---
product_id: 66564552
title: "6 Gallon Water Tank"
brand: "tankro"
price: "€ 269.16"
currency: EUR
in_stock: null
reviews_count: 13
url: https://www.desertcart.nl/products/66564552-6-gallon-water-tank
store_origin: NL
region: Netherlands
---

# 4.4 Gallon capacity 1/4" quick connect ball valve included Durable deep-drawn steel with precision welding 6 Gallon Water Tank

**Brand:** tankro
**Price:** € 269.16
**Availability:** ❌ Out of Stock

## Summary

> 💧 Elevate your hydration game with pure, pressurized perfection!

## Quick Answers

- **What is this?** 6 Gallon Water Tank by tankro
- **How much does it cost?** € 269.16 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/66564552-6-gallon-water-tank)

## Best For

- tankro enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Crafted from food-grade materials and rugged steel domes, rigorously tested to ensure long-term durability and safety.
- • **Compact & Space-Savvy:** Designed with sleek dimensions (17.5 x 12 x 12 inches) to fit discreetly under most kitchen sinks without clutter.
- • **Effortless Installation:** Comes with a free 1/4" quick connect tank ball valve for a seamless, tool-free setup under your sink.
- • **On-Demand Pure Hydration:** Stores up to 4.4 gallons of crystal-clear RO water for instant access whenever you need it.
- • **Trusted Quality Assurance:** Backed by a 1-year warranty and glowing 4.5-star reviews from over 1,300 satisfied users.

## Overview

The tankRO 6 Gallon RO Water Filtration Expansion Tank is a compact, durable storage solution designed to enhance your reverse osmosis system. Made from 100% food-grade materials and precision-welded steel, it stores up to 4.4 gallons of purified water, ensuring on-demand access to clean drinking water. Featuring a free 1/4" quick connect ball valve, it offers easy installation and reliable performance, backed by a 1-year warranty and strong customer satisfaction.

## Description

tankRO – RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve - desertcart.com

Review: Exactly What I Needed - Works Great - Easy to install, good quality and works like a charm. Much cheaper than getting a replacement through Kinetico.
Review: Good quality and fair price - Works exceptionally well as expected

## Features

- Reverse Osmosis Tank: Made from 100% food grade materials, this RO water tank stores and keeps your water free from any impurities and harsh chemicals. The perfect addition to any RO water system.
- Easy to Install Water Tank: RO tank replacements include free tank ball valve for easy set-up and replacement with 1⁄4” quick connect design.
- Durable Water Storage Tank: This RO water tank is rigorously tested for quality and durability and includes a 1-year warranty.
- High Quality Water Tank: This water storage tank is made from durable deep-drawn steel domes with precision welding to ensure long lasting value for your RO water system.
- Water Tank Dimensions: This compact water tank is designed (17.5 x 12 x 12) to fit under most kitchen sinks. Stores up to 4.4 gallons of water for on-demand filtered drinking water.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B079Z19PP8 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #85,940 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #193 in Under-Sink & Countertop Filtration |
| Brand | tankRo |
| Capacity Description | 4.4 Gallons |
| Color | Blue |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,364) |
| Date First Available | February 21, 2018 |
| Installation Type | Under Sink |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 8.58 pounds |
| Item model number | GTS6 |
| Manufacturer | tankRo |
| Model Name | GTS6 |
| Package Information | Bottle |
| Part Number | GTS6 |
| Power Source | Manual |
| Product Dimensions | 12"L x 12"W x 17.5"H |
| Size | 6 Gallons |
| Special Feature | Durable |
| Special Features | Durable |
| Style | 6 Gallons |
| Supported Water TDS Level Maximum (PPM) | 50 |
| UPC | 653590999294 |
| Upper Temperature Rating | 212 Degrees Fahrenheit |

## Product Details

- **Brand:** tankRo
- **Capacity:** 6 Gallons
- **Included Components:** Reverse Osmosis Water Storage Pressure Tank with Tank Ball Valve
- **Installation Type:** Under Sink
- **Material:** Polypropylene
- **Package Information:** Bottle
- **Power Source:** Manual
- **Product Dimensions:** 12"L x 12"W x 17.5"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Durable

## Images

![6 Gallon Water Tank - Image 1](https://m.media-amazon.com/images/I/61J7NkvwVAL.jpg)
![6 Gallon Water Tank - Image 2](https://m.media-amazon.com/images/I/61kqj+Fl03L.jpg)
![6 Gallon Water Tank - Image 3](https://m.media-amazon.com/images/I/71-av3YxucL.jpg)
![6 Gallon Water Tank - Image 4](https://m.media-amazon.com/images/I/717lmuIbPuS.jpg)
![6 Gallon Water Tank - Image 5](https://m.media-amazon.com/images/I/613-2iDsH9L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is this tank precharged?**
A: Yes, the tank arrived pre-charged @ 10 psi.

**Q: How mich psi will a tank this size put out? My small 3 gallon tank does not put out eniugh psi to get water out of my fridge. Wondering if psi out of**
A: In an empty tank, air pressure should be 7-10 psi. In a full/heavy tank, air pressure should be 30-40 psi. To be accurate, air pressure should be 2/3 of incoming water pressure. When the tank is full, and if feed water pressure to the RO system is 60 psi, then a full tank should have 40 psi.

**Q: how much air pressure should come in the tank?  Only getting 1.5 gallons of water there is 19.5psi of air in tank.**
A: if you are at 19.5 psi when it is empty, then you have too much air pressure.  Try lowering the bladder temperature to between 7 and 10.  Many RO systems only output about 20 psi

**Q: How long should it take for the tank to reach full capacity at an empty psi of 10?**
A: I have my water pressure regulator to my house set at 70 psi. And my 5 stage reverse osmosis system produces about 1 gallon of water every 2 hours +/- .  There are several factors to take into consideration to determine water output. Yours may or may not produce similar results. But if your system produces similar results then it will take approximately 9 hours to fill the tank completely since The tank holds about 4 1/2 gallons max.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Exactly What I Needed - Works Great
*by J***I on November 26, 2025*

Easy to install, good quality and works like a charm. Much cheaper than getting a replacement through Kinetico.

### ⭐⭐⭐⭐⭐ Good quality and fair price
*by J***N on January 21, 2026*

Works exceptionally well as expected

### ⭐⭐⭐⭐⭐ Ditch that small tank for this - you will be glad you did. SO. MUCH. WATER!
*by B***Y on September 11, 2025*

Original RO system came with a paltry 3 gallon tank, of which only 1.8 gallons was for water storage. I didn't know how awful that was until the membrane in that tank died. Determined to ensure we always have enough RO and plenty of pressure in the line, I doubled the desired capacity, and then DOUBLED it AGAIN. So, the 8 desired gallons of liquid required a 10-12 gallon tank. The tank came with ZERO installation hardware. I stole the old valve from the old tank which worked out just fine. By morning, we had 8 gallons of RO water flowing. I strongly recommend this tank!

## Frequently Bought Together

- tankRO – RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve
- Malida 1/4 inch O.D. Length 32.8ft(10 meters) RO Water Tubing, Hose Pipe for RO Water purifiers System,+ 1/4 O.D quick connector 10pcs
- Lemoy 1/4" OD Quick Connect Push In to Connect Water Tube Fitting for RO Reverse Osmosis Water Filter Fittings Pack of 30

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**Shop now:** [https://www.desertcart.nl/products/66564552-6-gallon-water-tank](https://www.desertcart.nl/products/66564552-6-gallon-water-tank)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-03-04*