--- product_id: 11011230 title: "Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank | Holds Up to 3.2 Gallons, Food Grade Bladder, Efficient Discharge Options, 1/4 Inch Male Pipe Thread" brand: "apec water" price: "€ 435.77" currency: EUR in_stock: true reviews_count: 13 category: "Apec Water" url: https://www.desertcart.sk/products/11011230-tank-4-4-gallon-pre-pressurized-water-storage-tank-holds store_origin: SK region: Slovakia --- # 4 gal pre-pressurized capacity 1/4 inch male pipe thread inlet/outlet Food-grade bladder, certified safe Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank | Holds Up to 3.2 Gallons, Food Grade Bladder, Efficient Discharge Options, 1/4 Inch Male Pipe Thread **Brand:** apec water **Price:** € 435.77 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your hydration game with pressure-perfect purity! ## Quick Answers - **What is this?** Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank | Holds Up to 3.2 Gallons, Food Grade Bladder, Efficient Discharge Options, 1/4 Inch Male Pipe Thread by apec water - **How much does it cost?** € 435.77 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/11011230-tank-4-4-gallon-pre-pressurized-water-storage-tank-holds) ## Best For - apec water enthusiasts ## Why This Product - Trusted apec water brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Heavy-duty stainless steel construction backed by industry-leading quality, trusted by thousands with a 4.6-star rating and decades of proven reliability. - • **Plug & Play Upgrade:** Easy installation with standard 1/4 inch male pipe thread connections—perfect for upgrading or replacing your RO system tank hassle-free. - • **Versatile Installation:** Efficient discharge in both vertical and horizontal positions with included tank stand—fits seamlessly under your sink or tight spaces. - • **Consistent Hydration Power:** Pre-pressurized 4-gallon tank delivers up to 3.2 gallons of purified water with steady pressure for your daily flow needs. - • **Premium Safety & Durability:** Food-grade bladder and stainless steel connectors ensure leak-free, odorless water storage certified for global safety standards. ## Overview The APEC Water Tank-4 is a 4-gallon pre-pressurized reverse osmosis storage tank designed for residential use. It holds up to 3.2 gallons of purified water, features a food-grade bladder and stainless steel connectors for safety and durability, and supports efficient water discharge in multiple orientations. Certified and pressure-tested, it offers a reliable, leak-free upgrade for RO systems with easy installation via 1/4 inch male pipe thread connections. ## Description Our standard ro water tanks offer quality water storage for use with most residential Reverse osmosis systems. Built with stainless steel construction, these durable tanks will deliver a continuous and stable supply of purified water at a fast flow rate with high volume suitable for average to large size families. Supported by fully enclosed polypropylene and butyl reservoirs, these storage tanks provide airtight protection against leaks. Their stainless steel connectors ensure leach-free integrity while post-cured diaphragms eliminate the possibility of odors from the tank. Individually pressure-tested for safety, all our tanks are certified and ce approved for materials quality, safety, and durability making them suitable for use anywhere in the world. Specifications: dimensions: 11 inch D x 15 inch h WEIGHT: 10 Lbs. Optional tank ball valve: 1/4 inch connection to 1/4 inch or 3/8 inch tube size (not included with the tank) Review: So far, so good! - I bought this to replace the stock tank for my RO system from GE. The old tank was barely putting out two cups of water at a time. However, the stock replacement was going to be around $150, so I was looking for a cheaper option. Since this tank is carried by the same store that I bought the RO system from, and they have it labeled as an "industry standard" in terms of pressure settings, I decided to give it a try. And so far, it works great! Much better pressure, and I get a lot more water out of the system at a time. Notably too, the water tastes better! Maybe because it's not mixing with old, stagnant water that can't be expelled. Super easy to install! Bought a shut off valve fitting to connect the tank to the plastic line of my system, and managed to connect it easily. Be sure to use plumbers tape on the fitting. I also used an O-ring for good measure. So far, no issues with leaking, as other people are reporting in their reviews. Review: Good quality - just like the original tank. - Nice unit. Looks identical to the one I replaced on my original RO system. Original tank lasted 24 years! Replaced it due to a leaking internal bladder. This one fixed the problem - back to good water pressure. ## Features - Pre-pressurized 4 gallon water storage tank (holds up to 3.2 gallon of water) - Discharge efficiently in a vertical or horizontal position with tank stand - Food grade bladder and certified to ensure quality, safety and durability - Inlet/outlet connection: 1/4 inch male pipe thread. Special designed for ro application ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00LU28SHE | | Best Sellers Rank | #8,178 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Undersink Water Filtration Replacement Parts | | Brand | APEC WATER | | Brand Name | APEC WATER | | Capacity | 4 gallons | | Container Type | Tank | | Customer Reviews | 4.6 out of 5 stars 3,320 Reviews | | Global Trade Identification Number | 00854961005310 | | Included Components | TANK-4 | | Installation Type | Under