---
product_id: 25189635
title: "4.0-Gallon Reverse Osmosis Water Storage Tank RO Tank by Charman"
brand: "charman manufacturing"
price: "¥14752"
currency: JPY
in_stock: false
reviews_count: 8
url: https://www.desertcart.jp/products/25189635-4-0-gallon-reverse-osmosis-water-storage-tank-ro-tank
store_origin: JP
region: Japan
---

# 4.0-Gallon Reverse Osmosis Water Storage Tank RO Tank by Charman

**Brand:** charman manufacturing
**Price:** ¥14752
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** 4.0-Gallon Reverse Osmosis Water Storage Tank RO Tank by Charman by charman manufacturing
- **How much does it cost?** ¥14752 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/25189635-4-0-gallon-reverse-osmosis-water-storage-tank-ro-tank)

## Best For

- charman manufacturing enthusiasts

## Why This Product

- Trusted charman manufacturing brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description



## Images

![4.0-Gallon Reverse Osmosis Water Storage Tank RO Tank by Charman - Image 1](https://m.media-amazon.com/images/I/51mz9v2JoTL.jpg)
![4.0-Gallon Reverse Osmosis Water Storage Tank RO Tank by Charman - Image 2](https://m.media-amazon.com/images/I/71Ugqwph8OL.jpg)
![4.0-Gallon Reverse Osmosis Water Storage Tank RO Tank by Charman - Image 3](https://m.media-amazon.com/images/I/61Q75IAGXRL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Finally Needed To Re-Pressurized After 3 Full Year In Service!
  

*by M***O on Reviewed in the United States on January 30, 2018*

I wanted to give an update on this awesome RO storage tank. I initially gave my review telling how this tank had kept its pressure for many weeks. I was very impressed because my previous tank had to be re-pressurized every few weeks since the day I bought it. The seller's excuse was that it had a rubber tube inside & like any car tire, needed to be aired up over time. Well, for one thing, my car tires rarely need air...maybe a few pounds after several months...not a few weeks like my old tank did.Anyway, I am happy to report that it has been well over a year since I installed this NEW tank & to this day I have NOT needed to re-pressurize it. I know that it has lost a little pressure in all this time, but let me tell you...to this day, I still fill 2-3 gallons out at a time, which is more than enough for my household. Maybe, just maybe sometime later this year I will add some air to it...but no hurries...this tank is awesome!Update: 06-18-19Wanted to update this AWESOME tank. I finally repressurised this tank last month....after more than 3 YEARS...amazing!

### ⭐⭐⭐⭐⭐ 







  
  
    Nice little storage tank and the price is right
  

*by T***R on Reviewed in the United States on June 16, 2016*

Double boxed -nicely packed and remember that the 4.0 Gallon holds 3.2 gallons of water part of the space is occupied by Air and the bladder. There is no bad taste - I only flushed it once. This unit is precharged and easy to setup with standard fitting for a 3/8-Inch by 1/4-Inch NPFT Female Elbow Shut Off Valve

### ⭐ 







  
  
    Poor quality tank.
  

*by A***R on Reviewed in the United States on September 14, 2017*

This tank is less than a year old and does not hold pressure. The Jacob valve is tight, even replaced the center. would say the bladder is too light and starts leaking after a short time based on air coming from the faucet and needing constantly reloaded.

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**Shop now:** [https://www.desertcart.jp/products/25189635-4-0-gallon-reverse-osmosis-water-storage-tank-ro-tank](https://www.desertcart.jp/products/25189635-4-0-gallon-reverse-osmosis-water-storage-tank-ro-tank)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-11*