--- product_id: 180744838 title: "PH100 Alkaline Reverse Osmosis Water Filter System, pH+ Remineralization 6-Stage Under Sink RO Drinking Water Filtration System 100 GPD Fast Flow 1:1 Pure to Waste Ratio, US Made Filters" brand: "ispring" price: "$U40270" currency: UYU in_stock: true reviews_count: 8 category: "I Spring" url: https://www.desertcart.uy/products/180744838-ph100-alkaline-reverse-osmosis-water-filter-system-ph-remineralization-6 store_origin: UY region: Uruguay --- # 100 GPD fast flow capacity 1:1 pure to waste water ratio 6-stage US-made filtration system PH100 Alkaline Reverse Osmosis Water Filter System, pH+ Remineralization 6-Stage Under Sink RO Drinking Water Filtration System 100 GPD Fast Flow 1:1 Pure to Waste Ratio, US Made Filters **Brand:** ispring **Price:** $U40270 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your hydration game with pure, fast, and fresh alkaline water! ## Quick Answers - **What is this?** PH100 Alkaline Reverse Osmosis Water Filter System, pH+ Remineralization 6-Stage Under Sink RO Drinking Water Filtration System 100 GPD Fast Flow 1:1 Pure to Waste Ratio, US Made Filters by ispring - **How much does it cost?** $U40270 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/180744838-ph100-alkaline-reverse-osmosis-water-filter-system-ph-remineralization-6) ## Best For - ispring enthusiasts ## Why This Product - Trusted ispring brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Fast Flow, Less Waste:** 100 gallons per day with an industry-leading 1:1 pure to waste ratio—eco-friendly meets efficiency. - • **Pure Powerhouse Filtration:** Removes 99%+ of 1,000+ contaminants including lead, PFAS & chlorine for crystal-clear hydration. - • **Effortless DIY Installation:** Quick push-to-connect fittings and clear see-through housing make setup and filter changes a breeze. - • **Trusted US Quality & Support:** Built with premium US-made filters and backed by lifetime support—join thousands upgrading their home water. - • **Alkaline Boost for Better Taste:** 6-stage remineralization restores healthy minerals, balancing pH for refreshing, great-tasting water. ## Overview The iSpring PH100 is a US-made, 6-stage under-sink reverse osmosis water filtration system delivering 100 gallons per day of alkaline water with a 1:1 pure to waste ratio. It removes over 99% of contaminants including lead and PFAS, while its remineralization stage restores healthy minerals for balanced pH and superior taste. Designed for easy DIY installation with durable components and backed by lifetime support, it offers a sustainable alternative to bottled water for health-conscious professionals. ## Description iSpring PH100 Alkaline Reverse Osmosis Water Filter System, pH+ Remineralization 6-Stage Under Sink RO Drinking Water Filtration System 100 GPD Fast Flow 1:1 Pure to Waste Ratio, US Made Filters - desertcart.com Review: American Company, Quality Product, Exemplary Service - I purchased this cartridge from desertcart and encountered a small issue (a missing piece that didn’t affect functionality). I reached out to iSpring support and was pleasantly surprised to receive a prompt response from a real person—thank you, Nick—for quickly and professionally taking care of it. Responsive, after-the-sale support like this is becoming increasingly rare. When a company says it’s U.S.-based and that commitment shows clearly in its customer service, it really inspires confidence. This experience confirmed that I received exactly what I was looking for. As for the cartridge itself, it appears well-made and performs exactly as advertised. Starting with 0 ppm input water, my readings consistently range from 11 to 14 ppm. Installation and use were incredibly straightforward—honestly, writing this review took more time than setting it up. Best of all, I’m very happy with the water's taste. I am highly satisfied with both the product and the support. Review: Great RO System, great support! - Model: 100gpd, ph+ Despite being packaged well, a fitting was broken off inside one of the filters. I was able to get it out though. Customer service answered on my first call and expedited new parts. Thank you Nick! There are a few other things worth mentioning here. The included “leak stop device” is made for 1/4 inch hoses and my hardware didn’t have 3/8 to 1/4 elbows. You can find a 3/8 x 3/8 leak stop on desertcart for around $15 if you’re concerned about water flow. The included filters (4,5 & 6) also have 3/8 x 1/4 inch inlets. I ordered the filter package shown with the plus sign next to the system on desertcart and they were not the US made ones. Not sure what the difference is (other than price) as they both seem to be 1/4 inch inlets. FK-US for US made ones. Currently they are out of stock. The system seems well designed and comes partially assembled including a water saving ASO valve. Particularly like the clear housing on stage one. It allowed me to see that the installed filter was wrapped in plastic which they all are, so be aware as it’s not mentioned in the instructions. Love the filter wrench which is easy to use due to the filter housing taper. Metal mounting frame is a plus. I was trying to connect the poly tube to cpvc and had issues with different threads so wound up using compression fittings for the 3/8 inlet and pot filler lines. There is a nice bag of extra parts but mostly for 1/4 inch systems. Despite numerous