---
product_id: 15953032
title: "Hydronix PAE (RO-122) Water Storage Tank - 1/4\" MPT for Reverse Osmosis (RO) Systems - 2.2 Gallon Volume Capacity (White)"
brand: "pa-e"
price: "฿9499"
currency: THB
in_stock: true
reviews_count: 8
category: "Pa E"
url: https://www.desertcart.co.th/products/15953032-hydronix-pae-ro-122-water-storage-tank-1-4-mpt
store_origin: TH
region: Thailand
---

# 2.2 gal capacity 1/4" MPT stainless steel connection NSF/ANSI Standard 58 certified Hydronix PAE (RO-122) Water Storage Tank - 1/4" MPT for Reverse Osmosis (RO) Systems - 2.2 Gallon Volume Capacity (White)

**Brand:** pa-e
**Price:** ฿9499
**Availability:** ✅ In Stock

## Summary

> 🚰 Elevate your hydration game with pressurized purity!

## Quick Answers

- **What is this?** Hydronix PAE (RO-122) Water Storage Tank - 1/4" MPT for Reverse Osmosis (RO) Systems - 2.2 Gallon Volume Capacity (White) by pa-e
- **How much does it cost?** ฿9499 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/15953032-hydronix-pae-ro-122-water-storage-tank-1-4-mpt)

## 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

- • **Built to Last:** Durable stainless steel connection and virgin polypropylene liner ensure long-lasting, leak-free performance.
- • **Certified Clean:** NSF/ANSI Standard 58 certification guarantees safe, contaminant-free drinking water every time.
- • **Compact Powerhouse:** 2.2-gallon capacity delivers steady, pressurized filtered water on demand—perfect for tight spaces.
- • **Maintenance-Free Flow:** Pre-pressurized internal bladder design means no hassle, just consistent water pressure when you need it.
- • **Versatile Installation:** Works vertically or horizontally—ideal for under-sink setups, RVs, campers, or anywhere space is premium.

## Overview

The Hydronix PAE RO-122 is a 2.2-gallon reverse osmosis water storage tank featuring a pre-pressurized internal bladder and stainless steel 1/4" MPT connection. NSF/ANSI Standard 58 certified, it ensures safe, clean, and consistent filtered water flow. Compact and versatile, it fits perfectly under sinks or in mobile setups, offering maintenance-free, leak-resistant performance with a durable polypropylene liner and post-cured diaphragm for tasteless, odorless water.

## 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: Easy install, works very well - This was a replacement tank for an existing installation. The previous tank was a 5-gallon and took up an excessive amount of room under the sink. I have never done this type of installation before, but it was easy enough: 1) turn water to RO system off; 2) turn old tank off (there should be a valve on the old tank for this; if not, get a bucket and lots of towels ready); 3) disconnect (see below) the hose going to old tank (you can do this at either end, but there will be some leakage; also if you do not have a open/close valve on the old tank, disconnect the hose at the non-tank end and stick it into your bucket as quickly as you can); 4) remove old tank, take outside, re-open valve, admire the fountain; 5) unless you bought a new one, unscrew valve from old tank; 6) put a couple of turns of Teflon tape around the new tank stem; 7) screw valve onto new tank, leaving valve in open position; 8) put new tank into place; 9) reconnect pipe; 10) turn water back on and check for leaks. Leave it overnight to come up to pressure (water stream will be feeble until this happens). A note on dis- and re-connecting hoses: my installation used push-on connectors and I found that pushing in the little ring surrounding the hose and then pulling on the hose was the easiest way to get them disconnected. I really needed a third hand or a pair of small pliers. Also, when re-connecting the hose, make sure they are pushed in the whole way!
Review: Water Storage Tank - This is installed on top of my water heater. It fits great and very easy to install. It is well made and should last me a long time.

## 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 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #203,182 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #385 in Under-Sink & Countertop Filtration |
| Brand | PA-E |
| Certification | certified frustration-free |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (303) |
| Date First Available | October 14, 2011 |
| Installation Type | Under Sink |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 5.96 pounds |
| Item model number | RO-122 |
| Manufacturer | PAE |
| Model Name | RO 122 |
| Package Information | Can |
| Part Number | RO-122 |
| Product Dimensions | 9"L x 9"W x 14"H |
| Purification Method | Reverse Osmosis |
| Size | 14.5X9.5X9.5 INCHES |
| Special Feature | NSF certified |
| Special Features | NSF certified |
| Supported Water TDS Level Maximum (PPM) | 500 |
| UPC | 670541140116 661799343824 |

## Product Details

- **Brand:** PA-E
- **Capacity:** 2.2 Gallons
- **Installation Type:** Under Sink
- **Material:** Metal
- **Model Name:** RO 122
- **Package Information:** Can
- **Product Dimensions:** 9"L x 9"W x 14"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** NSF certified
- **Supported Water TDS Level Maximum (PPM):** 500

## Images

![Hydronix PAE (RO-122) Water Storage Tank - 1/4" MPT for Reverse Osmosis (RO) Systems - 2.2 Gallon Volume Capacity (White) - Image 1](https://m.media-amazon.com/images/I/71sgAMPuAFL.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

### ⭐⭐⭐⭐⭐ Easy install, works very well
*by S***R on December 23, 2019*

This was a replacement tank for an existing installation. The previous tank was a 5-gallon and took up an excessive amount of room under the sink. I have never done this type of installation before, but it was easy enough: 1) turn water to RO system off; 2) turn old tank off (there should be a valve on the old tank for this; if not, get a bucket and lots of towels ready); 3) disconnect (see below) the hose going to old tank (you can do this at either end, but there will be some leakage; also if you do not have a open/close valve on the old tank, disconnect the hose at the non-tank end and stick it into your bucket as quickly as you can); 4) remove old tank, take outside, re-open valve, admire the fountain; 5) unless you bought a new one, unscrew valve from old tank; 6) put a couple of turns of Teflon tape around the new tank stem; 7) screw valve onto new tank, leaving valve in open position; 8) put new tank into place; 9) reconnect pipe; 10) turn water back on and check for leaks. Leave it overnight to come up to pressure (water stream will be feeble until this happens). A note on dis- and re-connecting hoses: my installation used push-on connectors and I found that pushing in the little ring surrounding the hose and then pulling on the hose was the easiest way to get them disconnected. I really needed a third hand or a pair of small pliers. Also, when re-connecting the hose, make sure they are pushed in the whole way!

### ⭐⭐⭐⭐⭐ Water Storage Tank
*by M***E on November 25, 2025*

This is installed on top of my water heater. It fits great and very easy to install. It is well made and should last me a long time.

### ⭐⭐⭐⭐ Easy install and works good.
*by A***R on March 16, 2025*

Easy install and works good.

## 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.th/products/15953032-hydronix-pae-ro-122-water-storage-tank-1-4-mpt](https://www.desertcart.co.th/products/15953032-hydronix-pae-ro-122-water-storage-tank-1-4-mpt)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-25*