--- product_id: 253500967 title: "Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System" brand: "waterdrop" price: "HK$462" currency: HKD in_stock: true reviews_count: 13 category: "Waterdrop" url: https://www.desertcart.hk/products/253500967-waterdrop-mnr35-remineralization-filter-compatible-with-undersink-ro-system store_origin: HK region: Hong Kong --- # 9-12 months lifespan Restores essential minerals 1/4" & 3/8" quick connect tubing Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System **Brand:** waterdrop **Price:** HK$462 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your tap water to spring water status — because your health deserves the upgrade! ## Quick Answers - **What is this?** Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System by waterdrop - **How much does it cost?** HK$462 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/253500967-waterdrop-mnr35-remineralization-filter-compatible-with-undersink-ro-system) ## 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 - • **Eco-smart savings:** Save thousands on bottled mineral water and reduce plastic waste with every filter cycle. - • **Long-lasting purity:** Enjoy up to 1,100 gallons of revitalized water without frequent replacements. - • **Effortless DIY upgrade:** Tool-free quick connect fittings make installation a breeze for any under-sink RO system. - • **Health-boosting minerals:** Reintroduces calcium, magnesium, potassium, and sodium to support digestion, immunity, and vitality. - • **Spring water taste at home:** Transforms flat RO water into crisp, mineral-rich spring water with activated PCC technology. ## Overview The Waterdrop MNR35 Remineralization Filter is a premium add-on for under-sink reverse osmosis systems, designed to restore essential minerals like calcium and magnesium using advanced PCC technology. Compatible with 1/4" and 3/8" quick connect tubing, it delivers fresh, spring-like water straight from your tap for 9-12 months or up to 1,100 gallons. Easy to install and eco-friendly, it enhances water taste and supports long-term health while saving you money on bottled mineral water. ## Description Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System | 1/4" & 3/8" Quick Connect Filter for RO Water Filter, Restore Essential Minerals, 9-12 Month Lifetime, 1-Pack - desertcart.com Review: Waterdrop MNR35 Remineralization Filter, 1/4" Quick Connect Mineral Filter for Reverse Osmosis - Pros ✅ Improves taste significantly Many users report that RO water tastes "flat" before adding the MNR35 and more like spring water afterward. Reviews consistently mention a noticeable improvement in flavor. ✅ Adds minerals back to RO water The filter is designed to reintroduce minerals such as calcium, magnesium, potassium, and small amounts of sodium after the RO membrane removes most dissolved solids. ✅ Easy installation The 1/4" quick-connect fittings make installation straightforward for most under-sink RO systems. Many reviewers describe it as a simple DIY upgrade. ✅ Long filter life Rated for approximately 9–12 months or about 1,100 gallons of treated water. Review: Good flavor - Great flavor. Adds about 40ppm TDS to the RO water coming out of my membrane stage. Really helps with that harsh RO taste. It was very easy to hook up and no leaks. ## Features - [This RO remineralization filter is able to last 9-12 months] For better filtration, we suggest replacing it after 9 months - [Spring water from tap] This RO remineralization filter as an independent water filter is designed to compatible with 1/4” & 3/8" quick connect tubing. It could connect with most reverse osmosis water systems on the market or under-sink water filtration system, which let you enjoy “spring water” coming from your tap - [Mineralization] Waterdrop reverse osmosis remineralization system adopts PCC technology to activate the crystalline structure of minerals, simulates the formation mechanisms of mineral spring to activate every mineral and guarantees product’s quality. Now people can drink healthy water straight at home with a safe product - [Selected natural minerals] The RO remineralization filter selects natural materials to restore minerals like calcium, magnesium, sodium, potassium, etc. Drinking this RO mineral water will, in the long run, help avoid chronic diseases, slow down the aging process,and improve digestion and immunity - [Cost efficiently] This RO remineralization filter is able to last 9-12 months or 1,100 gallons, whichever comes first. Up to 8300 single-used bottles and $12600 spent on bottled mineral water can be saved. Please Note: The mineralized filter cannot be connected to the hot water pipe - [Easy installation] 1/4" & 3/8" quick-connect fittings, it can be easy connected and disconnected during filter change-outs. You can simply plug or unplug the tubing without any tools! You could use the remineralization filter in different ways. This filter can also be connected to refrigerators or RO water purifiers. You can also directly install it under your kitchen sink ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08DXYL81C | | Best Sellers Rank | #4,458 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #8 in Under-Sink & Countertop Filtration | | Brand | Waterdrop | | Brand Name | Waterdrop | | Customer Reviews | 4.6 out of 5 stars 1,696 Reviews | | EU Spare Part Availability Duration | 9 Months | | External Testing Certification | RoHS | | Included Components | MNR35 Remineralization Filter * 1, User Manual | | Item Dimensions D x W x H | 2.6"D x 2.6"W x 11"H | | Item Weight | 0.79 Pounds | | Manufacturer | Waterdrop | | Manufacturer Part Number | WD-MNR35 | | Manufacturer Warranty Description | 1 year manufacturer and Seller Combination | | Material | pp cotton | | Material Type | pp cotton | | Model Number | WD-MNR35 | | Number of Items | 1 | | Product Benefits | Restore Essential Minerals | | Product Dimensions | 2.6"D x 2.6"W x 11"H | | Set Name | WD-MNR35 | | Unit Count | 1.0 Count | ## Product Details - **External Testing Certification:** RoHS - **Item Weight:** 12.64 ounces - **Material:** pp cotton - **Product Benefits:** Restore Essential Minerals - **Product Dimensions:** 2.6"D x 2.6"W x 11"H ## Images ![Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System - Image 1](https://m.media-amazon.com/images/I/61VtnSk2M9L.jpg) ![Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System - Image 2](https://m.media-amazon.com/images/I/81SwJOaq0YL.jpg) ![Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System - Image 3](https://m.media-amazon.com/images/I/91JoyQLz7KL.jpg) ![Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System - Image 4](https://m.media-amazon.com/images/I/71mTFObOwqL.jpg) ![Waterdrop MNR35 Remineralization Filter Compatible with Undersink RO System - Image 5](https://m.media-amazon.com/images/I/81jqTn6p84L.jpg) ## Questions & Answers **Q: What is the source of the calcium used in your filter? Is it calcite or something else?** A: This is the answer I received from Waterdrop to a similar question: Our MNR filter includes 18 kinds of natural mineral stone materials: Subsurface rocks like Serpentine, sea pumice, Anorthite, Zinc Spinel, Bioclastic limestone, Baimo Dolomite, Magnetite, Wollastonite, Clinoptilolite, Volcanic Stone Shallow underground rock: like Kunlun Hetian Complex Rock, Marl, Clinoptilolite, Kaolin Ore, Tourmaline Deep underground rock: like Tianshan Maifan Stone, Potassium Feldspar, Basalt The above combination of stone materials is a scientific formula to simulate the environment of the best natural spring water that benefits human health. Please allow me to explain that our MNR filter includes 18 kinds of natural mineral stone materials: a. Subsurface rock like Serpentine, sea pumice, Anorthite, Zinc Spinel, Bioclastic limestone, Baimo Dolomite, Magnetite, Wollastonite, Clinoptilolite, Volcanic Stone b. Shallow underground rock: like Kunlun Hetian Complex Rock, Marl, Clinoptilolite, Kaolin Ore, Tourmaline c. Deep underground rock: like Tianshan Maifan Stone, Potassium Feldspar, Basalt The above combination of stone materials is a scientific formula to simulate the environment of the best natural spring water that benefits human health. **Q: How much will this raise the ph level? At .50gpm(waterprop to system)** A: They sell an Alkaline filter, that will raise ph more, not this one.. All these other answers are wrong, talking about tds. Tds is total dissolved solids, that is not Physical hardness(ph) tds measures minerals in water. Ph measures the acid level in water. 2 totally different things. This filter is for adding minerals back not really raising ph so you can have Alkaline water. **Q: Has anyone cut this open after use to see what remains? i couldn't tell by taste if anything is even happening. time to buy a tds tester.** A: TDS testers are a must have and are cheap. **Q: How do you know that this isnt just adding arsenic and heavy metals back into the water?** A: Hi, Thanks for your interest in our MNR filter product. Please rest assured that only beneficial mineral will be added into the filtered water, and we use natural mineral rocks as source, so there will be no heavy metal releasing into the water, thank you. If you have contacted us via email but received no reply, please check the Spam/Junk Folder first. Thank you. If you have any other inquiries, please feel free to contact us. 1-888-352-3558 Kind Regards Mia Lauren　 Customer Service Rep ## Customer Reviews ### ⭐⭐⭐⭐⭐ Waterdrop MNR35 Remineralization Filter, 1/4" Quick Connect Mineral Filter for Reverse Osmosis *by B***N on June 15, 2026* Pros ✅ Improves taste significantly Many users report that RO water tastes "flat" before adding the MNR35 and more like spring water afterward. Reviews consistently mention a noticeable improvement in flavor. ✅ Adds minerals back to RO water The filter is designed to reintroduce minerals such as calcium, magnesium, potassium, and small amounts of sodium after the RO membrane removes most dissolved solids. ✅ Easy installation The 1/4" quick-connect fittings make installation straightforward for most under-sink RO systems. Many reviewers describe it as a simple DIY upgrade. ✅ Long filter life Rated for approximately 9–12 months or about 1,100 gallons of treated water. ### ⭐⭐⭐⭐⭐ Good flavor *by A***S on July 4, 2026* Great flavor. Adds about 40ppm TDS to the RO water coming out of my membrane stage. Really helps with that harsh RO taste. It was very easy to hook up and no leaks. ### ⭐⭐⭐⭐⭐ Great for coffee *by F***O on February 2, 2026* I mainly picked this up for my coffee—everything from espresso and V60 to doing "soup" extractions with the OXO brewer. I looked around at a bunch of options and found that most remineralization filters are either too basic, adding only calcium, or they go way overboard and add too much. This one hits a great middle ground; my final TDS sits right around 30–40, which makes the water taste good without being too heavy. I also added a bypass line so I can still get pure RO water when I want to mix my own specific water recipes from scratch, giving me the best of both worlds. It’s a solid, balanced setup if you want good drinking water. ## Frequently Bought Together - Waterdrop Remineralization Under Sink Water Filtration, 1/4” Quick Connect Post Filter for RO Reverse Osmosis Filter System, Restore Essential Minerals - Waterdrop G3P600 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? - 🛒 **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.hk/products/253500967-waterdrop-mnr35-remineralization-filter-compatible-with-undersink-ro-system](https://www.desertcart.hk/products/253500967-waterdrop-mnr35-remineralization-filter-compatible-with-undersink-ro-system) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-07-21*