---
product_id: 66564551
title: "GTS3 3 Gallon RO Water Filtration Expansion Tank, Compact | White Finish, Includes 1/4\" Ball Valve, Durable Steel Construction, Universal Fit for RO Units"
brand: "tankro"
price: "$258.96"
currency: USD
in_stock: true
category: "Tank Ro"
url: https://www.desertcart.us/products/66564551-gts3-3-gallon-ro-water-filtration-expansion-tank-compact-white
store_origin: US
region: United States of America
---

# 3 Gallon Capacity 1/4” Quick Connect Valve Durable Steel Construction GTS3 3 Gallon RO Water Filtration Expansion Tank, Compact | White Finish, Includes 1/4" Ball Valve, Durable Steel Construction, Universal Fit for RO Units

**Brand:** tankro
**Price:** $258.96
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with the GTS3 – because clean water waits for no one!

## Quick Answers

- **What is this?** GTS3 3 Gallon RO Water Filtration Expansion Tank, Compact | White Finish, Includes 1/4" Ball Valve, Durable Steel Construction, Universal Fit for RO Units by tankro
- **How much does it cost?** $258.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/66564551-gts3-3-gallon-ro-water-filtration-expansion-tank-compact-white)

## 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 14x9x9 inch design fits seamlessly under most kitchen sinks without clutter.
- • **On-Demand Refreshment:** Stores up to 3 gallons for instant access to clean, filtered water anytime.
- • **Plug & Play Installation:** Includes free ball valve with quick connect design for effortless setup.
- • **Built to Last, Built for You:** Rigorously tested steel tank with precision welding ensures long-term durability.
- • **Pure Hydration, Zero Compromise:** 100% food-grade materials keep your water pristine and chemical-free.

## Overview

The GTS3 is a compact 3-gallon reverse osmosis expansion tank made from 100% food-grade, BPA-free materials. Designed for under-sink installation, it features a durable deep-drawn steel dome with precision welding, a 1/4” quick connect ball valve for easy setup, and supports operating pressures from 5 to 100 PSI. Its slim 14x9x9 inch footprint fits most kitchens, delivering on-demand purified water with a maximum flow rate of 0.8 gallons per minute, backed by a 1-year warranty.

## Description

TankRO GTS3, 3 Gallon RO Water Filtration System Expansion Tank, Compact Reverse Osmosis Water Storage Pressure Tank - desertcart.com

## 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 (14 x 9 x 9) to fit under most kitchen sinks. Stores up to 2.2 gallons of water for on-demand filtered drinking water.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B079YZ8THK |
| Best Sellers Rank | #44,803 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #78 in Under-Sink & Countertop Filtration |
| Brand Name | tankRo |
| Capacity | 3 gallons |
| Container Type | Tank |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,389) |
| Included Components | Tank |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 9"L x 9"W x 14"H |
| Item Weight | 6 Pounds |
| LowerTemperature Range | 33 Degrees Fahrenheit |
| Manufacturer | tankRo |
| Material Type | BPA Free |
| Maximum Flow Rate | 0.8 Gallons Per Minute |
| Model Name | GTS3 |
| Model Number | GTS3 |
| Operating Pressure Range | 5-100 PSI |
| Other Special Features of the Product | Durable |
| Part Number | GTS3 |
| Power Source | Adapter |
| Purification Method | Reverse Osmosis |
| Smart Home Compatibility | Not Smart Home Compatible |
| Supported Water TDS Level Maximum (PPM) | 2000 |
| UPC | 653590999287 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 100 Degrees Fahrenheit |

## Product Details

- **Brand:** tankRo
- **Capacity:** 3 gallons
- **Included Components:** Tank
- **Installation Type:** Under Sink
- **Material:** BPA Free
- **Package Information:** Tank
- **Power Source:** Adapter
- **Product Dimensions:** 9"L x 9"W x 14"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Durable

## Images

![GTS3 3 Gallon RO Water Filtration Expansion Tank, Compact | White Finish, Includes 1/4" Ball Valve, Durable Steel Construction, Universal Fit for RO Units - Image 1](https://m.media-amazon.com/images/I/61ttQ1+cTAL.jpg)

## Available Options

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

## Frequently Bought Together

- TankRO - RO Water Filtration System Expansion Tank - 3 Gallon Compact Reverse Osmosis Water Storage Pressure Tank With Free 1/4" Ball Valve
- 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)
- 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

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**Shop now:** [https://www.desertcart.us/products/66564551-gts3-3-gallon-ro-water-filtration-expansion-tank-compact-white](https://www.desertcart.us/products/66564551-gts3-3-gallon-ro-water-filtration-expansion-tank-compact-white)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-22*