---
product_id: 68236095
title: "18 Litre Aquasystems ARB18 Potable Expansion Vessel 3 Bar with Integrated Bracket - XVES050055"
brand: "aquasystems"
price: "€ 78.54"
currency: EUR
in_stock: false
url: https://www.desertcart.it/products/68236095-18-litre-aquasystems-arb18-potable-expansion-vessel-3-bar-integrated
store_origin: IT
region: Italy
---

# WRAS approved 18L capacity integrated bracket 18 Litre Aquasystems ARB18 Potable Expansion Vessel 3 Bar with Integrated Bracket - XVES050055

**Brand:** aquasystems
**Price:** € 78.54
**Availability:** ❌ Out of Stock

## Summary

> 💦 Elevate Your Water Storage Game!

## Quick Answers

- **What is this?** 18 Litre Aquasystems ARB18 Potable Expansion Vessel 3 Bar with Integrated Bracket - XVES050055 by aquasystems
- **How much does it cost?** € 78.54 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/68236095-18-litre-aquasystems-arb18-potable-expansion-vessel-3-bar-integrated)

## Best For

- aquasystems enthusiasts

## Why This Product

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

## Key Features

- • **Durable Design:** Replaceable EPDM membrane for long-lasting use.
- • **Certified Quality:** WRAS approved for peace of mind.
- • **Maximize Your Space:** Integrated wall bracket for easy installation.
- • **Reliable Performance:** 18-litre capacity ensures ample potable water supply.
- • **Effortless Maintenance:** No batteries required, hassle-free operation.

## Overview

The 18 Litre Aquasystems ARB18 Potable Expansion Vessel is designed for efficient water storage, featuring a robust integrated wall bracket, a replaceable EPDM membrane, and WRAS approval, ensuring both quality and convenience for your potable water needs.

## Description

18 Litre Aquasystems ARB18 Potable Expansion Vessel 3 Bar with Integrated Bracket - XVES050055 The Aquasystems ARB Potable Expansion Vessels are manufactured to comply with UK water regulations and are tested and certified by WRAS. The vessels are supplied with a replaceable membrane and feature an integrated wall bracket. They come complete with wall bracket accessories as pictured. The main purpose of the vessel is to compensate for the increase in volume of water due to the varying water temperatures in the system, e.g. Water being heated from 0°C - 100°C will increase by approx 4.5%. Features: * Aquasystems potable water expansion vessel * Vessel incorporates an integrated wall bracket * Comes with wall bracket accessories as pictured * White Epoxy coated steel container * Replaceable EPDM membrane * Pre-Charge: 3 Bar * Maximum Pressure: 10.0 * Test Pressure: 10.0 * Temperature Range: -10°C - 100°C * Suitable for Fluid Group 2 * WRAS Approved Specification: * Capacity: 18 Litre * Pre-Charge: 3 Bar * Maximum Pressure: 10.0 * Test Pressure: 10.0 * Temperature Range: -10°C - 100°C * Suitable for Fluid Group 2

## Features

- Potable Water Expansion Vessel
- 18 Litre Capacity
- Integrated Wall Bracket
- Replaceable EPDM membrane
- WRAS Approved

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Reliance Water Controls |
| Part Number | XVES050055 |
| Manufacturer reference | XVES050055 |
| Colour | White |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | No |

## Images

![18 Litre Aquasystems ARB18 Potable Expansion Vessel 3 Bar with Integrated Bracket - XVES050055 - Image 1](https://m.media-amazon.com/images/I/41LT+nkA5NL.jpg)
![18 Litre Aquasystems ARB18 Potable Expansion Vessel 3 Bar with Integrated Bracket - XVES050055 - Image 2](https://m.media-amazon.com/images/I/81SJxHb8J9L.jpg)

## Questions & Answers

**Q: Hi what size is the flexi pipe fitting . Am I correct in sayin 3/4 inch. Thanks very much**
A: Good Morning, 
The fitting is indeed 3/4 on this vessel.

**Q: Need replacement for aquasystem arb18 [m/f date april 2014] that came with gledhill unvented. will it fit the existing bracket?**
A: This should fit a small wall bracket as per the original one that was provided & installed originally.
This is a direct replacement. The B of ARB18 designates its the bracket fitting.

**Q: Hi is this vessel pre charged to 3 bar. Many thanks.**
A: Good Morning, 
Yes I can confirm this vessel is pre-charged to 3 bar

**Q: What are the dimensions of this item?**
A: H x 465mm - D x 280mm

## Frequently Bought Together

- 18 Litre Aquasystems ARB18 Potable Expansion Vessel 3 Bar with Integrated Bracket - XVES050055
- Caleffi Multibloc Cold Water Control Valve 533112CST 3 & 6 Bar - Circlip
- Caleffi – 6 Bar Pressure Relief Valve Circlip Connection F0000412

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**Shop now:** [https://www.desertcart.it/products/68236095-18-litre-aquasystems-arb18-potable-expansion-vessel-3-bar-integrated](https://www.desertcart.it/products/68236095-18-litre-aquasystems-arb18-potable-expansion-vessel-3-bar-integrated)

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-25*