---
product_id: 263872325
title: "12 Litre Heating Expansion Vessel & Sealed System Kit Z1-301012"
brand: "zilmet"
price: "€ 274.85"
currency: EUR
in_stock: true
reviews_count: 8
category: "Zilmet"
url: https://www.desertcart.fi/products/263872325-12-litre-heating-expansion-vessel-and-sealed-system-kit-z1
store_origin: FI
region: Finland
---

# Compact 281x294mm size 90°C max operating temp 4 Bar max pressure 12 Litre Heating Expansion Vessel & Sealed System Kit Z1-301012

**Brand:** zilmet
**Price:** € 274.85
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your heating system with zero hassle and maximum efficiency! ⚙️

## Quick Answers

- **What is this?** 12 Litre Heating Expansion Vessel & Sealed System Kit Z1-301012 by zilmet
- **How much does it cost?** € 274.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/263872325-12-litre-heating-expansion-vessel-and-sealed-system-kit-z1)

## Best For

- zilmet enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Durable carbon steel shell ensures long-term reliability and corrosion resistance.
- • **Trusted Performance:** Proven to last 15+ years, backed by 4.6-star user satisfaction and top-tier build quality.
- • **Precision Pre-Charged:** Factory pre-charged at 2 Bar for hassle-free installation and optimal performance.
- • **Seamless Compatibility:** Includes expansion bracket and Tesla sealed system kit for a perfect, plug-and-play fit.
- • **Effortless Installation:** Designed for quick swap with identical fixing bracket—no downtime, no fuss.

## Overview

The Zilmet 12 Litre Heating Expansion Vessel & Sealed System Kit Z1-301012 is a robust, factory pre-charged expansion vessel designed for central heating systems. Featuring a durable carbon steel shell, synthetic rubber membrane, and a max working pressure of 4 Bar, it ensures reliable thermal expansion management up to 90°C. The kit includes a versatile expansion bracket and Tesla sealed system installation components, enabling straightforward, like-for-like replacement with minimal effort and long-lasting performance.

## Description

Zilmet - 12 Litre Heating Expansion Vessel & Sealed System Kit Z1-301012 Specifications: Max. Working Pressure: 4 Bar Max. Operating Temperature: 90°C Factory Pre-charge: 2 Bar Shell: Carbon Steel Connection: 3/4" MSP Carbon Steel Membrane: SBR Synthetic Rubber Height: 281mm Diameter: 294mm Includes: CAL-PRO 12 Heating Expansion Vessel Zilmet - Heating Vessel Expansion Bracket 8 12 18 24 Litre Tesla Sealed System Installation Kit - EVCKIT

Review: Done the job - Good value
Review: Like for like replacement. - Bought this to swap in for the exact same model of expansion vessel which had lasted 15 years but finally suffered a bladder failure. The swap was straight forward and the fixing bracket on this was identical to the in-place fixing bracket so no significant fiddling about was required to mount the new expansion vessel. It was pre-charged to 1.5bar, which was confirmed during fitting. Painless job to fit, and hopefully good for another decade and a half.

## Features

- Includes: Zilmet 12 Litre Heating Expansion Vessel
- Heating Vessel Expansion Bracket for 8 12 18 24 Litre
- Tesla Sealed System Installation Kit - EVCKIT

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08LZKYZ7C |
| Best Sellers Rank | 108,105 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,083 in Central Heating System Accessories |
| Customer Reviews | 4.6 4.6 out of 5 stars (43) |
| Date First Available | 27 Oct. 2020 |
| Item Package Quantity | 1 |
| Manufacturer | Zilmet |

## Images

![12 Litre Heating Expansion Vessel & Sealed System Kit Z1-301012 - Image 1](https://m.media-amazon.com/images/I/614q9vztY+L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Done the job
*by B***R on 13 September 2025*

Good value

### ⭐⭐⭐⭐⭐ Like for like replacement.
*by B***Y on 18 January 2025*

Bought this to swap in for the exact same model of expansion vessel which had lasted 15 years but finally suffered a bladder failure. The swap was straight forward and the fixing bracket on this was identical to the in-place fixing bracket so no significant fiddling about was required to mount the new expansion vessel. It was pre-charged to 1.5bar, which was confirmed during fitting. Painless job to fit, and hopefully good for another decade and a half.

### ⭐⭐⭐⭐ Good price for all the parts that you get.
*by S***L on 8 November 2025*

Liked most things about this kit, good quality tank and accessories mostly look well made. Docked it one star for the poor fixing kit. The bracket chewed into the red paint coating and chipped it. The screws are nearly impossible to access when the bracket is attached to the wall. The screws also chipped the red coating. Ended up putting a steel band around that is screwed to the wall to hold it all in place. Ignoring the fixing, this is still a good product and I'd still recommend at this price.

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**Shop now:** [https://www.desertcart.fi/products/263872325-12-litre-heating-expansion-vessel-and-sealed-system-kit-z1](https://www.desertcart.fi/products/263872325-12-litre-heating-expansion-vessel-and-sealed-system-kit-z1)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-23*