--- product_id: 202294475 title: "CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating" brand: "coswarm" price: "1057.93 DT" currency: TND in_stock: true reviews_count: 13 url: https://www.desertcart.tn/products/202294475-cw1-central-heating-system-inhibitor-and-protector-treats-upto-18 store_origin: TN region: Tunisia --- # Non-toxic & biodegradable formula Treats up to 18 radiators Prevents rust, limescale & corrosion CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating **Brand:** coswarm **Price:** 1057.93 DT **Availability:** ✅ In Stock ## Summary > 🛠️ Protect your heat, power your comfort – never settle for less! ## Quick Answers - **What is this?** CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating by coswarm - **How much does it cost?** 1057.93 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/202294475-cw1-central-heating-system-inhibitor-and-protector-treats-upto-18) ## 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-Friendly Power:** Non-toxic, biodegradable formula that’s kind to your home and planet. - • **NSF Certified Safety:** Trusted quality assurance from a leading independent testing authority. - • **All-Metal Compatibility:** Safe for all heating systems including aluminium – no compromises. - • **Ultimate Boiler Longevity:** Extend your boiler’s life with advanced corrosion and sludge protection. - • **Super Concentrated Efficiency:** 500ml treats up to 18 radiators – less product, more protection. ## Overview CosWarm CW1 Central Heating System Inhibitor is a super concentrated, NSF certified treatment fluid designed to protect boilers, radiators, and underfloor heating systems from rust, limescale, sludge, and corrosion. Treating up to 18 radiators per 500ml, it’s compatible with all metals including aluminium, non-toxic, biodegradable, and engineered to extend the lifespan and efficiency of your heating system. ## Description Shop CosWarm CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating. Free delivery on eligible orders of £20 or more. Review: Good stuff. - Does the job. Review: Excellent - Excellent 👍 ## Features - Contains benzisothiazolone. May produce an allergic reaction. - Safety data sheet available on request. - EXTEND THE LIFE OF YOUR BOILERS with CosWarm CW1 boiler corrosion inhibitor and rust prevention liquid. This revolutionary formula protects your system from scale formation, corrosion buildup and provides continuous protection. It stops frequent venting of radiators and ensures long-lasting and smooth working of boilers. - SUITABLE FOR EXISTING & NEW HEATER SYSTEMS: CosWarm CW1 steam boiler inhibitor for central heating can be used for all types of boiler, radiators and pipework systems. Our boiler limescale and rust preventer is compatible with all metals and materials (including aluminium) commonly used in central heating systems. - NON-TOXIC & BIODEGRADABLE: With CosWarm CW1 central heating inhibitors, power meets green. The biodegradable formula is safe for your boilers as well as the Earth. Our boiler rust and corrosion inhibitor is non-toxic and is safer to use around pipes, people and the environment than other toxic and acidic boiler inhibitors. - SUPER CONCENTRATED FORMULA: Our highly concentrated radiator inhibitor fluid treats much more and requires no secondary containment for it to work. 500 ml of CosWarm CW1 heating system inhibitor can treat up to 18 single radiators (150-litre system). - NSF CERTIFIED FOR SAFETY: Millions of customers take it as a mark of quality assurance because every aspect of a product’s development is thoroughly evaluated by one of today’s most respected independent product testing organisations. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B086DV7PD5 | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 392,746 in DIY & Tools ( See Top 100 in DIY & Tools ) 3,410 in Central Heating System Accessories | | Customer Reviews | 4.3 4.3 out of 5 stars (340) | | Date First Available | 26 Mar. 2020 | | Item Weight | 500 g | | Manufacturer | CosWarm | | Manufacturer reference | CW1-AU | | Part Number | CW1-AU | | Product Dimensions | 18.3 x 8.7 x 5.8 cm; 500 g | ## Images ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 1](https://m.media-amazon.com/images/I/61XPeGavngL.jpg) ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 2](https://m.media-amazon.com/images/I/61wcUQS48ZL.jpg) ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 3](https://m.media-amazon.com/images/I/616up97tsIL.jpg) ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 4](https://m.media-amazon.com/images/I/41XVxUPbZmL.jpg) ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 5](https://m.media-amazon.com/images/I/51XzsG6KYSL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good stuff. *by A***K on 12 May 2025* Does the job. ### ⭐⭐⭐⭐⭐ Excellent *by B***H on 5 December 2024* Excellent 👍 ### ⭐⭐⭐⭐ Easy to use and good value *by B***K on 5 April 2021* Product arrived on time and appears better value than many competitors. 500 ml treats up to 18 radiators, most competitors sell 1L bottles that only treat 10. Assuming it does what it says on the bottle, it’s excellent value. Very easy to add to the heating system. ## Frequently Bought Together - CosWarm CW1 Central Heating Inhibitor & Protector | Treats Up to 18 Radiators | Boiler Water Chemicals | Prevents Rust, Corrosion & Scale in Boilers, Hot Water Systems & Hydronic Heating Systems - 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 CW2 Central Heating System Silencer – Boiler & Radiator Noise Reducer Absorber & Dosing Liquid for Closed Loop System, Hydronic System – Reduces Boiler Noise - For 18 Single Radiators --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/202294475-cw1-central-heating-system-inhibitor-and-protector-treats-upto-18](https://www.desertcart.tn/products/202294475-cw1-central-heating-system-inhibitor-and-protector-treats-upto-18) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-01*