---
product_id: 256163481
title: "APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank"
brand: "apec water"
price: "€ 305.87"
currency: EUR
in_stock: true
category: "Apec Water"
url: https://www.desertcart.gr/products/256163481-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized
store_origin: GR
region: Greece
---

# 4 gal pre-pressurized capacity vertical/horizontal discharge food-grade, certified bladder APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank

**Brand:** apec water
**Price:** € 305.87
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with the RO tank that keeps pace with your lifestyle!

## 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?** € 305.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/256163481-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

- • **Premium Safety & Durability:** Food-grade bladder and CE-certified materials ensure leak-proof, odor-free water storage you can trust.
- • **Seamless System Integration:** 1/4 inch male pipe thread inlet/outlet designed specifically for reverse osmosis systems for effortless connectivity.
- • **Consistent Hydration, No Wait:** Pre-pressurized 4-gallon tank delivers up to 3.2 gallons of purified water instantly, perfect for busy households.
- • **Flexible Installation, Zero Hassle:** Engineered for both vertical and horizontal placement with included tank stand—fits seamlessly into any under-sink setup.
- • **Trusted by Thousands, Rated 4.6⭐:** Join over 2,400 satisfied users who upgraded their water quality and flow with this industry-standard tank.

## Overview

The APEC Water Systems Tank-4 is a 4-gallon pre-pressurized reverse osmosis water storage tank designed for residential use. It efficiently holds up to 3.2 gallons of purified water and supports both vertical and horizontal installation. Constructed with a food-grade bladder and certified materials, it guarantees safe, odor-free, and leak-proof water storage. Featuring stainless steel connectors and a 1/4 inch male pipe thread inlet/outlet, it integrates seamlessly with most RO systems. Highly rated by thousands, this durable tank is ideal for average to large families seeking reliable, high-volume purified water on demand.

## Description

Buy APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Asin | B00LU28SHE |
| Best Sellers Rank | #195 in Under-Sink Water Filters |
| Date First Available | 20 April 2015 |
| Is Discontinued By Manufacturer | No |
| Item Model Number | TANK-4 |
| Manufacturer | APEC Water Systems |
| Product Dimensions | 27.94 x 27.94 x 36.83 cm; 900 g |

## Product Details

- **Brand:** APEC WATER
- **Capacity:** 4 gallons
- **Material:** Stainless Steel
- **Product dimensions:** 27.9L x 27.9W x 36.8H centimeters
- **Special features:** 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/61qErEepoSL.jpg)

## Available Options

This product comes in different **Style** 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.

## 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)
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**Shop now:** [https://www.desertcart.gr/products/256163481-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized](https://www.desertcart.gr/products/256163481-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-27*