connections, no leaks! Pressure is good and waste water minimal. Taste is like spring water. I would suggest someone re-evaluate the included parts and make sure needed fittings are there. Looking to save some $$ between pitcher and I/M filter cost. I’d recommend this system without any hesitation at this point. ## Features - HIGH-QUALITY US MADE FILTERS - The PH100 RO Water Filter System features top-quality US-made filters and a Dupont RO membrane for exceptional durability and performance. This advanced under-sink reverse osmosis system removes up to 99% of over 1,000 contaminants, including PFAS, lead (up to 98% removal), chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more.For the ice maker water line, please search "B09MV3SNT3". - FAST FLOW & LESS WASTE WATER - 100 GPD, the alkaline Reverse Osmosis system is up to 1:1 pure to waste water ratio. Enjoy crystal clear ice cubes, coffee, baby formula – even better than most bottled water. With upgraded 3/8” fast flow input and output design, the Reverse Osmosis water filter increases flow rate that produces clean, fresh, safe water. The entire alkaline 6 stage RO system fits under a standard kitchen sink. - GREAT TASTING ALKALINE WATER - The RO membrane of the under sink Reverse Osmosis water filter system removes not only harmful pollutants but also a few helpful minerals. A standard 5 stage under sink RO system produces slightly acidic water with a pH of 7. 0 or below. This Reverse Osmosis water filter includes an additional 6 stage - an Alkaline Remineralization filter which restores healthy minerals and produces a balanced alkalinity, making water taste better. - EASY TO INSTALL & CHANGE FILTERS - Easy, Do-It-Yourself installation, typically in a couple of hours with knowledgeable technical support just a phone call away. Extra tool sets are included in the RO water filter system. Comes with clear manual and installation videos. For leak-free installation, simply push tubing ½ inch deep into quick-fitting connectors and lock, no threading pipes needed. Clear see-through 1st stage housing makes filter inspection a snap. - 100% CUSTOMER SATISFACTION - Backed by a 1-year Manufacturer with lifetime support from Atlanta, GA USA. Features a beautiful European-designed brushed nickel all-metal faucet. For the US Made replacement reverse osmosis filters, please search “F9KUS” or “F19K100US”. This alkaline water filter system is to deliver endless bottled quality drinking water right in your home for many years to come, eliminating plastic bottles. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0844HF76N | | Best Sellers Rank | #222,869 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #443 in Under-Sink & Countertop Filtration | | Brand | iSpring | | Brand Name | iSpring | | Customer Reviews | 4.3 out of 5 stars 589 Reviews | | Included Components | housings, filters, parts and tubings, faucet, mounting bracket | | Item Type Name | Top Quality 6-Stage Under Sink Reverse Osmosis RO Drinking Water Filtration System 100 GPD Fast Flow 1:1 Pure to Waste Ratio with Alkaline Remineralization, US Made Filters | | Item Weight | 0.01 Ounces | | Manufacturer | iSpring Water Systems | | Manufacturer Part Number | PH100 | | Material | Acrylonitrile Butadiene Styrene (ABS), Plastic, Polyethylene (PE), Polypropylene (PP), Polystyrene | | Material Type | Acrylonitrile Butadiene Styrene (ABS), Plastic, Polyethylene (PE), Polypropylene (PP), Polystyrene | | Model Number | PH100 | | Number of Items | 1 | | UPC | 810004170216 | ## Product Details - **Brand:** iSpring - **Item Weight:** 0.01 Ounces - **Material:** Acrylonitrile Butadiene Styrene (ABS), Plastic, Polyethylene (PE), Polypropylene (PP), Polystyrene - **Number of Items:** 1 - **UPC:** 810004170216 ## Images ![PH100 Alkaline Reverse Osmosis Water Filter System, pH+ Remineralization 6-Stage Under Sink RO Drinking Water Filtration System 100 GPD Fast Flow 1:1 Pure to Waste Ratio, US Made Filters - Image 1](https://m.media-amazon.com/images/I/71rRxWRMI8L.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: What is the difference between rcc7ak and ph100 other than difference in a pure to waste ratio and gpd capacity?** A: The reason I went with the RO100 (brother to the PH100, except doesn't have the Alkaline final filter) was the Dow Filmtec RO membrane. I have a friend who uses a high-end RO filter for his large aquarium. He recommended the Filmtec RO membrane (this is the same membrane he has) at a much lower cost than the high-end RO filters. The RCC7AK uses the iSpring RO membrane. While it might be just as good as the Filmtec, I'm going with the name brand reputable RO membrane for about the same price. The main difference between this (PH100/RO100) and the high end RO filter is the high-end filters use 1 micron carbon filters whereas the iSpring is a 5 micron carbon filter. My friends' need is to remove all chlorine from the aquarium water and you need the 1 micron filters to do that, per my friend... I'm super satisfied with the RO100. **Q: where do you get replacement filters for ispring ph100?** A: Hello, We apologize for the inconvenience, we will have them available by late April. **Q: In one of the bags there is a piece of angled plastic and three wood screws what does this go to?