---
product_id: 66564552
title: "– RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4\" Tank Ball Valve"
brand: "tankro"
price: "₨70737"
currency: LKR
in_stock: true
url: https://www.desertcart.lk/products/66564552-ro-water-filtration-system-expansion-tank-6-gallon-water-tank
store_origin: LK
region: Sri Lanka
---

# 6 Gallon capacity 1/4" quick connect valve Durable steel construction – RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve

**Brand:** tankro
**Price:** ₨70737
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with the ultimate RO expansion tank—because clean water waits for no one!

## Quick Answers

- **What is this?** – RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve by tankro
- **How much does it cost?** ₨70737 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/66564552-ro-water-filtration-system-expansion-tank-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

- • **Compact Powerhouse:** Slim 17.5 x 12 x 12 inch design fits seamlessly under most kitchen sinks without sacrificing capacity.
- • **On-Demand Refreshment:** Stores up to 4.4 gallons of filtered water, delivering instant access to clean hydration anytime.
- • **Plug & Play Convenience:** Includes a free 1/4" tank ball valve for effortless installation and quick replacements.
- • **Built to Last, Built for You:** Rigorously tested deep-drawn steel tank with precision welding ensures unmatched durability.
- • **Pure Hydration, Zero Compromise:** Crafted from 100% food-grade materials to keep your water pristine and chemical-free.

## Overview

The tankRo 6 Gallon RO Water Filtration Expansion Tank is a compact, durable storage solution designed for reverse osmosis systems. Made from 100% food-grade materials and deep-drawn steel with precision welding, it ensures long-lasting purity and reliability. Featuring a free 1/4" quick connect tank ball valve, it offers easy installation and maintenance. Its space-saving dimensions fit under most kitchen sinks, storing up to 4.4 gallons of filtered water for instant, on-demand access.

## Description

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

## 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 |
|---------------|-------|
| Brand | tankRo |
| Special Feature | Durable |
| Product Dimensions | 12"L x 12"W x 17.5"H |
| Package Information | Bottle |
| Installation Type | Under Sink |
| Power Source | Manual |
| Model Name | GTS6 |
| Upper Temperature Rating | 212 Degrees Fahrenheit |
| Supported Water TDS Level Maximum (PPM) | 50 |
| UPC | 653590999294 |
| Manufacturer | tankRo |
| Part Number | GTS6 |
| Item Weight | 8.58 pounds |
| Item model number | GTS6 |
| Is Discontinued By Manufacturer | No |
| Size | 6 Gallons |
| Color | Blue |
| Style | 6 Gallons |
| Item Package Quantity | 1 |
| Capacity Description | 4.4 Gallons |
| Special Features | Durable |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

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

## Images

![– RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve - Image 1](https://m.media-amazon.com/images/I/61J7NkvwVAL.jpg)
![– RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve - Image 2](https://m.media-amazon.com/images/I/61kqj+Fl03L.jpg)
![– RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve - Image 3](https://m.media-amazon.com/images/I/71-av3YxucL.jpg)
![– RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve - Image 4](https://m.media-amazon.com/images/I/717lmuIbPuS.jpg)
![– RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve - 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.

## 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

---

## 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.lk/products/66564552-ro-water-filtration-system-expansion-tank-6-gallon-water-tank](https://www.desertcart.lk/products/66564552-ro-water-filtration-system-expansion-tank-6-gallon-water-tank)

---

*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-01-29*