• Central heating inhibitor for long-term system protection: Sentinel X100 protects sealed, open-vented, and combi systems by preventing corrosion, limescale, sludge, and rust. It helps maintain consistent heating performance and extend the lifespan of boilers, radiators, and components.
• Dual-purpose radiator inhibitor and rust prevention formula: This powerful additive functions as both a radiator inhibitor fluid and rust treatment, reducing internal buildup and promoting smoother, more even heat output across your heating system.
• Ideal for use after system cleaning or flushing: LavaTap X100 is a smart follow-up to radiator flushing procedures. It helps preserve clean system conditions, prevents rapid recontamination, and stabilises pH neutral water chemistry.
• Safe, non-toxic formula with wide system compatibility: This central heating cleaner is suitable for mixed-metal systems and compatible with aluminium, copper, and steel. The fluid is non-toxic, pH neutral, and suitable for regular maintenance use.
• Accurate treatment for standard domestic systems: Each 1-litre bottle treats up to 100 litres of system water — ideal for homes with up to 10 radiators or equivalent underfloor heating zones. Easy to apply via filling loop or radiator.
• Supports energy efficiency and reduces gas waste: By protecting system performance and flow, LavaTap Sentinel X100 may help reduce boiler noise, cut energy waste, and support better fuel economy for lower ongoing heating costs.

LavaTap – Sentinel X100 Central Heating Inhibitor (1 Litre) is a high-performance additive that protects sealed, open-vented, and combi boiler systems from internal damage caused by corrosion, rust, limescale, and sludge. Designed to maintain system health and improve long-term reliability, this radiator inhibitor fluid helps reduce maintenance costs and enhance heating performance across the entire system. Each 1-litre bottle treats up to 100 litres of system water, which typically covers 10 radiators or a similarly sized underfloor heating setup. The product is safe for use with all standard system materials including aluminium, copper, and steel. Its non-toxic and pH neutral formulation is compatible with mixed-metal systems and contributes to cleaner, quieter operation by reducing boiler noise and water imbalance. By preventing sludge buildup and improving flow, LavaTap X100 supports more efficient heat transfer, which can help lower gas usage and reduce energy waste over time. Easy to dose via radiator or filling loop, it is trusted by both heating engineers and DIY users as part of regular system maintenance. Use this central heating inhibitor to extend the lifespan of your system and maintain cleaner, more balanced water throughout. For best practice, check inhibitor levels annually and re-dose every five years, in line with BS 7593 system maintenance standards.