SESI Scale Inhibitor

Replacement electrolytic scale inhibitor for whole-house systems – model SESI 15 (EAN 5011282050015) by Sentinel. Designed for 15 mm domestic pipework; installed on the rising main to reduce limescale build-up in boilers, heat exchangers, washing machines and other appliances. Environmentally friendly and maintenance-free: no batteries, no magnets, no chemicals required. WRAS approved for peace of mind and increased system longevity: helps maintain efficiency and reduce scale-related energy losses and appliance damage. Compact size for easy installation: approx. 195 mm length, suitable for standard 15 mm copper or plastic pipework. Ideal for use in homes with hard or moderately hard water; supports extended life of heat exchangers, boilers and hot water systems.