--- product_id: 608285974 title: "ALK35 Alkaline Undersink Water Filter, NSF/ANSI 372 Certified | 6-Month Lifetime, 1/4\" & 3/8\" Quick Connect, pH Balance and Restore Alkaline Minerals for RO Filter, Under-Sink Water Filter" brand: "waterdrop" price: "$93.05" currency: USD in_stock: true reviews_count: 10 category: "Waterdrop" url: https://www.desertcart.us/products/608285974-alk35-alkaline-undersink-water-filter-nsf-ansi-372-certified-6 store_origin: US region: United States of America --- # 6-month long-lasting filter pH 7.5-9.5 alkaline boost quick 1/4" & 3/8" install ALK35 Alkaline Undersink Water Filter, NSF/ANSI 372 Certified | 6-Month Lifetime, 1/4" & 3/8" Quick Connect, pH Balance and Restore Alkaline Minerals for RO Filter, Under-Sink Water Filter **Brand:** waterdrop **Price:** $93.05 **Availability:** βœ… In Stock ## Summary > πŸ’§ Sip Smart, Live Elevated: The Ultimate Alkaline Upgrade for Your Home ## Quick Answers - **What is this?** ALK35 Alkaline Undersink Water Filter, NSF/ANSI 372 Certified | 6-Month Lifetime, 1/4" & 3/8" Quick Connect, pH Balance and Restore Alkaline Minerals for RO Filter, Under-Sink Water Filter by waterdrop - **How much does it cost?** $93.05 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/608285974-alk35-alkaline-undersink-water-filter-nsf-ansi-372-certified-6) ## 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 - β€’ **Plug & Play Convenience:** Effortless undersink installation compatible with RO systems and refrigeratorsβ€”no plumber needed. - β€’ **Elevate Your Hydration Game:** Transform plain water into a mineral-rich elixir with advanced PCC alkaline mineralization technology. - β€’ **Certified Safety & Reliability:** NSF/ANSI 372 certification ensures pure, contaminant-free water you can trust every day. - β€’ **Sustain Wellness & Sustainability:** Enjoy 6 months of crisp, revitalizing water while reducing plastic waste and replacement hassle. - β€’ **Flavor Upgrade for Your Daily Rituals:** Enhance your coffee, tea, and workouts with perfectly balanced alkaline water that fuels vitality. ## Overview The Waterdrop ALK35 Alkaline Undersink Water Filter is a premium mineralization upgrade designed to boost your water’s pH to an optimal 7.5-9.5 while infusing essential minerals like calcium and magnesium. NSF/ANSI 372 certified for safety, it installs effortlessly with 1/4" and 3/8" quick-connect fittings, fitting seamlessly into RO systems or refrigerators. With a durable 6-month lifespan, it delivers consistently fresh, revitalizing alkaline water that enhances hydration, supports metabolism, and elevates the flavor of your beveragesβ€”all while reducing plastic bottle waste. ## Description Waterdrop ALK35 Alkaline Undersink Water Filter, NSF/ANSI 372 Certified | 6-Month Lifetime, 1/4" & 3/8" Quick Connect, pH Balance and Restore Alkaline Minerals for RO Filter, Under-Sink Water Filter - desertcart.com Review: Fresh clean taste - I’ve been very happy with the Waterdrop ALK35 filter. I added it to my reverse osmosis system to complete my water filtration process, and installation was simple, just take your time and make sure the tubing is cut clean and straight. What really impressed me is the taste. The remineralization filter adds back beneficial minerals like calcium, magnesium, sodium, and potassium, giving the water a crisp, refreshing taste that reminds me of premium bottled water. The best part is knowing I’m getting great, tasting water without constantly buying plastic bottles or worrying about microscopic nanoplastics. For me, the ALK35 was the perfect finishing touch to my RO system. Review: Works well and the water taste normal - Worked really well with Waterdrop RO systems. Easy to install and it can fit both 1/4" and 3/8" pipes. One suggestion, please do provide two 3/8" locks. It only comes with three 1/4" locks. For 3/8" fitting, two 1/4" locks and two 3/8" locks are needed. ## Features - [Mineralization Upgrade] Experience the upgrade from pure to healthful water with our innovative Alkaline Mineralization Filter, featuring the PCC technology that elevates your water's pH to an optimal 7.5-9.5, while infusing beneficial minerals for better vitality - [NSF/ANSI Certified] Ensuring safety and peace of mind, our alkaline mineral filter guarantees pure water and good match, effectively diminishing the risk of leaks. Savor the convenience of effortless access to alkaline mineral-rich water in the comfort of your home - [Revitalize Your Body] This alkaline mineral filter design to