--- product_id: 95887382 title: "Membrane Solutions 100 GPD RO Membrane and 1812 Housing Kit | Reverse Osmosis Membrane with Housing, MNPT Elbow Fittings, Check Valve and Wrench for Under Sink RO Water Filter DIY, 1 Set" brand: "membrane solutions" price: "$105.84" currency: USD in_stock: true category: "Membrane Solutions" url: https://www.desertcart.us/products/95887382-membrane-solutions-100-gpd-ro-membrane-and-1812-housing-kit store_origin: US region: United States of America --- # 100 GPD high flow rate Complete DIY installation kit 97% contaminant rejection Membrane Solutions 100 GPD RO Membrane and 1812 Housing Kit | Reverse Osmosis Membrane with Housing, MNPT Elbow Fittings, Check Valve and Wrench for Under Sink RO Water Filter DIY, 1 Set **Brand:** membrane solutions **Price:** $105.84 **Availability:** ✅ In Stock ## Summary > 💧 Upgrade your hydration game with pro-grade RO filtration! ## Quick Answers - **What is this?** Membrane Solutions 100 GPD RO Membrane and 1812 Housing Kit | Reverse Osmosis Membrane with Housing, MNPT Elbow Fittings, Check Valve and Wrench for Under Sink RO Water Filter DIY, 1 Set by membrane solutions - **How much does it cost?** $105.84 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/95887382-membrane-solutions-100-gpd-ro-membrane-and-1812-housing-kit) ## Best For - membrane solutions enthusiasts ## Why This Product - Trusted membrane solutions brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless DIY Upgrade:** Includes membrane housing, wrench, quick-connect fittings, and check valve—install like a pro without a plumber. - • **Smart Water Efficiency:** Optimized for urban tap water conditions, ensuring consistent output even with fluctuating temperature and pressure. - • **Certified Quality Assurance:** ANSI and NSF certified with rigorous lab testing to guarantee peak performance and durability. - • **Next-Level Filtration Precision:** Removes 97% of dissolved solids, including heavy metals and harmful minerals, for water you can trust. - • **Pure Hydration, Fast & Reliable:** Delivers up to 100 gallons of crystal-clear water daily—quench your thirst without waiting. ## Overview The Membrane Solutions 100 GPD RO Membrane kit offers a high-capacity reverse osmosis filtration system designed for under-sink home use. It delivers up to 100 gallons of purified water daily, removing up to 97% of total dissolved solids including heavy metals. The package includes a membrane housing, wrench, quick-connect fittings, and check valve for easy DIY installation. Certified by ANSI and NSF, this polyamide thin-film composite membrane ensures reliable, high-quality water filtration with tested performance under standard urban water conditions. ## Description Buy Membrane Solutions 100 GPD RO Membrane, Reverse Osmosis Membrane with Membrane Housing, Replacement for Under Sink Home Drinking RO Water Filter System, Wrench,1/4" Quick-Connect Fittings,Check Valve: Replacement Under-Sink Water Filters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - [DIY RO System] What You'll Get: 100 GPD RO Membrane*1, 12" X 2.0" Membrane Housing*1, Wrench*1, Quick Connect Fittings*3. Make your own reverse osmosis water filter right now! You don't need to buy an expensive all-in-one solution. - [100 Gallon Per Day] Membrane Solutions High-Quality Reverse Osmosis Membrane can produce 100 gallons purified water per day (4.1 gallons / 15.8 liters per hour). 8 glasses of 8oz cups of water are recommended 1 gallon. You can get a gallon of water in about 15 minutes. You just need to open the faucet of the RO purifier using this RO membrane, you can get drinking water. - [High Contaminant Rejection] Remove up to 97% of total dissolved solids from water. This membrane is only 0.1nm, 50 times smaller than even the heavy metals. So these RO membranes can easily remove heavy metal, harmful minerals and other soluble salts from water. Enjoy Your Water with Confidence! - [100% Performance and Quality Tested] Membrane Solutions RO membrane uses the most advanced membrane film technology and manufacturing processes, verified by independent laboratory testing. These reverse osmosis membranes are made of the highest quality Polyamide Thin-Film Composite ensures that you get the most filtration and surface area coverage, let you enjoy high-quality taste. - [About RO GPD Ratings] GPD ratings are based on tests performed under specific water conditions (Urban tap water, 25°C / 77 °F, 100 PSI). Every time the temperature drops by 1°C / 33.8°F, the GPD Rating drops by about 3-4%; every time the pressure drops by 1 PSI, the GPD Rating drops by about 1 - 1.5%. For example, a standard 100 GPD RO membrane, at a temperature of 10°C / 50°F (or a pressure of 50 PSI), the GPD Rating is about 50. