--- product_id: 223866737 title: "Waterdrop AP431 Replacement Cartridge for Aqua-Pure® AP431, 1 Pack" brand: "waterdrop" price: "S$61" currency: SGD in_stock: true category: "Waterdrop" url: https://www.desertcart.sg/products/223866737-waterdrop-ap431-replacement-cartridge-for-aqua-pure-ap431-1-pack store_origin: SG region: Singapore --- # 6-month extended lifespan 10 GPM fast flow rate BPA-free anti-burst housing Waterdrop AP431 Replacement Cartridge for Aqua-Pure® AP431, 1 Pack **Brand:** waterdrop **Price:** S$61 **Availability:** ✅ In Stock ## Summary > 💧 Keep your water flowing smooth and your appliances thriving—because scale is so last season! ## Quick Answers - **What is this?** Waterdrop AP431 Replacement Cartridge for Aqua-Pure® AP431, 1 Pack by waterdrop - **How much does it cost?** S$61 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/223866737-waterdrop-ap431-replacement-cartridge-for-aqua-pure-ap431-1-pack) ## Best For - waterdrop enthusiasts ## Why This Product - Trusted waterdrop brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Consistent High Flow:** Delivers up to 10 gallons per minute at stable pressure, meeting all your household water needs without compromise. - • **Leak-Free Confidence:** Food-grade BPA-free plastic housing ensures a perfect fit with zero leaks—safe, reliable, and hassle-free. - • **Seamless Compatibility:** Direct replacement for 3M Aqua-Pure AP431 and related models—upgrade without the guesswork. - • **Long-Lasting Performance:** Replace every 6 months for peak scale inhibition and continuous protection tailored to your water conditions. - • **Protect Your Appliances Like a Pro:** Premium polyphosphates prevent corrosion & limescale buildup, extending the life of your dishwasher, heater, and more. ## Overview The Waterdrop AP431 Replacement Cartridge is a premium scale inhibitor designed to protect water-using appliances by preventing corrosion and limescale buildup. Featuring BPA-free, anti-burst housing and delivering a fast flow rate of up to 10 GPM, it ensures safe, efficient water filtration. Compatible with multiple 3M Aqua-Pure models, this cartridge offers a reliable 6-month lifespan for consistent performance and peace of mind. ## Description desertcart.com: Waterdrop AP431 Replacement Cartridge for Aqua-Pure® AP431, 1 Pack | Hot Water Scale Inhibitor for Aqua-Pure® AP430SS, Prevent Scale Accumulation and Protect Water Heaters : Tools & Home Improvement ## Features - 【Protects your water-using appliances】: With the premium polyphosphates in this scale inhibitor cartridge, you can worry less about the accumulation of corrosion and limescale, which may block your pipelines. This efficient filter media will keep your water-using appliances—like dishwashers, heaters, etc.—working optimally and for the longest time possible. - 【Anti-burst properties】: The cartridge housing is made from food-grade BPA-free plastic and fits the original brand perfectly, without any leaks. With its state-of-the-art technology, the scale inhibitor cartridge ensures a safe water use experience. - 【Fast water flow】: With a continuous flow of filtered water at a stable pressure and a flow rate of up to 10 gpm, this scale inhibitor cartridge is designed to provide water for your domestic requirements. - 【Extended lifespan】: Enjoy clean water by replacing your cartridge every 6 months, which will vary based on water conditions. Throughout this time frame, you will get maximum performance. - 【Replacement models】: Replacement for 3M Aqua-Pure AP430, AP430SS, and SF18-S Scale Inhibition System. Interchangeable with 3M Aqua-Pure AP431, HF8-S, KleenWater KW431 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B089W9TSJG | | Best Sellers Rank | #15,977 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #107 in Replacement Under-Sink Water Filters | | Brand Name | Waterdrop | | Compatible Water Purifier Models | 3M SF18-S | | Customer Reviews | 4.6 4.6 out of 5 stars (1,116) | | External Testing Certification | RoHS | | Included Components | Scale Inhibitor Cartridge*1 | | Item Dimensions D x W x H | 2.56"D x 2.56"W x 9.45"H | | Item Highlight | Hot Water Scale Inhibitor for Aqua-Pure® AP430SS, Prevent Scale Accumulation and Protect Water Heaters | | Item Weight | 16 ounces | | Manufacturer | Waterdrop | | Manufacturer Part Number | WD-AP431 | | Material Type | food-grade polyphosphates | | Model Number | WD-W65 | | Number of Items | 1 | | Number of Packs | 1 | | Product Benefits | Inhibits Lime-Scale Growth | | Set Name | Aqua-Pure AP431 | | UPC | 840814177495 | | Unit Count | 1 Count | ## Product Details - **External Testing Certification:** RoHS - **Item Weight:** 16 ounces - **Material:** food-grade polyphosphates - **Product Benefits:** Inhibits Lime-Scale Growth - **Product Dimensions:** 2.56"D x 2.56"W x 9.45"H ## Images ![Waterdrop AP431 Replacement Cartridge for Aqua-Pure® AP431, 1 Pack - Image 1](https://m.media-amazon.com/images/I/5140+mcg8XL.jpg) ![Waterdrop AP431 Replacement Cartridge for Aqua-Pure® AP431, 1 Pack - Image 2](https://m.media-amazon.com/images/I/318igNS6LpL.jpg) ![Waterdrop AP431 Replacement Cartridge for Aqua-Pure® AP431, 1 Pack - Image 3](https://m.media-amazon.com/images/I/41U6AAFSVrL.jpg) ![Waterdrop AP431 Replacement Cartridge for Aqua-Pure® AP431, 1 Pack - Image 4](https://m.media-amazon.com/images/I/416MhyZy1CL.jpg) ![Waterdrop AP431 Replacement Cartridge for Aqua-Pure® AP431, 1 Pack - Image 5](https://m.media-amazon.com/images/I/41zal+Fg3gL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - Waterdrop AP431 Replacement Cartridge for Aqua-Pure AP431 Hot Water Scale Inhibitor for AP430SS, Prevent Scale Accumulation and Protect Water Heaters, Pack of 1 - Waterdrop AP431 AP430SS Whole House Scale Inhibitor Filter, Heater Softener System, Prevent Scale Build Up On Hot Water Heaters, Pipes and Boilers - Waterdrop AP431 Replacement Cartridge for Aqua-Pure AP431 Hot Water Scale Inhibitor for AP430SS, Prevent Scale Accumulation and Protect Water Heaters, Pack of 3 --- ## 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.sg/products/223866737-waterdrop-ap431-replacement-cartridge-for-aqua-pure-ap431-1-pack](https://www.desertcart.sg/products/223866737-waterdrop-ap431-replacement-cartridge-for-aqua-pure-ap431-1-pack) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-11-10*