---
product_id: 49212828
title: "Ariston Water Heater Expansion Vessel Kit A"
brand: "ariston"
price: "¥24430"
currency: JPY
in_stock: true
reviews_count: 8
category: "Ariston"
url: https://www.desertcart.jp/products/49212828-ariston-water-heater-expansion-vessel-kit
store_origin: JP
region: Japan
---

# 2L capacity 10 bar max pressure Compact & easy install Ariston Water Heater Expansion Vessel Kit A

**Brand:** ariston
**Price:** ¥24430
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water heater game with Ariston’s sleek expansion vessel kit!

## Quick Answers

- **What is this?** Ariston Water Heater Expansion Vessel Kit A by ariston
- **How much does it cost?** ¥24430 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/49212828-ariston-water-heater-expansion-vessel-kit)

## Best For

- ariston enthusiasts

## Why This Product

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

## Key Features

- • **Compact 2L Expansion Vessel:** Optimized size for seamless integration with Ariston heaters
- • **Integrated 15mm Check Valve:** Built-in safety feature to prevent backflow and ensure system integrity
- • **Robust 10 Bar Pressure Rating:** Engineered to handle high-pressure demands safely
- • **Lightweight & Space-Saving Design:** Only 1.5kg for effortless installation in tight spaces
- • **Trusted Ariston Quality & Warranty:** Backed by 12 months manufacturer warranty and premium materials

## Overview

The Ariston Water Heater Expansion Vessel Kit A features a 2-litre capacity vessel designed to handle up to 10 bars of pressure, ensuring optimal performance and safety for your water heating system. Its compact, lightweight design (1.5kg) allows for easy installation, complemented by an integrated 15mm check valve to prevent backflow. Crafted from durable brass and stainless steel, this kit is a reliable accessory backed by a 12-month manufacturer warranty, making it a smart upgrade for any Ariston water heater user.

## Description

Ariston Water Heater Expansion Vessel Kit A Pack Contains: 2 Litre Expansion Vessel 15mm Check Valve Suitable for Ariston Water Heaters

Review: Quality accumulator - Very good quality accumulator definate value for money. Easy installation with compact design, meaning less space taken up by system installation. Excellent buy.
Review: Easy fit expansion vessel - Nice and compact expansion vessel easy to fit with most basic tools ,you will need to get a pipe T connection ...compression or push fit or a solder joint if you like, it came with check valve Very quick delivery

## Features

- Ariston Water Heater Expansion Vessel Kit A
- Capacity 2 litres
- Weight 1.5kg
- Max pressure 10 bar

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00QVMB9KG |
| Best Sellers Rank | 91,047 in DIY & Tools ( See Top 100 in DIY & Tools ) 176 in Water Heaters & Parts |
| Brand | Ariston |
| Capacity | 2 litres |
| Colour | White |
| Customer Reviews | 4.4 out of 5 stars 249 Reviews |
| Is Electric | No |
| Manufacturer | Ariston |
| Manufacturer Warranty Description | 12 months. |
| Material | Brass , Stainless Steel |
| Maximum Pressure | 10 Bars |
| Model Number | 445190 |
| Mount Type | internal |
| Special Features | Check Valve Safety Feature |
| Special feature | Check Valve Safety Feature |
| Style | Water Heater Accessory |
| UPC | 708747445190 |

## Product Details

- **Brand:** Ariston
- **Capacity:** 2 litres
- **Special feature:** Check Valve Safety Feature
- **Colour:** White
- **Material:** Brass, Stainless Steel

## Images

![Ariston Water Heater Expansion Vessel Kit A - Image 1](https://m.media-amazon.com/images/I/61nQlF8a8jL.jpg)

## Questions & Answers

**Q: Is this expansion vessel is pre-charged on delivery and what is the pre-charged pressure?**
A: The pressure vessel is pre-charged at 3.5 bar.

**Q: Will this stop continual dripping from pressure relief valve on my 10ltr unvented water heater**
A: Yes. It is necessary to allow for expansion. Hot water expands by up to 10% and the vessel allows for this. If you don’t fit then the pressure forces it’s way out via the tap (dripping) or out of the pressure relief valve.

**Q: what fitting do i need to connect this to my 15mm pipe work?**
A: I suggest you take the vessel to a plumbers merchant and ask them to give you an adapter from the thread on the vessel to 15mm pipe.

**Q: Is the membrane made from epdm rubber?**
A: It is synthetic rubber but I cant say if it is EPDM, Nitrile , or something else.  I cannot think of any water component that would cause a problem with those.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality accumulator
*by L***S on 17 January 2022*

Very good quality accumulator definate value for money. Easy installation with compact design, meaning less space taken up by system installation. Excellent buy.

### ⭐⭐⭐⭐⭐ Easy fit expansion vessel
*by R***. on 3 November 2021*

Nice and compact expansion vessel easy to fit with most basic tools ,you will need to get a pipe T connection ...compression or push fit or a solder joint if you like, it came with check valve Very quick delivery

### ⭐⭐⭐⭐ Expansion vessel
*by T***Y on 30 November 2025*

This goes alongside with my all under sink heater been in the flat now for four years and no problems with it

## Frequently Bought Together

- Ariston Water Heater Expansion Vessel Kit A
- Ariston 406802 KIT B 3.5 BAR Pressure REDUCING Valve, Bronze
- Ariston 406807 KIT C Discharge TUNDISH (15MM-22MM), Black

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-04*