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07H2Z5ZJH | | Best Sellers Rank | #237,358 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,620 in Replacement Under-Sink Water Filters | | Brand Name | Membrane Solutions | | Customer Reviews | 4.4 4.4 out of 5 stars (566) | | External Testing Certification | ANSI, NSF | | Global Trade Identification Number | 00850071881936 | | Item Dimensions D x W x H | 2"D x 2"W x 12"H | | Item Weight | 0.9 Pounds | | Manufacturer | Membrane Solutions | | Manufacturer Part Number | ROSL1812-100G | | Manufacturer Warranty Description | We provide worry-free service and water purification solutions, welcome to disturb us! | | Material Type | Polyamide Thin-Film Composite | | Model Number | ROSL1812-100G | | Number of Items | 1 | | Product Benefits | Reduces TDS | | Set Name | 100 GPD RO Membrane Set | | UPC | 850071881936 | | Unit Count | 1.0 Count | ## Product Details - **External Testing Certification:** ANSI, NSF - **Item Weight:** 0.9 Pounds - **Material:** Polyamide Thin-Film Composite - **Product Benefits:** Reduces TDS - **Product Dimensions:** 2"D x 2"W x 12"H ## Images ![Membrane Solutions 100 GPD RO Membrane and 1812 Housing Kit | Reverse Osmosis Membrane with Housing, MNPT Elbow Fittings, Check Valve and Wrench for Under Sink RO Water Filter DIY, 1 Set - Image 1](https://m.media-amazon.com/images/I/61VtjUpXuzS.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: Does it constantly discharge reject water even when your not using pure water** A: YES, you need to close both outputs or water will discharge from the brine. To stop it from running constantly most use an ASV (Automatic shutoff valve). You will also need a flow restrictor on the Brine, sized appropriately for the RO membrane **Q: what is the wastewater to purified water ratio? can the flow restrictor be bypassed to flush?** A: The purified water to wastewater ratio is 1/2. **Q: Why waste water line seems to be running a lot of water ?** A: Waste water is usually 1gallon RO/DI to 2 to 4 gallons waste. I brought my waste to 1 -2 gallaons of waste to 1 gallon Ro/DI with a booster pump. I also added and upgradeed from 100G to 200Gallon system. Just added another 100G ro/di canister. use the waste water for plants, and garden. If ypu can get waste tube to go out and into a diffrent barrel or yard, you can recycle it. booster pump helps to reduce the waste, unfortunately there is no other way to completely reduce it to zero. good luck. **Q: Can you suggest asov for the 400g system? it has 3/8 input x 1/4 output - all of the asov on amazon are 1/4 x 1/4 or (rare) 3/8/ x 3/8** A: Chemo “Harrington Plastics “ online ## Frequently Bought Together - Membrane Solutions 100 GPD RO Membrane, Reverse Osmosis Membrane with Membrane Housing, Replacement for Under Sink Home Drinking RO Water Filter System, Wrench,1/4" Quick-Connect Fittings,Check Valve - Malida Stainless Water Pressure Test Gauge, Water Pressure Detector for Aquarium Meter 0-1.6MPa 0-220psi Reverse Osmosis System Pump with 1/4. - PUREPLUS 5 Micron 10" x 4.5" Whole House Sediment Home Water Filter Replacement Cartridge for Culligan RFC-BBSA, HD-950, WFHD13001B, W15-PR, GXWH30C, GXWH35F, Aqua-Pure AP817, PP10BB, 2PACK --- ## 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.us/products/95887382-membrane-solutions-100-gpd-ro-membrane-and-1812-housing-kit](https://www.desertcart.us/products/95887382-membrane-solutions-100-gpd-ro-membrane-and-1812-housing-kit) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-25*