and a strengthened integrated core, this filter lasts over 30% longer than standard cartridges. It reduces replacement frequency and long-term maintenance costs, delivering greater value over time. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07MTBTZSV | | Best Sellers Rank | #5,698 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #31 in Hot Tub Accessories | | Customer Reviews | 4.8 4.8 out of 5 stars (3,681) | | Is Discontinued By Manufacturer | No | | Item Weight | 1.3 pounds | | Item model number | PLFPRB25-IN | | Manufacturer | POOLPURE | | Package Dimensions | 13.86 x 5.31 x 5.28 inches | ## Images ![POOLPURE PRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack - Image 1](https://m.media-amazon.com/images/I/81Si37ZvFjL.jpg) ![POOLPURE PRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack - Image 2](https://m.media-amazon.com/images/I/71pNG35vj+L.jpg) ![POOLPURE PRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack - Image 3](https://m.media-amazon.com/images/I/71uGtPHsCdL.jpg) ![POOLPURE PRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack - Image 4](https://m.media-amazon.com/images/I/71bUFAKsCkL.jpg) ![POOLPURE PRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack - Image 5](https://m.media-amazon.com/images/I/61I54X1bGbL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Are these filters washable?** A: Hello, Yes they are washable. We suggest to rinse your hot tub filters with clean water every week, this will help remove debris and protect your filter material. under regular washings, hot tub filters will work more efficiently and last longer. **Q: This is the same dimension as my oem filter, but why my oem filter listed at 50 sq.ft, while this filter is listed at 25 sq.ft?** A: Hello edward m, PLFPRB50-IN is 50 sq.ft. , while PLFPRB25-IN is 25 sq.ft. Both filters are in the same size. For PLFPRB50-IN, please refer to this link: https://www.amazon.com/dp/B07MTDB8KB, thank you! **Q: Is this replacement filter compatible with rainbow dynamic rtl-rcf 25qf?** A: Yes, PLFPRB25-IN will replace Rainbow Dynamic 25. To make sure it fits your spa, we suggest to measure your old filter then compare with the specification. A slightly variance is acceptable. The filter size: Width: 5" Height: 13 5/16" Top: Open 2 1/8" Bottom: Open 2 1/8" Sq Ft: 25 sq ft **Q: will this work on a sundance optima 850?** A: Dear customer, Thank you for your question, The filter you asked DOES NOT fit sundance optima 850. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great value!! *by F***E on March 15, 2026* Have been using for a month and a half now. Water in hot tub is clear and stable. What a deal! ### ⭐⭐⭐⭐⭐ Good, long lasting filter *by K***E on February 19, 2026* We’ve been using this filter for a while now. It lasts several months and holds up well. It has helped to keep our hot tub much clearer/cleaner than others we’ve used. ### ⭐⭐⭐⭐⭐ Hot tub filter *by B***B on February 7, 2026* Perfect fit ## Frequently Bought Together - POOLPURE PLFPRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack - FROG @Ease Replacement SmartChlor Cartridge for use with Hot Tub FROG @Ease Floating System - Hot Tub Sanitizer System Supports Less Chlorine Use - 3 Pack - FROG @Ease Floating System for Hot Tubs - Quick & Easy Self-Regulating Hot Tub Sanitizer - Hot Tub Maintenance System with Sanitizing Minerals & SmartChlor Technology --- ## 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.ie/products/142628826-poolpure-prb25-in-hot-tub-filter-replace-unicel-c-4326](https://www.desertcart.ie/products/142628826-poolpure-prb25-in-hot-tub-filter-replace-unicel-c-4326) --- *Product available on Desertcart Ireland* *Store origin: IE* *Last updated: 2026-05-23*