---
product_id: 11011230
title: "APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank"
brand: "apec water"
price: "VT26536"
currency: VUV
in_stock: true
reviews_count: 13
category: "Apec Water"
url: https://www.desertcart.vu/products/11011230-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized
store_origin: VU
region: Vanuatu
---

# 4 Gallon pre-pressurized capacity Vertical & horizontal discharge versatility Food-grade bladder, certified safety APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank

**Brand:** apec water
**Price:** VT26536
**Availability:** ✅ In Stock

## Summary

> 💧 Stay hydrated, stay ahead — premium RO storage that keeps your water fresh and flowing!

## Quick Answers

- **What is this?** APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank by apec water
- **How much does it cost?** VT26536 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/11011230-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized)

## Best For

- apec water enthusiasts

## Why This Product

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

## Key Features

- • **Flexible Installation:** Discharges efficiently in both vertical and horizontal positions with included tank stand.
- • **Reliable 4 Gallon Capacity:** Stores up to 3.2 gallons of purified water, perfect for busy households.
- • **Certified Food-Grade Safety:** Constructed with a food-grade bladder and CE-certified materials for pure, odor-free water.
- • **Pressure-Tested for Peace of Mind:** Individually tested to guarantee safety and durability for your family’s hydration needs.
- • **Durable Stainless Steel Connectors:** Ensures leak-free, long-lasting performance without compromising water quality.

## Overview

The APEC Water Systems Tank-4 is a 4-gallon pre-pressurized reverse osmosis water storage tank designed for residential use. It holds up to 3.2 gallons of purified water and supports both vertical and horizontal discharge. Featuring a food-grade bladder and stainless steel connectors, it ensures safe, odor-free water storage. Certified and pressure-tested for durability and safety, this tank is ideal for average to large households seeking reliable, high-quality RO water storage.

## Description

Our standard ro water tanks offer quality water storage for use with most residential Reverse osmosis systems. Built with stainless steel construction, these durable tanks will deliver a continuous and stable supply of purified water at a fast flow rate with high volume suitable for average to large size families. Supported by fully enclosed polypropylene and butyl reservoirs, these storage tanks provide airtight protection against leaks. Their stainless steel connectors ensure leach-free integrity while post-cured diaphragms eliminate the possibility of odors from the tank. Individually pressure-tested for safety, all our tanks are certified and ce approved for materials quality, safety, and durability making them suitable for use anywhere in the world. Specifications: dimensions: 11 inch D x 15 inch h WEIGHT: 10 Lbs. Optional tank ball valve: 1/4 inch connection to 1/4 inch or 3/8 inch tube size (not included with the tank)

Review: Great little RO tank - Works great, easy to install, I replaced a 10 year old tank that started leaking at the Schrader valve, this tank did the trick. Amazing volume of water before it starts to slow.
Review: Its Great!!!! - Works great! I got the water pressure back. Easy to install.

## Features

- Pre-pressurized 4 gallon water storage tank (holds up to 3.2 gallon of water)
- Discharge efficiently in a vertical or horizontal position with tank stand
- Food grade bladder and certified to ensure quality, safety and durability
- Inlet/outlet connection: 1/4 inch male pipe thread. Special designed for ro application

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00LU28SHE |
| Batteries Included? | No |
| Batteries Required? | No |
| Brand | APEC WATER |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,209) |
| Date First Available | July 15, 2014 |
| Global Trade Identification Number | 00854961005310 |
| Installation Type | Under Sink |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 1.98 pounds |
| Item model number | TANK-4 |
| Manufacturer | APEC Water Systems |
| Model Name | TANK-4 |
| Package Information | Tank |
| Part Number | TANK-4 |
| Pattern | Tank |
| Product Dimensions | 11"L x 11"W x 14.5"H |
| Size | 4 Gallons |
| Special Feature | Heavy Duty |
| Special Features | Heavy Duty |
| Style | TANK-4 |
| Supported Water TDS Level Maximum (PPM) | 500 |
| UPC | 854961005310 |

## Product Details

- **Brand:** APEC WATER
- **Capacity:** 4 Gallons
- **Included Components:** TANK-4
- **Installation Type:** Under Sink
- **Item Weight:** 0.9 Kilograms
- **Material:** Stainless Steel
- **Package Information:** Tank
- **Product Dimensions:** 11"L x 11"W x 14.5"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Heavy Duty

## Images

![APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank - Image 1](https://m.media-amazon.com/images/I/31Z397O2DaL.jpg)
![APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank - Image 2](https://m.media-amazon.com/images/I/41FuRfwASbL.jpg)
![APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank - Image 3](https://m.media-amazon.com/images/I/516ArXR7MXL.jpg)
![APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank - Image 4](https://m.media-amazon.com/images/I/51YlSG43g5L.jpg)
![APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank - Image 5](https://m.media-amazon.com/images/I/51mThyJsf7L.jpg)

## Available Options

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

## Questions & Answers

**Q: What is the recommended pressure for this expansion tank?**
A: They come pressurized from the manufacturer with a required 4-6 psi.

**Q: What is the size of the male threaded fitting on the top?  3/8"?**
A: Size? Mine is in storage so not sure . The thread is tapered for a tight fit. Check APEC web site. It likely is the 3/8". Appears to be less than 1/2" and for sure more than 1/4"

**Q: What is the recommended pressure for this expansion tank?**
A: Label on my tank says 100 psi max.
At one point, my tank was not putting out much water. I hooked up a pump which said there was about 20psi in the tank. I charged it to 95 and it works like it did when it was new.

**Q: I need replacement tank for my Ecowater ero335. Is this a comparable model. The company here says everything out there is plastic.**
A: I do t know if this will fit your exact model. But it should. just make sure the intake/outtake valve is the same size as your current tank. This one is definitely not plastic and the water has tasted great.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great little RO tank
*by A***R on November 26, 2025*

Works great, easy to install, I replaced a 10 year old tank that started leaking at the Schrader valve, this tank did the trick. Amazing volume of water before it starts to slow.

### ⭐⭐⭐⭐⭐ Its Great!!!!
*by A***N on December 4, 2025*

Works great! I got the water pressure back. Easy to install.

### ⭐⭐⭐⭐⭐ Does your APEC system act like its prostate is inflamed?
*by A***R on December 12, 2025*

I bought my APEC system in 2018. I've done yearly filter changes, and the occasional RO filter replacement. The system ran great. Then several weeks ago, I noticed the water was coming out in much lower quantities. I could maybe get half a liter out and then it would just dribble. It was like it had an inflamed prostate. I read some other reviews and decided to buy this tank. Problem fixed! I get a nice, full flow of water and much more than a little tinkle. The tanks are only supposed to be good for five years, and then the diaphragm inside them slowly loses pressure which means the tank will fill, but you won't get very much water out of it since the diaphragm has lost pressure. After I removed the old tank it was almost full and there was over 2 gallons of water still in it that wouldn't come out of the faucet anymore.

## Frequently Bought Together

- APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank
- 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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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-09*