--- product_id: 97634529 title: "PA-E RO-122 Small Reverse Osmosis Water Storage Pressure Tank" brand: "pa-e" price: "£141.00" currency: GBP in_stock: true reviews_count: 1 category: "Pa E" url: https://www.desertcart.co.uk/products/97634529-pa-e-ro-122-small-reverse-osmosis-water-storage-pressure store_origin: GB region: United Kingdom --- # 2.2-gallon pressurized capacity Pre-charged internal bladder design NSF/ANSI Standard 58 certified safety PA-E RO-122 Small Reverse Osmosis Water Storage Pressure Tank **Brand:** pa-e **Price:** £141.00 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your hydration game with pressure-perfect purity! ## Quick Answers - **What is this?** PA-E RO-122 Small Reverse Osmosis Water Storage Pressure Tank by pa-e - **How much does it cost?** £141.00 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/97634529-pa-e-ro-122-small-reverse-osmosis-water-storage-pressure) ## Best For - pa-e enthusiasts ## Why This Product - Trusted pa-e brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Space-Smart Design:** Compact stainless steel tank fits perfectly under sinks, in RVs, or campers without sacrificing capacity. - • **Certified Clean & Safe:** NSF/ANSI Standard 58 certification guarantees top-tier water purity and safety. - • **Leak-Proof Engineering:** Sealed brass air valve and o-ring cap deliver a durable, leak-free water storage solution. - • **Maintenance-Free Reliability:** Pre-pressurized internal diaphragm means no hassle, just pure performance. - • **Consistent On-Demand Hydration:** 2.2-gallon capacity ensures steady filtered water flow whenever you need it. ## Overview The PA-E RO-122 is a compact, 2.2-gallon stainless steel reverse osmosis water storage tank designed for under-sink RO systems. Featuring a pre-charged internal bladder and NSF/ANSI Standard 58 certification, it delivers consistent, pressurized, contaminant-free water with a leak-proof, maintenance-free design ideal for modern, space-conscious homes and mobile lifestyles. ## Description The RO-122 tank's water storage chamber features a virgin polypropylene liner, high-grade chlorobutyl diaphragm and stainless steel 1/4" MPT water connection. The diaphragm is post-cured to ensure that your water is tasteless, odorless and contaminant free. The tank is built with a sealed brass air valve and o-ring sealed cap to ensure a leak-free air chamber. Perfect for compact under sink RO units, RVs, Campers, or any other use where space is limited. This tank discharges efficiently in a vertical or horizontal position. Tank comes with Pre-charged pressure and ready to use. A Fitting is required to connect to your water system and faucet Review: Perfect replacement - Just what we needed to replace an old one. ## Features - [TORAGE TANK FOR HOME SYSTEMS: The PAE RO-122 stainless steel reverse osmosis storage tank is compatible with most under-sink RO water filter systems - With a 2.2-gallon total volume capacity, it provides a consistent supply of pressurized filtered water on demand - MAINTENANCE-FREE PRESSURE TANK: This RO water storage tank is NSF/ANSI Standard 58 certified, meeting strict health and safety standards for drinking water systems - It is pre-pressurized, INTERNAL BLADDER DESIGN: The PAE RO-122 bladder-style reverse osmosis tank uses a pre-charged internal diaphragm to deliver steady, pressurized water flow., SAFE MATERIALS FOR CLEAN DRINKING WATER - The diaphragm inside this reverse osmosis water pressure tank is post-cured to remove harmful chemicals and residues, ensuring cleaner, safer water.] ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00A7GFVI8 | | Best Sellers Rank | 934,155 in DIY & Tools ( See Top 100 in DIY & Tools ) 613 in Under-Sink Filters | | Brand | PA-E | | Capacity | 2.2 gallons | | Container Type | Dispenser | | Customer Reviews | 5.0 out of 5 stars 1 Review | | EU Spare Part Availability Duration | 5 Years | | Included Components | Storage Tank, Tank Holding Bracket | | Included components | Storage Tank, Tank Holding Bracket | | Installation Type | Under Sink | | Item Dimensions L x W x H | 22.9L x 22.9W x 35.6H centimetres | | Manufacturer | PA-E | | Material | Brass , Polypropylene , Stainless Steel | | Material Type | Brass, Polypropylene, Stainless Steel | | Model Name | RO-122 | | Model Number | RO-122 | | Other Special Features of the Product | NSF certified | | Power Source | Corded Electric | | Product dimensions | 22.9L x 22.9W x 35.6H centimetres | | Purification Method | Reverse Osmosis | | Special feature | NSF certified | | Supported Water TDS Level Maximum (PPM) | 500 | | UPC | 670541140116 661799343824 | | Unit Count | 1.0 count | ## Product Details - **Brand:** PA-E - **Capacity:** 2.2 gallons - **Included components:** Storage Tank, Tank Holding Bracket - **Installation type:** Under Sink - **Material:** Brass, Polypropylene, Stainless Steel - **Package information:** Dispenser - **Power source:** Corded Electric - **Product dimensions:** 22.9L x 22.9W x 35.6H centimetres - **Purification method:** Reverse Osmosis - **Special feature:** NSF certified ## Images ![PA-E RO-122 Small Reverse Osmosis Water Storage Pressure Tank - Image 1](https://m.media-amazon.com/images/I/71sgAMPuAFL.jpg) ![PA-E RO-122 Small Reverse Osmosis Water Storage Pressure Tank - Image 2](https://m.media-amazon.com/images/I/815AljmHu1L.jpg) ![PA-E RO-122 Small Reverse Osmosis Water Storage Pressure Tank - Image 3](https://m.media-amazon.com/images/I/71TTzMKBfgL.jpg) ## Questions & Answers **Q: how much time it's good until need replacement ?** A: Mine lasted 18 months. Considering it was a replacement for a different tank that lasted 5 years, I consider that pretty poor. **Q: How much pressure is in it when received?** A: It comes with the proper pressure. Over time, the pressure will get too low. Go on YouTube to For instructions on how to re-pressurize. **Q: Pba free?** A: works well **Q: What's the recommended pressure to keep on the bladder? 8psi?** A: Pre-charge with 5-7 psi of air pressure. When tank is full it may reach 45 to 50 psi of pressure depending on your RO system. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect replacement *by M***N on 14 June 2024* Just what we needed to replace an old one. ## Frequently Bought Together - Hydronix PA-E RO-122 Small Reverse Osmosis Water Storage Pressure - 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.co.uk/products/97634529-pa-e-ro-122-small-reverse-osmosis-water-storage-pressure](https://www.desertcart.co.uk/products/97634529-pa-e-ro-122-small-reverse-osmosis-water-storage-pressure) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-25*