Sentinel Solutions Electrolytic Scale Inhibitor 15mm Compression SESI15

The Sentinel SESI15 is an electrolytic scale inhibitor from Sentinel Solutions, designed for whole-house water treatment. It works inline, using an electrolytic process to break down hardness salts in hard water. This causes the salts to coagulate and prevents limescale from adhering to pipework and appliances. The result is reduced scale build-up, improved system efficiency, and potentially lower fuel bills. The unit does not add chemicals to drinking water, and its compact design makes it suitable for installation in restricted spaces. As water passes through the unit, an electrolytic reaction causes dissolved calcium and magnesium salts to form microscopic crystals that remain suspended rather than depositing on surfaces.

• Increased limescale deposits on taps, showerheads, and heating elements
• Reduced water flow or pressure in hot water systems
• Higher fuel bills due to scale build-up in the boiler or cylinder
• Visible scale accumulation in pipework or appliances
• Scale-related failures in washing machines or dishwashers

• Confirm your appliance model and connection size match the 15mm compression fitting.
• Check that the part number SESI15 is correct for your system.
• Ensure the 15mm compression connection is compatible with your pipework.