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$132.03
Home/DIY & Tools/Building Supplies/Heating & Cooling/Central Heating Systems & Accessories/Accessories
CosWarm CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating
★★★★★
$132.03
Quantity
1
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About this item
- 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.
Product details
Customer reviews
What customers say about Bigamart
10 Trustpilot reviews total, with 2 shown at a time.
Trustpilot
★★★★★
Excellent
4.5 average rating
S
Sigalit
🇮🇱 · January 2026
★★★★★
I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.
V
Verified buyer
🇦🇺 · November 2025
★★★★★
The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.
Showing 1–2 of 10 reviews
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