---
product_id: 214597225
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: "€ 114.49"
currency: EUR
in_stock: false
reviews_count: 13
url: https://www.desertcart.pt/products/214597225-cw3-central-heating-system-cleaner-treats-up-to18-radiators-boiler
store_origin: PT
region: Portugal
---

# Non-toxic & non-acidic safe formula Treats up to 18 radiators Super concentrated 500ml 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:** € 114.49
**Availability:** ❌ Out of 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?** € 114.49 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/214597225-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

- • **Concentrated Efficiency:** One 500ml bottle treats up to 18 radiators—max performance with minimal effort.
- • **Hassle-Free Maintenance:** Simply pour in and run your system normally—no downtime, no mess, just warmth.
- • **Universal Compatibility:** Safe for all boiler, radiator & pipe materials—perfect for new & existing systems.
- • **Eco-Safe & User-Friendly:** Non-toxic, non-acidic formula ensures safety for your home, family, and environment.
- • **Powerful System Revitalizer:** Effectively removes rust, sludge, scale & debris to restore heating efficiency.

## Overview

CosWarm CW3 Central Heating System Cleaner is a highly concentrated, non-toxic liquid solution designed to clean and descale boilers, radiators, and pipe systems. Treating up to 18 radiators per 500ml bottle, it safely removes rust, sludge, scale, and debris to boost heating efficiency and prolong system life. Compatible with all common metals and materials, it’s easy to use without interrupting your heating system’s operation, making it the essential maintenance upgrade for any modern home.

## Description

CosWarm CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor : desertcart.co.uk: DIY & Tools

Review: Brilliant CH cleaning fluid - 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: Useful stuff - Make sure you use this regularly, on a new system. Id say once a year, like having the chimney sweep in & top up with the same brand inhibitor. We fitted a screw type magnetic filter & have had no problems since.

## Features

- Safety data sheet available on request.
- EFFECTIVE CLEANSING OF CENTRAL HEATING SYSTEM: Regular cleaning of heating systems can prevent it from damage. Use CosWarm CW3 boiler cleaner to effectively remove 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.
- NON-TOXIC & NON ACIDIC: Our non-toxic and non-acidic boiler and radiator descaler is a safer alternative compared to other toxic, chemical formulas. It is safe 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 treat up to 18 single radiators (150-litre 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. Treat with CW1 inhibitor after use.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B089H26TJ3 |
| ASIN  | B089H26TJ3 |
| Best Sellers Rank | 272,398 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,606 in Central Heating System Accessories |
| Brand | CosWarm |
| Customer Reviews | 4.2 4.2 out of 5 stars (171) |
| Customer reviews | 4.2 4.2 out of 5 stars (171) |
| Date First Available | 31 May 2020 |
| Format | Liquid |
| Manufacturer  | CosWarm |
| Manufacturer reference  | CosWarmCW3 |
| Package Dimensions  | 18.29 x 8.48 x 6.1 cm; 481.94 g |
| Units | 500.0 millilitre |

## Product Details

- **Brand:** CosWarm
- **Item form:** Liquid
- **Item volume:** 500 Millilitres
- **Material feature:** Biodegradable
- **Number of items:** 1
- **Scent:** Unscented
- **Special feature:** Concentrated, Descaler, Non Toxic
- **Specific uses for product:** Gun
- **Surface recommendation:** Metal
- **Unit count:** 500.0 millilitre

## 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/71tScHxMQDL.jpg)
![CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor - Image 2](https://m.media-amazon.com/images/I/816Evij5bpL.jpg)
![CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor - Image 3](https://m.media-amazon.com/images/I/817ZmeHqrwL.jpg)
![CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor - Image 4](https://m.media-amazon.com/images/I/81F3mT0NO2L.jpg)
![CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor - Image 5](https://m.media-amazon.com/images/I/81Y3J85NtYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Brilliant CH cleaning fluid
*by R***R on 1 November 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.

### ⭐⭐⭐⭐⭐ Useful stuff
*by G***A on 1 September 2024*

Make sure you use this regularly, on a new system. Id say once a year, like having the chimney sweep in & top up with the same brand inhibitor. We fitted a screw type magnetic filter & have had no problems since.

### ⭐⭐⭐⭐⭐ Cost effective, fast delivery
*by J***Y on 19 December 2024*

It was delivered quickly after the order. Packaging was adequate not excessive and the product seems cost effective.

## 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 Portugal*
*Store origin: PT*
*Last updated: 2026-02-05*