balance your body's pH for improved well-being. Enjoy a boost in metabolism and an infusion of vitality during sports. Furthermore, it enriches the flavor of your coffee and tea, taking your daily hydration to new heights of enjoyment - [Effortless Installation] Designed for hassle-free integration with RO system, undersink filter system, or refrigerator for easy installation. This water solution delivers a steady stream of healthful, mineralized water, transforming your hydration experience at home - [Long-lasting Lifespan] Achieve enduring wellness with our alkaline mineralization water filter, guaranteed for 6 months. Savor the taste of healthy, on-tap water without the hassle and cost of frequent replacements or bottled water. Embrace a sustainable choice that combines longevity and affordability ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CQ3VP9N7 | | Best Sellers Rank | #55,414 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #97 in Under-Sink & Countertop Filtration | | Brand | Waterdrop | | Brand Name | Waterdrop | | Customer Reviews | 4.4 out of 5 stars 132 Reviews | | External Testing Certification | ANSI | | Included Components | ALK35 𝐀π₯𝐀𝐚π₯𝐒𝐧𝐞 Water Filter * 1, User Manual | | Item Dimensions D x W x H | 2.6"D x 2.6"W x 11"H | | Manufacturer | Waterdrop | | Manufacturer Part Number | WD-ALK35 | | Material | 𝐌𝐒𝐧𝐞𝐫𝐚π₯𝐒𝐳𝐚𝐭𝐒𝐨𝐧 π”π©π π«πšππž; 𝐍𝐒𝐅/π€ππ’πˆ π‚πžπ«π­π’πŸπ’πžπ; π„πŸπŸπ¨π«π­π₯𝐞𝐬𝐬 𝐈𝐧𝐬𝐭𝐚π₯π₯𝐚𝐭𝐒𝐨𝐧 Material 𝐌𝐒𝐧𝐞𝐫𝐚π₯𝐒𝐳𝐚𝐭𝐒𝐨𝐧 π”π©π π«πšππž; 𝐍𝐒𝐅/π€ππ’πˆ π‚πžπ«π­π’πŸπ’πžπ; π„πŸπŸπ¨π«π­π₯𝐞𝐬𝐬 𝐈𝐧𝐬𝐭𝐚π₯π₯𝐚𝐭𝐒𝐨𝐧 See more | | Material Type | 𝐌𝐒𝐧𝐞𝐫𝐚π₯𝐒𝐳𝐚𝐭𝐒𝐨𝐧 π”π©π π«πšππž; 𝐍𝐒𝐅/π€ππ’πˆ π‚πžπ«π­π’πŸπ’πžπ; π„πŸπŸπ¨π«π­π₯𝐞𝐬𝐬 𝐈𝐧𝐬𝐭𝐚π₯π₯𝐚𝐭𝐒𝐨𝐧 | | Model Number | WD-ALK35 | | Number of Items | 1 | | Number of Packs | 1 | | Product Benefits | Increases pH level and adds essential minerals back into the water | | Product Dimensions | 2.6"D x 2.6"W x 11"H | | Set Name | WD-ALK35 | | Unit Count | 1 Count | ## Product Details - **Brand:** Waterdrop - **External Testing Certification:** ANSI - **Product Benefits:** Increases pH level and adds essential minerals back into the water - **Product Dimensions:** 2.6"D x 2.6"W x 11"H ## Images ![ALK35 Alkaline Undersink Water Filter, NSF/ANSI 372 Certified | 6-Month Lifetime, 1/4" & 3/8" Quick Connect, pH Balance and Restore Alkaline Minerals for RO Filter, Under-Sink Water Filter - Image 1](https://m.media-amazon.com/images/I/617BEVyf2tL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fresh clean taste *by T***Y on July 3, 2026* I’ve been very happy with the Waterdrop ALK35 filter. I added it to my reverse osmosis system to complete my water filtration process, and installation was simple, just take your time and make sure the tubing is cut clean and straight. What really impressed me is the taste. The remineralization filter adds back beneficial minerals like calcium, magnesium, sodium, and potassium, giving the water a crisp, refreshing taste that reminds me of premium bottled water. The best part is knowing I’m getting great, tasting water without constantly buying plastic bottles or worrying about microscopic nanoplastics. For me, the ALK35 was the perfect finishing touch to my RO system. ### ⭐⭐⭐⭐⭐ Works well and the water taste normal *by P***R on June 27, 2026* Worked really well with Waterdrop RO systems. Easy to install and it can fit both 1/4" and 3/8" pipes. One suggestion, please do provide two 3/8" locks. It only comes with three 1/4" locks. For 3/8" fitting, two 1/4" locks and two 3/8" locks are needed. ### ⭐⭐⭐⭐⭐ System worth every penny! *by K***B on August 20, 2026* Already have the under sink system - this is just another feature with minerals ## Frequently Bought Together - Waterdrop 𝐀π₯𝐀𝐚π₯𝐒𝐧𝐞 Water Filter WD-ALK35, Alkaline Filter for Reverse Osmosis System, pH Balance and Restore Minerals for RO Alkaline Filter, Under Sink Water Filter, 1/4" Quick Connect - Waterdrop G3 Reverse Osmosis System, 8 Stage Tankless Reverse Osmosis Water Filter, NSF/ANSI 42 & 58 & 372 Certified, Under Sink RO System, 2:1 Pure to Drain, Smart LED Faucet - Waterdrop G3 Replacement Filter 1-Year Combo, Pack of 2 WD-G3-CF Filters and 1 WD-G3-CB Filter, Replacement for WD-G3-W, WD-G3P600 and WD-G3P800-W Reverse Osmosis System --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/608285974-alk35-alkaline-undersink-water-filter-nsf-ansi-372-certified-6](https://www.desertcart.us/products/608285974-alk35-alkaline-undersink-water-filter-nsf-ansi-372-certified-6) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-02*