---
product_id: 213732817
title: "CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor"
brand: "coswarm"
price: "€ 104.12"
currency: EUR
in_stock: true
reviews_count: 6
category: "Cos Warm"
url: https://www.desertcart.gr/products/213732817-cw3-central-heating-system-cleaner-treats-up-to18-radiators-boiler
store_origin: GR
region: Greece
---

# Biodegradable & eco-friendly Treats up to 18 radiators Super concentrated formula CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor

**Brand:** coswarm
**Price:** € 104.12
**Availability:** ✅ In Stock

## Summary

> 🔥 Clean smarter, heat better — don’t let sludge steal your comfort!

## Quick Answers

- **What is this?** CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor by coswarm
- **How much does it cost?** € 104.12 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/213732817-cw3-central-heating-system-cleaner-treats-up-to18-radiators-boiler)

## Best For

- coswarm enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Smart & Safe:** Biodegradable, non-acidic solution that’s gentle on your system and the planet.
- • **Hassle-Free Maintenance:** Clean your system without shutdowns—just pour, run, and save on costly repairs.
- • **Universal Compatibility:** Works seamlessly with all boiler types, metals, and pipework—new or old.
- • **Ultra-Concentrated Formula:** One 500ml bottle treats a full 150-liter system—no refills needed.
- • **Powerful Scale & Sludge Removal:** Restore peak heating efficiency and silence noisy boilers fast.

## Overview

CosWarm CW3 Central Heating System Cleaner is a highly concentrated, biodegradable solution designed to clean and descale boilers, radiators, and pipe systems. Treating up to 18 radiators per 500ml bottle, it effectively removes rust, sludge, and debris to restore heating efficiency, reduce noise, and extend system lifespan—all without requiring system shutdowns.

## Description

Deep-Clean The Boilers & Regain Heating Efficiency With CosWarm CW3 Central Heating System CleanerIf everything seems to be working properly, routine maintenance and boiler cleaning may not always be on the top of the mind. However, if you choose to put off the cleaning for long, it can lead to fuel and efficiency losses. Scale and sludge buildup causes the boilers to run harder to maintain the same performance. So it’s better to be proactive when it comes to boiler maintenance and cleaning.Give your boilers a thorough cleansing with CosWarm CW3 Central Heating System Cleaner. It efficiently removes sludge, scale and debris (collected over time) in your radiators and maximizes the amount of heat generated. This boosts the efficiency of the boilers so you can reduce the amount you pay for the heating bills and also benefit the environment.How Does CW3 Central Heating System Cleaner Help?Effectively removes sludge, scale and debrisAccelerates the cleaning processRestores heating performance and efficiencyMinimizes boiler noiseMaintains boiler efficiencySaves time and money by not closing the system and repairing the boilersKey Features:Efficient: High performance and fast-acting formulaHighly Concentrated Formula: Treats up to 18 single radiators (150-liter system)Biodegradable: Suitable to use around people and environmentVersatile: Compatible with all boilers, radiators and pipework systems as well as existing and new heating systemsCompatible: Can be used for all types of metals commonly used in the heating systemsConvenient: Does not interfere with the operation of the system so no need for complete boiler shutdownsWant a quick-fix solution for central heating system cleaning? Click on the “Add To Cart” button now and watch how efficiently CosWarm CW4 cleans the boiler.

Review: It worked for me. - It worked right away. I used it in my boiler to stop that knocking sound in the pipes.
Review: This product is amazing, we had no hot water in shower, although CH was fine, thought it was due to sticking switching valve. Put this CW3 in the system via towel rail and eezyfill dosing tool, took about 10 mins. Next morning shower hot and heating system quieter. Drained system after 4 days and then added CW1 and CW2. The boiler heating system and hot water are now perfect and so quite. Would highly recommend these products, saved me £300 in call out and replacement valve costs.

## Features

- EFFECTIVE CLEANSING OF CENTRAL HEATING SYSTEM: Regular cleaning of heating systems can stop it from damage. Use CosWarm CW3 boiler cleaner to effectively eliminate scale, sludge and debris and retain the heating efficiency of your heating systems.
- SUITABLE FOR EXISTING & NEW HEATING SYSTEMS: CosWarm CW3 central heating system cleaner can be used for all types of boiler, radiators and pipework systems. Radiator cleaner is compatible with all metals and materials commonly used in central heating systems.
- BIODEGRADABLE: Our non-acidic central heating boiler and radiator descaler is a safer alternative compared to other formulas. It is suitable to use around people, the environment and your heating systems.
- SUPER CONCENTRATED FORMULA: Our highly concentrated formula requires no secondary containment for it to work. 500 ml of CosWarm CW3 central heating system cleaner can be used for up to 18 single radiators (150-liter system).
- EASY TO USE: Our central heating cleaner makes boiler cleaning a breeze. The system can be left running normally while you are using our boiler cleaner. And it’s easy to use; just pour the chemical in the system according to instructions and let it work. Use W1 inhibitor after this.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B089H26TJ3 |
| Best Sellers Rank | #541,398 in Health & Household ( See Top 100 in Health & Household ) #5,767 in All-Purpose Household Cleaners |
| Customer Reviews | 4.2 4.2 out of 5 stars (165) |
| Date First Available  | September 28, 2020 |
| Material Feature  | Biodegradable Warning |
| Package Dimensions  | 7.2 x 3.34 x 2.4 inches; 1.06 Pounds |

## Product Details

- **Brand:** CosWarm
- **Item Form:** Liquid
- **Item Volume:** 500 Milliliters
- **Material Feature:** Biodegradable
- **Unit Count:** 21.1644 Ounce

## Images

![CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor - Image 1](https://m.media-amazon.com/images/I/81oeolIkOML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It worked for me.
*by I***R on February 6, 2025*

It worked right away. I used it in my boiler to stop that knocking sound in the pipes.

### ⭐⭐⭐⭐⭐ Review
*by R***R on November 1, 2022*

This product is amazing, we had no hot water in shower, although CH was fine, thought it was due to sticking switching valve. Put this CW3 in the system via towel rail and eezyfill dosing tool, took about 10 mins. Next morning shower hot and heating system quieter. Drained system after 4 days and then added CW1 and CW2. The boiler heating system and hot water are now perfect and so quite. Would highly recommend these products, saved me £300 in call out and replacement valve costs.

### ⭐⭐⭐ Review
*by P***O on November 24, 2024*

Di facile uso fa il suo lavoro

## Frequently Bought Together

- CosWarm CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor
- CosWarm CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating
- Just Dose It Central Heating Dosing Tool, Radiator Dosing Funnel - For Adding Chemicals Like Fernox Central Heating Inhibitor, Sludge Remover, Leak Sealer & Sentinel X100

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-23*