---
product_id: 11011230
title: "APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank"
brand: "apec water"
price: "¥43898"
currency: JPY
in_stock: true
category: "Apec Water"
url: https://www.desertcart.jp/products/11011230-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized
store_origin: JP
region: Japan
---

# 4-gallon 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:** ¥43898
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with APEC’s premium RO storage tank—because pure water waits for no one.

## 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?** ¥43898 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/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

- • **Safe & Pure Every Time:** Food-grade bladder and CE-certified materials ensure your water stays fresh, odor-free, and contaminant-free.
- • **Built to Last, Built for You:** Durable stainless steel connectors and leak-proof polypropylene reservoir guarantee long-term reliability.
- • **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 space.
- • **Globally Certified, Trusted Worldwide:** Individually pressure-tested and certified for safety and quality, making it a top choice for discerning professionals.

## Overview

The APEC Water Systems Tank-4 is a 4-gallon pre-pressurized reverse osmosis storage tank designed for residential use. It holds up to 3.2 gallons of purified water and supports both vertical and horizontal installation. Constructed with food-grade, CE-certified materials and stainless steel connectors, it ensures safe, odor-free water storage. Pressure-tested for durability and reliability, this tank is ideal for average to large households seeking consistent, high-quality water supply.

## 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)

## 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 |
| Best Sellers Rank | #5,054 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Undersink Water Filtration Replacement Parts |
| Brand Name | APEC WATER |
| Capacity | 4 gallons |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,285) |
| Global Trade Identification Number | 00854961005310 |
| Included Components | TANK-4 |
| Item Dimensions L x W x H | 11"L x 11"W x 14.5"H |
| Item Type Name | Reverse Osmosis Tank |
| Item Weight | 0.9 Kilograms |
| Manufacturer | APEC Water Systems |
| Manufacturer Part Number | TANK-4 |
| Material Type | Stainless Steel |
| Model Number | TANK-4 |
| Smart Home Compatibility | Not Smart Home Compatible |
| Specification Met | certified frustration-free |
| UPC | 854961005310 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** APEC WATER
- **Capacity:** 4 gallons
- **Color:** White
- **Material:** Stainless Steel
- **Product Dimensions:** 11"L x 11"W x 14.5"H

## 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 **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.

## 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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**Shop now:** [https://www.desertcart.jp/products/11011230-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized](https://www.desertcart.jp/products/11011230-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-17*