Introduction

Central heating inhibitor is essential for keeping your system clean, efficient, and long-lasting—but many homeowners don’t fully understand why.

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What Is Inhibitor?

A chemical solution added to heating systems to prevent:

• Rust (corrosion)
• Limescale buildup
• Sludge formation

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How It Works

It creates a protective layer inside pipes and radiators, stopping metal from reacting with water and oxygen.

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Benefits

• Extends boiler lifespan
• Improves heating efficiency
• Reduces energy bills
• Prevents costly repairs

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What Happens Without It?

Without inhibitor, systems develop:

• Black sludge
• Cold radiators
• Noisy boilers

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How Often Should You Add It?

• Once per year
• After draining the system
• After installing new radiators

Best Radiator dosing tool funnel

Signs your radiator needs cleaning