---
product_id: 12636522
title: "tankRo RO132-TNK RO Water Filtration System Expansion Tank 4 Gallon Capacity – NSF Certified – Compact Reverse Osmosis Water Storage Pressure Tank 1/4\" Tank Ball Valve"
brand: "express water"
price: "$373"
currency: NZD
in_stock: true
reviews_count: 9
category: "Express Water"
url: https://www.desertcart.nz/products/12636522-tankro-ro132-tnk-ro-water-filtration-system-expansion-tank-4
store_origin: NZ
region: New Zealand
---

# 4 Gallon Capacity 100 PSI Max Pressure 1/4" Quick Connect Valve tankRo RO132-TNK RO Water Filtration System Expansion Tank 4 Gallon Capacity – NSF Certified – Compact Reverse Osmosis Water Storage Pressure Tank 1/4" Tank Ball Valve

**Brand:** express water
**Price:** $373
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with pressure-perfect purity!

## Quick Answers

- **What is this?** tankRo RO132-TNK RO Water Filtration System Expansion Tank 4 Gallon Capacity – NSF Certified – Compact Reverse Osmosis Water Storage Pressure Tank 1/4" Tank Ball Valve by express water
- **How much does it cost?** $373 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/12636522-tankro-ro132-tnk-ro-water-filtration-system-expansion-tank-4)

## Best For

- express water enthusiasts

## Why This Product

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

## Key Features

- • **Built to Endure:** Heavy-duty deep-drawn steel domes with precision welding and epoxy/polyurethane finish for long-lasting durability.
- • **Certified Peace of Mind:** NSF certified components ensure your water stays safe, odorless, and tasteless every time.
- • **Compact & Versatile Fit:** Designed at 15"x12"x12" to fit snugly under most kitchen sinks, working upright or on its side.
- • **Effortless Installation:** Includes a free 1/4" quick connect tank ball valve for seamless setup and hassle-free replacement.
- • **On-Demand Pure Hydration:** Stores 3.2 gallons of contaminant-free water for instant access to crisp, clean drinking water.

## Overview

The tankRO RO132-TNK is a compact, NSF-certified 4-gallon reverse osmosis water storage tank engineered for durability and convenience. Featuring a 100 PSI maximum pressure rating, a free 1/4" quick connect ball valve, and a robust steel construction with epoxy coating, it fits under most kitchen sinks and delivers on-demand, contaminant-free water with reliable pressure. Ideal for professionals seeking a sleek, efficient upgrade to their RO systems.

## Description

The tankRO 4 Gallon Water Storage Tank gives tasteless, odorless, and contaminant free water. Get a quality tank you can rely on today. The post cured diaphragm means sterile water distribution to keep your water safe. The water reservoir can hold up to 3.2 gallons of water at once, with the rest of the storage area being occupied by the pre pressurized air bladder, which helps you draw water from the tank. This tank comes with a free Tank Ball Valve and a free Tank Stand. All components are NSF Certified. Designed to fit under sinks this water holding tank will fit most kitchen cabinets, it is made to work when lying on its side or upright. Maximum working pressure of the tank is 100 PSI. The tank is also designed to survive the outdoor elements with a two part epoxy primer and polyurethane paint finish. This is a fully functional pressure tank for water wells. The water accumulator chamber of the tank includes the highest grade of polypropylene, virgin polypropylene, meaning you have the most durable and smooth inside lining. This tank is built to last with heavy duty commercial construction with durable deep drawn steel domes and precision welded seams. Improve your water today.

Review: Perfect replacement/upgrade - Works great, even better than the original glacier bay that came with my RO system.
Review: Simple and works for good price - Simple hookup. Works great! Eliminated pulsing (on/off) of a tankless/pumped RO water filter system connected to fridge and coffee maker. Now I have good pressure at every fixture served by RO water filter system

## Features

- Reverse Osmosis Tank: 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.
- Every water tank is rigorously tested for quality and durability.
- 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 (15 x 12 x 12) to fit under most kitchen sinks. Stores up to 3.2 gallons of water for on-demand filtered drinking water.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00Q798N8E |
| Air Flow Capacity | 1 Cubic Feet Per Minute |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #8,474 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #23 in Under-Sink & Countertop Filtration |
| Brand | EXPRESS WATER |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,139) |
| Date First Available | November 26, 2014 |
| Global Trade Identification Number | 00641990965834 |
| Installation Type | Under Sink |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 7.65 pounds |
| Item model number | RO132-TNK |
| Manufacture Year | 2022 |
| Manufacturer | Express Water |
| Maximum Pressure | 100 Pound per Square Inch |
| Measurement System | US |
| Model Name | V-RO132-TNK |
| Operating Pressure Range | 100 PSI |
| Package Information | Tank |
| Part Number | V-RO132-TNK |
| Power Source | Adapter |
| Product Dimensions | 15"L x 12"W x 12"H |
| Size | 4 Gallons |
| Special Feature | Durability |
| Special Features | Durability |
| Style | Water Tank |
| Supported Water TDS Level Maximum (PPM) | 500 |
| UPC | 641990965834 |
| Upper Temperature Rating | 100 Degrees Fahrenheit |
| Warranty Description | 1-Year Warranty |

## Product Details

- **Brand:** EXPRESS WATER
- **Capacity:** 4 Gallons
- **Included Components:** 4-Gallon Water Storage Tank, Tank Ball Valve, Tank Stand
- **Installation Type:** Under Sink
- **Material:** Alloy Steel
- **Package Information:** Tank
- **Power Source:** Adapter
- **Product Dimensions:** 15"L x 12"W x 12"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Durability

## Images

![tankRo RO132-TNK RO Water Filtration System Expansion Tank 4 Gallon Capacity – NSF Certified – Compact Reverse Osmosis Water Storage Pressure Tank 1/4" Tank Ball Valve - Image 1](https://m.media-amazon.com/images/I/617s2+SsU8L.jpg)

## Questions & Answers

**Q: what country made in?**
A: They’re made in Taiwan per the printing on the box which the tank arrived within.

**Q: 4 gallon okay in place of 3.2 gallon tank**
A: Yes I bought the 4.o gallon unit and it works fine.  I checked the pressure in the tank and had to pump it up to 8.0 psi for my system.

**Q: Will this work with a watts WP-4V and similar systems?**
A: It is a universal unit and will work with all RO systems. It may require an adopter based on tube size. Thx

**Q: has anyone checked their stored water for leeching chemicals?**
A: i have had my water checked for LEAD recently, no issues

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect replacement/upgrade
*by N***9 on January 12, 2026*

Works great, even better than the original glacier bay that came with my RO system.

### ⭐⭐⭐⭐⭐ Simple and works for good price
*by W***W on November 3, 2025*

Simple hookup. Works great! Eliminated pulsing (on/off) of a tankless/pumped RO water filter system connected to fridge and coffee maker. Now I have good pressure at every fixture served by RO water filter system

### ⭐⭐⭐⭐⭐ Works well
*by A***R on January 5, 2026*

As advertised. Worked great for my home RO system

## Frequently Bought Together

- tankRo RO132-TNK RO Water Filtration System Expansion Tank 4 Gallon Capacity – NSF Certified – Compact Reverse Osmosis Water Storage Pressure Tank 1/4" Tank Ball Valve
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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-18*