--- product_id: 53166472 title: "T55M" brand: "ispring" price: "€ 293.98" currency: EUR in_stock: true reviews_count: 8 category: "I Spring" url: https://www.desertcart.fi/products/53166472-t55m store_origin: FI region: Finland --- # 5.5 gal capacity for extended purified water supply Pre-pressurized 7-10 psi for instant water flow NSF certified food-grade butyl diaphragm ensures pure taste T55M **Brand:** ispring **Price:** € 293.98 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your RO system with pure, pressurized power—stay hydrated, stay ahead! ## Quick Answers - **What is this?** T55M by ispring - **How much does it cost?** € 293.98 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/53166472-t55m) ## 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 - • **Versatile Orientation:** Works flawlessly vertical or horizontal—fits your space perfectly - • **Effortless Installation:** Includes stainless steel 1/4" NPT valve & ball valve for quick setup - • **Premium Purity Assurance:** Food-grade butyl diaphragm with post-cure process guarantees tasteless, odorless water - • **Expanded Hydration Capacity:** Upgrade to 5.5 gallons—never run dry during peak demand - • **Trusted Quality & Certification:** NSF/ANSI tested and certified for peace of mind and superior performance ## Overview The iSpring T55M is a robust 5.5-gallon pre-pressurized metal water storage tank designed specifically for residential reverse osmosis systems. Featuring a food-grade butyl diaphragm and NSF certification, it ensures tasteless, odorless water. Its stainless steel 1/4" NPT valve and included ball valve simplify installation, while its ability to discharge water efficiently in both vertical and horizontal positions offers versatile placement. Pre-pressurized between 7-10 psi, it delivers instant water flow, making it a reliable upgrade for any RO setup. ## Description Metal tank 5.5 gal with 4.0 gal holding capacity, tested by independent third-party to meet NSF/ANSI Standard. Stainless steel connector 1/4 inch NPT, food grade materials. Special designed for RO applications. Discharges efficiently in a vertical or horizontal position. Tank stand included. Compatible with most reverse osmosis systems (including name brands) in the market. Review: Excellent Upgrade for RO Systems - I recently had to replace my old 4-gallon RO water tank that was leaking, and I couldn't be happier with my choice to upgrade to the iSpring 5.5 Gallon Residential Pre-Pressurized Water Storage Tank. The first thing that caught my attention was the quality construction of this tank. It looks and feels robust, giving me confidence in its durability. The 5.5-gallon capacity is a significant improvement over my previous 4-gallon tank, providing more water storage for my household needs. Installation was a breeze, thanks to the included top valve. The easy-to-follow instructions made the process straightforward, and I had it up and running in no time. The top valve not only adds to the convenience but also ensures efficient functionality. I appreciate the additional water capacity, especially during peak usage times. With this tank, I no longer have to worry about running out of purified water. The iSpring T55M has exceeded my expectations with its quality and ease of installation. If you're in need of a reliable and high-capacity water storage tank for your RO system, I highly recommend this tank It's a top-notch product that delivers on quality and increased water capacity. Five stars all the way! Review: Larger than expected - Read the dimensions before ordering, I thought it would be smaller. Works great, dispenses water quickly, you can adjust the pressure easily. The metal body is definitely built well, hope the insides are of equal quality. Did not notice any taste what so ever. Super easy to install, just connect the hose and put it under the sink. ## Features - 5.5 gallon metal pressurized tank - Made from food grade butyl diaphragm with post-cure procedures provides a tasteless and odorless water chamber - Stainless steel 1/4" NPT valve thread, Ball Valve Included - Discharges effectively in both vertical and horizontal position - Pre-pressurized between 7-10 psi for common use ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01CES39N0 | | Best Sellers Rank | #5,497 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #18 in Under-Sink & Countertop Filtration | | Brand | iSpring | | Brand Name | iSpring | | Capacity | 5.5 Gallons | | Container Type | Can | | Customer Reviews | 4.7 out of 5 stars 813 Reviews | | Global Trade Identification Number | 00662425080236 | | Included Components | Tank, Parts | | Installation Type | Under Sink | | Item Dimensions L x W x H | 17"L x 12"W x 12"H | | Item Type Name | Pre-Pressurized