** A: Hi Evan, The screws are for mounting the system in your under sink wall. Some install them in wooden walls or use a piece of wood when mounting so we include those screws as well. Please reach out to our customer service team if you need further assistance. We're always ready to help. iSpring Water Systems, LLC **Q: Hello What is the drain flow rate valve 300? (Note it is printed on the side of the valve)** A: Hi, The drain flow rate is 300 mL per minute. If you have any questions or need additional assistance, please contact us at support@123filter.com or call us at (678) 261-7611. Thanks, iSpring Water Systems, LLC ## Customer Reviews ### ⭐⭐⭐⭐⭐ American Company, Quality Product, Exemplary Service *by L***B on January 17, 2026* I purchased this cartridge from Amazon and encountered a small issue (a missing piece that didn’t affect functionality). I reached out to iSpring support and was pleasantly surprised to receive a prompt response from a real person—thank you, Nick—for quickly and professionally taking care of it. Responsive, after-the-sale support like this is becoming increasingly rare. When a company says it’s U.S.-based and that commitment shows clearly in its customer service, it really inspires confidence. This experience confirmed that I received exactly what I was looking for. As for the cartridge itself, it appears well-made and performs exactly as advertised. Starting with 0 ppm input water, my readings consistently range from 11 to 14 ppm. Installation and use were incredibly straightforward—honestly, writing this review took more time than setting it up. Best of all, I’m very happy with the water's taste. I am highly satisfied with both the product and the support. ### ⭐⭐⭐⭐⭐ Great RO System, great support! *by D***W on April 26, 2022* Model: 100gpd, ph+ Despite being packaged well, a fitting was broken off inside one of the filters. I was able to get it out though. Customer service answered on my first call and expedited new parts. Thank you Nick! There are a few other things worth mentioning here. The included “leak stop device” is made for 1/4 inch hoses and my hardware didn’t have 3/8 to 1/4 elbows. You can find a 3/8 x 3/8 leak stop on Amazon for around $15 if you’re concerned about water flow. The included filters (4,5 & 6) also have 3/8 x 1/4 inch inlets. I ordered the filter package shown with the plus sign next to the system on Amazon and they were not the US made ones. Not sure what the difference is (other than price) as they both seem to be 1/4 inch inlets. FK-US for US made ones. Currently they are out of stock. The system seems well designed and comes partially assembled including a water saving ASO valve. Particularly like the clear housing on stage one. It allowed me to see that the installed filter was wrapped in plastic which they all are, so be aware as it’s not mentioned in the instructions. Love the filter wrench which is easy to use due to the filter housing taper. Metal mounting frame is a plus. I was trying to connect the poly tube to cpvc and had issues with different threads so wound up using compression fittings for the 3/8 inlet and pot filler lines. There is a nice bag of extra parts but mostly for 1/4 inch systems. Despite numerous connections, no leaks! Pressure is good and waste water minimal. Taste is like spring water. I would suggest someone re-evaluate the included parts and make sure needed fittings are there. Looking to save some $$ between pitcher and I/M filter cost. I’d recommend this system without any hesitation at this point. ### ⭐⭐⭐⭐⭐ Great system, Better service! *by D***. on September 24, 2025* I ordered this RO100 unit in 2021 although I didn't get to install until after a remodel in 2023. So I feel I can give an honest 2 year review. So far I am very happy with the quality and taste of our water. The local supply switched over to chloramine vs chlorine years ago and that made our water impossible to use for coffee, and I always just considered it the norm to use a bulk RO supplier for drinking and coffee water. Yes, it was a pain to go refill 3x4 gallon containers at a time so I checked out iSpring due to the good reviews. All went fine with the installation(garage) and I am a few filter changes in. I did have an issue recently with the main feed valve not closing completely, making the last filter change a bit tricky, so I called iSpring's help line and explained my issue to Nick. He assured me he is sending out a replacement. Now that's service after the sale! I am looking forward to many more years of quality production of RO water and great service. Thanks again Nick for taking care of me! ## Frequently Bought Together - iSpring PH100 Alkaline Reverse Osmosis Water Filter System, pH+ Remineralization 6-Stage Under Sink RO Drinking Water Filtration System 100 GPD Fast Flow 1:1 Pure to Waste Ratio, US Made Filters - iSpring ICEK Ultra Safe Fridge Water Line Connection and Ice Maker Installation Kit for Reverse Osmosis RO Systems & Water Filters, 1/4", 20 feet - iSpring F9K 1-Year Reverse Osmosis Water Filter Replacement Cartridge Pack w/Alkaline Remineralization Filters for 6-Stage RO Filtration Systems, Without RO Membrane --- ## 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.uy/products/180744838-ph100-alkaline-reverse-osmosis-water-filter-system-ph-remineralization-6](https://www.desertcart.uy/products/180744838-ph100-alkaline-reverse-osmosis-water-filter-system-ph-remineralization-6) --- *Product available on Desertcart Uruguay* *Store origin: UY* *Last updated: 2026-04-22*