---
product_id: 334383777
title: "APEC Water Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank"
brand: "apec water"
price: "₨162837"
currency: LKR
in_stock: true
reviews_count: 5
category: "Apec Water"
url: https://www.desertcart.lk/products/334383777-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized
store_origin: LK
region: Sri Lanka
---

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

**Brand:** apec water
**Price:** ₨162837
**Availability:** ✅ In Stock

## Summary

> 💧 Stay hydrated, stay ahead — premium RO storage for the savvy home.

## 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?** ₨162837 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/334383777-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

- • **Versatile 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 Safety & Durability:** Food-grade bladder and CE/NSF certifications ensure clean, odor-free water storage.
- • **Pressure-Tested for Peace of Mind:** Individually tested to guarantee safety and consistent performance worldwide.
- • **Leak-Proof Stainless Steel Connectors:** Maintains water purity with corrosion-resistant, leach-free fittings.

## 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 installation. Featuring a food-grade bladder and stainless steel connectors, it is certified for safety, durability, and odor-free performance. Ideal for medium to large households, this NSF and CE-approved tank ensures a reliable, leak-proof water supply with fast flow rates.

## 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: Works OK 2 weeks in
Review: BUENA CAPACIDAD

## 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 |
| Are batteries included? | No |
| Brand | APEC WATER |
| Colour | White |
| Country of Origin | USA |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,324) |
| Date First Available | 20 April 2015 |
| Generic Name | water purifier |
| Global Trade Identification Number | 00854961005310 |
| Installation Type | Under Sink |
| Item Weight | 900 g |
| Item model number | TANK-4 |
| Manufacturer | APEC Water Systems |
| Model Name | UFF |
| Model number | TANK-4 |
| Net Quantity | 1 Count |
| Number of Memory Sticks | 1 |
| Package Information | Tank |
| Packer | APEC Water Systems |
| Power Source | Manual (No Power Source Required) |
| Product Dimensions | 11L x 17W x 15H Centimeters |
| Special Feature | NSF certified |
| Supported Water TDS Level Maximum (PPM) | 5 |
| UPC | 854961005310 |

## 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 Systems Tank-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank - Image 1](https://m.media-amazon.com/images/I/71yb+3-D5lL.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

### ⭐⭐⭐⭐⭐ Review
*by 7***R on 19 October 2025*

Works OK 2 weeks in

### ⭐⭐⭐⭐⭐ Review
*by J***O on 4 July 2024*

BUENA CAPACIDAD

### ⭐⭐⭐⭐⭐ Review
*by A***N on 4 December 2025*

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

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.lk/products/334383777-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized](https://www.desertcart.lk/products/334383777-apec-water-systems-tank-4-4-gallon-residential-pre-pressurized)

---

*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-05*