Water Storage Tank for Reverse Osmosis (RO) Systems | | LowerTemperature Range | 40 Degrees Fahrenheit | | Manufacturer | iSpring Water Systems | | Material | Metal tank | | Material Type | Metal tank | | Model Name | T55M 5.5 Gallon Residential | | Model Number | T55M | | Other Special Features of the Product | NSF certified | | Product Dimensions | 17"L x 12"W x 12"H | | Purification Method | Reverse Osmosis | | Special Feature | NSF certified | | Supported Water TDS Level Maximum (PPM) | 1000 | | UPC | 662425080236 | | Unit Count | 1.0 Count | | Upper Temperature Rating | 100 Degrees Fahrenheit | ## Product Details - **Brand:** iSpring - **Capacity:** 5.5 Gallons - **Included Components:** Tank, Parts - **Installation Type:** Under Sink - **Material:** Metal tank - **Model Name:** T55M 5.5 Gallon Residential - **Package Information:** Can - **Product Dimensions:** 17"L x 12"W x 12"H - **Purification Method:** Reverse Osmosis - **Special Feature:** NSF certified ## Images ![T55M - Image 1](https://m.media-amazon.com/images/I/51evSYgGNhL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Can I connect 2 tanks together for more water storage?** A: I put two 3.2 gal tanks together with a tee last month. It works fantastic!! **Q: Anyone know if this will work for Whirlpool RO systems? The support rep told me any RO tank would work. Anyone use this for another system?** A: I don't think it matters what RO system you have. If it has the option for a reserve tank and the fitting works, then it should fill with water. **Q: What is the pressure rating for the tank. Can it handle 60 psi?** A: Remember that the RO system water valve regulates the "internal" pressure, so the tank is not going to see the actual water line pressure. Most valves operate at 65%, so if your water line pressure is 60 psi, the pressure at the tank generally won't be more than 40 PSI. In most setups you'd need the pressure on the water line to be around 92 PSI to get 60 PSI on the tank. **Q: What is the diameter of the 5.5 gal tank?** A: Thanks for the question! The diameter of the tank is 12" x 16" (H) Kindest, iSpring Team ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent Upgrade for RO Systems *by J***E on January 10, 2024* I recently had to replace my old 4-gallon RO water tank that was leaking, and I couldn't be happier with my choice to upgrade to the iSpring 5.5 Gallon Residential Pre-Pressurized Water Storage Tank. The first thing that caught my attention was the quality construction of this tank. It looks and feels robust, giving me confidence in its durability. The 5.5-gallon capacity is a significant improvement over my previous 4-gallon tank, providing more water storage for my household needs. Installation was a breeze, thanks to the included top valve. The easy-to-follow instructions made the process straightforward, and I had it up and running in no time. The top valve not only adds to the convenience but also ensures efficient functionality. I appreciate the additional water capacity, especially during peak usage times. With this tank, I no longer have to worry about running out of purified water. The iSpring T55M has exceeded my expectations with its quality and ease of installation. If you're in need of a reliable and high-capacity water storage tank for your RO system, I highly recommend this tank It's a top-notch product that delivers on quality and increased water capacity. Five stars all the way! ### ⭐⭐⭐⭐⭐ Larger than expected *by E***E on June 11, 2025* Read the dimensions before ordering, I thought it would be smaller. Works great, dispenses water quickly, you can adjust the pressure easily. The metal body is definitely built well, hope the insides are of equal quality. Did not notice any taste what so ever. Super easy to install, just connect the hose and put it under the sink. ### ⭐⭐⭐⭐⭐ Add capacity to your RO system *by M***R on December 11, 2025* Work very well. I needed to add air to the tank bladder but it holds more than standard tanks that come with RO systems. I really didn't test how much, but it's probably around 4 gallons. ## Frequently Bought Together - iSpring T55M 5.5 Gallon Residential Pre-Pressurized Water Storage Tank for Reverse Osmosis (RO) Systems , White - John Guest 3/8 Inch O.D. Tube Size x 1/4 Inch NPTF Speedfit to Female Shut Off Valve, Push to Connect Plastic Plumbing Fitting, PPSV501222WP - Metpure Quick Connect Tank Ball Valve with Gasket For Water Purification Systems And Reverse Osmosis System Pressurized Water Storage Tank (1/4" Female NPT x 3/8" OD Quick Connect) --- ## 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.fi/products/53166472-t55m](https://www.desertcart.fi/products/53166472-t55m) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-04-25*