---
product_id: 285683322
title: "406801 KIT A 2L Expansion Vessel & Non-Return Valve, White"
brand: "ariston"
price: "AR$302045"
currency: ARS
in_stock: true
reviews_count: 5
category: "Ariston"
url: https://www.desertcart.com.ar/products/285683322-406801-kit-a-2l-expansion-vessel-and-non-return-valve
store_origin: AR
region: Argentina
---

# Non-return valve stops backflow 2L expansion capacity Prevents pressure build-up 406801 KIT A 2L Expansion Vessel & Non-Return Valve, White

**Brand:** ariston
**Price:** AR$302045
**Availability:** ✅ In Stock

## Summary

> 🛠️ Protect your home’s hot water system like a pro — no pressure, no worries!

## Quick Answers

- **What is this?** 406801 KIT A 2L Expansion Vessel & Non-Return Valve, White by ariston
- **How much does it cost?** AR$302045 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/285683322-406801-kit-a-2l-expansion-vessel-and-non-return-valve)

## 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

- • **Backflow Blocker:** Non-return valve ensures clean, uninterrupted water flow
- • **Compact & Efficient:** 2L vessel fits seamlessly with Ariston Andris heaters
- • **UKCA Certified Quality:** Trusted and compliant for UK installations
- • **Cost-Saving Reliability:** Avoid expensive pump replacements with this essential kit
- • **Pressure-Proof Performance:** Safeguards your heating system from costly pressure damage

## Overview

The Ariston 406801 KIT combines a 2L expansion vessel and a non-return valve designed to protect closed domestic water heating systems from excessive pressure and backflow. Perfectly compatible with Ariston Andris range heaters, this UKCA certified kit ensures reliable, maintenance-free operation while helping you avoid costly repairs.

## Description

The expansion vessel prevents any build-up of pressure within the domestic hot water system, while the non-return valve stops any backflow of hot water into the cold water main.Ideal to use with our Andris R or Andris Lux Eco water heaters.

Review: That thing saved me 1k for a water pump replacement.
Review: Mal funcionamiento valvula

## Features

- Set of 2L expansion vessel and non-return valve
- To protect closed water heating systems from excessive pressure
- For optional use with Ariston Andris range water heaters
- Model number: 406801
- Fully UKCA certified to be installed in the UK Market.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003ITQXFG |
| ASIN  | B003ITQXFG |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #191,129 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #197 in Central Heating Systems & Accessories |
| Color | White |
| Customer Reviews | 4.1 4.1 out of 5 stars (51) |
| Customer reviews | 4.1 4.1 out of 5 stars (51) |
| Date First Available | 15 October 2012 |
| Date First Available  | 15 October 2012 |
| Included components | 2L expansion vessel, non-return valve |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 1.02 Kilograms |
| Item model number | 406801 |
| Item model number  | 406801 |
| Manufacturer | Ariston |
| Manufacturer  | Ariston |
| Material | Alloy Steel |
| Part number | 406801 |
| Product Dimensions | 12.5 x 12.5 x 23.7 cm; 1.02 kg |
| Product Dimensions  | 12.5 x 12.5 x 23.7 cm; 1.02 kg |
| Size | 12.5 cm x 12.5 cm x 23.7 cm |
| Specification met | UKCA |

## Product Details

- **Brand:** Ariston
- **Exterior finish:** Stainless Steel
- **Inlet connection type:** Female Iron Pipe
- **Item dimensions L x W x H:** 12.5 x 12.5 x 23.7 centimeters
- **Material:** Alloy Steel

## Images

![406801 KIT A 2L Expansion Vessel & Non-Return Valve, White - Image 1](https://m.media-amazon.com/images/I/41pu2caeOwL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***N on 20 April 2024*

That thing saved me 1k for a water pump replacement.

### ⭐ Review
*by F***E on 9 December 2025*

Mal funcionamiento valvula

### ⭐⭐⭐⭐⭐ Review
*by S***G on 2 March 2023*

Came quickly and was soon put to use for the purpose it was designed for

## Frequently Bought Together

- Ariston 406801 KIT A 2L Expansion Vessel & Non-Return Valve, White
- Ariston 406802 KIT B 3.5 BAR Pressure REDUCING Valve, Bronze
- Ariston ANDRIS LUX ECO 15 L Undersink Electric Water Heater 2.5kW with A Titanium Enamelled Tank, A Class Erp Rating, Copper Heating Element, Manufactured To Be Installed In UK - 3100722, White

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**Shop now:** [https://www.desertcart.com.ar/products/285683322-406801-kit-a-2l-expansion-vessel-and-non-return-valve](https://www.desertcart.com.ar/products/285683322-406801-kit-a-2l-expansion-vessel-and-non-return-valve)

---

*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-11-07*