Sink | | Item Dimensions L x W x H | 11"L x 11"W x 14.5"H | | Item Highlight | Holds Up to 3.2 Gallons, Food Grade Bladder, Efficient Discharge Options, 1/4 Inch Male Pipe Thread | | Item Type Name | Reverse Osmosis Tank | | Item Weight | 0.9 kg | | LowerTemperature Range | 33 °F | | Manufacturer | APEC Water Systems | | Material | Stainless Steel | | Material Type | Stainless Steel | | Maximum Flow Rate | 0.8 gpm | | Model Name | TANK-4 | | Model Number | TANK-4 | | Number of Items | 1 | | Operating Pressure Range | 5-100 psi | | Other Special Features of the Product | Heavy Duty | | Part Number | TANK-4 | | Power Source | Corded Electric | | Product Dimensions | 11"L x 11"W x 14.5"H | | Purification Method | Reverse Osmosis | | Special Feature | Heavy Duty | | Supported Water TDS Level Maximum (PPM) | 500 | | UPC | 854961005310 | | Unit Count | 1 Count | ## Product Details - **Brand:** APEC WATER - **Capacity:** 4 gallons - **Included Components:** TANK-4 - **Installation Type:** Under Sink - **Material:** Stainless Steel - **Package Information:** Tank - **Power Source:** Corded Electric - **Product Dimensions:** 11"L x 11"W x 14.5"H - **Purification Method:** Reverse Osmosis - **Special Feature:** Heavy Duty ## Images ![Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank | Holds Up to 3.2 Gallons, Food Grade Bladder, Efficient Discharge Options, 1/4 Inch Male Pipe Thread - Image 1](https://m.media-amazon.com/images/I/61qErEepoSL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What is the recommended pressure for this expansion tank?** A: They come pressurized from the manufacturer with a required 4-6 psi. **Q: What is the size of the male threaded fitting on the top? 3/8"?** A: Size? Mine is in storage so not sure . The thread is tapered for a tight fit. Check APEC web site. It likely is the 3/8". Appears to be less than 1/2" and for sure more than 1/4" **Q: What is the recommended pressure for this expansion tank?** A: Label on my tank says 100 psi max. At one point, my tank was not putting out much water. I hooked up a pump which said there was about 20psi in the tank. I charged it to 95 and it works like it did when it was new. **Q: I need replacement tank for my Ecowater ero335. Is this a comparable model. The company here says everything out there is plastic.** A: I do t know if this will fit your exact model. But it should. just make sure the intake/outtake valve is the same size as your current tank. This one is definitely not plastic and the water has tasted great. ## Customer Reviews ### ⭐⭐⭐⭐⭐ So far, so good! *by C***R on December 3, 2024* I bought this to replace the stock tank for my RO system from GE. The old tank was barely putting out two cups of water at a time. However, the stock replacement was going to be around $150, so I was looking for a cheaper option. Since this tank is carried by the same store that I bought the RO system from, and they have it labeled as an "industry standard" in terms of pressure settings, I decided to give it a try. And so far, it works great! Much better pressure, and I get a lot more water out of the system at a time. Notably too, the water tastes better! Maybe because it's not mixing with old, stagnant water that can't be expelled. Super easy to install! Bought a shut off valve fitting to connect the tank to the plastic line of my system, and managed to connect it easily. Be sure to use plumbers tape on the fitting. I also used an O-ring for good measure. So far, no issues with leaking, as other people are reporting in their reviews. ### ⭐⭐⭐⭐⭐ Good quality - just like the original tank. *by M***Y on July 14, 2026* Nice unit. Looks identical to the one I replaced on my original RO system. Original tank lasted 24 years! Replaced it due to a leaking internal bladder. This one fixed the problem - back to good water pressure. ### ⭐⭐⭐⭐⭐ Great APEC tank for my Reverse Osmosis kitchen faucet system-nice price-great flow for my RO filter *by P***T on July 22, 2026* Great APEC tank for my Reverse Osmosis kitchen faucet filter. I've installed & used APEC Reverse Osmosis water systems for decades in my houses through the years and installed them for family members and friends. APEC RO systems are straightforward to install and provide clean pure water for cooking, drinking and giving to pets. APEC is a U.S. owned company that provides great customer service and excellent water filtering products: RO filter for kitchen cooking and drinking, whole house water filters to filter out chlorine and contaminants before the water can get to your shower/bathtub. I've had this 4 gallon tank in my APEC RO system, for 10 years in my present house. I recently found that I wasn't able to dispense more than half a gallon of filtered water at a time. Replacing this 4 gallon water tank (about a 19 minute job) restored my RO system's pressure and water flow back to gallons and gallons whenever needed. This tank is a bargain at a little more than $40 - I didn't have to replace my RO system to restore full filter flow. I recommend APEC water filter systems - excellent quality, a good value and great customer service! ## Frequently Bought Together - APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank - 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) - 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 --- ## 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.sk/products/11011230-tank-4-4-gallon-pre-pressurized-water-storage-tank-holds](https://www.desertcart.sk/products/11011230-tank-4-4-gallon-pre-pressurized-water-storage-tank-holds) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-09-05*