---
product_id: 334383777
title: "APEC Water Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank"
brand: "apec water"
price: "$802.89"
currency: USD
in_stock: true
reviews_count: 5
category: "Apec Water"
url: https://www.desertcart.us/products/334383777-apec-water-tank-4-4-gallon-pre-pressurized-water-storage
store_origin: US
region: United States of America
---

# 4 gal pre-pressurized capacity 1/4 inch inlet/outlet pipe thread NSF certified food-grade bladder APEC Water Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank

**Brand:** apec water
**Price:** $802.89
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** APEC Water Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank by apec water
- **How much does it cost?** $802.89 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/334383777-apec-water-tank-4-4-gallon-pre-pressurized-water-storage)

## 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

- • **Effortless Upgrade:** Easy installation with standard 1/4 inch fittings—perfect for upgrading any RO system.
- • **Compact & Versatile:** Fits under sinks with vertical or horizontal installation options using included stand.
- • **Optimized Water Flow:** Delivers up to 0.8 GPM with stable pressure for uninterrupted hydration.
- • **Leak-Proof Durability:** Pressure-tested and built with stainless steel connectors for long-lasting, leak-free use.
- • **Premium Safety Standards:** NSF certified stainless steel and food-grade bladder ensure pure, odor-free water.

## Overview

The APEC Water Tank-4 is a 4-gallon pre-pressurized storage tank designed for residential reverse osmosis systems. Featuring a food-grade bladder and stainless steel construction, it ensures safe, odor-free water storage. Certified by NSF and CE, it supports efficient water discharge at up to 0.8 gallons per minute and fits conveniently under sinks with versatile installation options. Ideal for millennial professionals seeking reliable, high-quality hydration solutions that blend seamlessly into modern lifestyles.

## 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: So far, so good! - I bought this to replace the stock tank for my RO system from GE. The old tank was barely putting out two cups of water at a time. However, the stock replacement was going to be around $150, so I was looking for a cheaper option. Since this tank is carried by the same store that I bought the RO system from, and they have it labeled as an "industry standard" in terms of pressure settings, I decided to give it a try. And so far, it works great! Much better pressure, and I get a lot more water out of the system at a time. Notably too, the water tastes better! Maybe because it's not mixing with old, stagnant water that can't be expelled. Super easy to install! Bought a shut off valve fitting to connect the tank to the plastic line of my system, and managed to connect it easily. Be sure to use plumbers tape on the fitting. I also used an O-ring for good measure. So far, no issues with leaking, as other people are reporting in their reviews.
Review: 10 - ممتاز 💯💯💯💯💯

## 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 |
| Brand | APEC WATER |
| Brand Name | APEC WATER |
| Capacity | 4 Gallons |
| Container Type | Tank |
| Country Of Origin | USA |
| Customer Reviews | 4.6 out of 5 stars 2,412 Reviews |
| Global Trade Identification Number | 00854961005310 |
| Included Components | TANK-4 |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 11L x 17W x 15H Centimeters |
| Item Type Name | water purifier |
| Item Weight | 0.9 Kilograms |
| LowerTemperature Range | 33 Degrees Fahrenheit |
| Manufacturer | APEC Water Systems |
| Manufacturer Part Number | TANK-4 |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| Maximum Flow Rate | 0.8 Gallons Per Minute |
| Model Name | UFF |
| Model Number | TANK-4 |
| Operating Pressure Range | 5-100 PSI |
| Other Special Features of the Product | NSF certified |
| Packer Contact Information | APEC Water Systems |
| Power Source Type | Corded Electric |
| Product Dimensions | 11L x 17W x 15H Centimeters |
| Purification Method | Reverse Osmosis |
| Special Feature | NSF certified |
| Supported Water TDS Level Maximum (PPM) | 5 |
| UPC | 854961005310 |
| Unit Count | 1 Count |
| Whats in the box? | TANK-4 |

## Product Details

- **Brand:** APEC WATER
- **Capacity:** 4 Gallons
- **Material:** Stainless Steel
- **Product Dimensions:** 11L x 17W x 15H Centimeters
- **Special Feature:** NSF certified

## Images

![APEC Water Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank - Image 1](https://m.media-amazon.com/images/I/61qErEepoSL.jpg)
![APEC Water Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank - Image 2](https://m.media-amazon.com/images/I/717Hczyv8gL.jpg)
![APEC Water Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank - Image 3](https://m.media-amazon.com/images/I/71aOw3xUCNL.jpg)
![APEC Water Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank - Image 4](https://m.media-amazon.com/images/I/713rLh1lugL.jpg)
![APEC Water Tank-4, 4 Gallon Pre-Pressurized Water Storage Tank - Image 5](https://m.media-amazon.com/images/I/71poldwHLRL.jpg)

## 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

### ⭐⭐⭐⭐⭐ So far, so good!
*by C***R on 3 December 2024*

I bought this to replace the stock tank for my RO system from GE. The old tank was barely putting out two cups of water at a time. However, the stock replacement was going to be around $150, so I was looking for a cheaper option. Since this tank is carried by the same store that I bought the RO system from, and they have it labeled as an "industry standard" in terms of pressure settings, I decided to give it a try. And so far, it works great! Much better pressure, and I get a lot more water out of the system at a time. Notably too, the water tastes better! Maybe because it's not mixing with old, stagnant water that can't be expelled. Super easy to install! Bought a shut off valve fitting to connect the tank to the plastic line of my system, and managed to connect it easily. Be sure to use plumbers tape on the fitting. I also used an O-ring for good measure. So far, no issues with leaking, as other people are reporting in their reviews.

### ⭐⭐⭐⭐⭐ 10
*by U***E on 2 July 2025*

ممتاز 💯💯💯💯💯

### ⭐⭐⭐⭐⭐ APEC Fresh Water Holding Tank Performs Excellent Daily !
*by R***E on 23 July 2026*

Excellent product and always functions perfectly! Thank you!

## 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 United States of America*
*Store origin: US*
*Last updated: 2026-08-06*