Inline Scale Inhibitor 15/22mm fittings

  • Electrolytic scale inhibitor
  • Service life – up to 10 years
  • Saves energy costs
  • No chemicals or power needed
  • Easily installed


SKU: ILSI Category:


Part L of the Building Regulations (conservation of fuel and energy for dwellings) states that where the mains total water hardness exceeds 200ppm, provision should be made to treat feed water to water heaters and hot water circuits of combination boilers to reduce the rate of accumulation of timescale and to limit its harmful effect on energy efficiency.

Electrolytic scale inhibitors are listed in the Domestic Building Services Compliance Guide as a suitable control. As water flows through the unit it emits charged zinc ions which induce hardness salts to cluster together and pass through heating appliances rather than forming Iimescale deposits on the heat exchanger or water heating element. Service life is dependent upon local water conditions and water usage. When the beneficial effect subsides its time to replace the unit.

This product is WRAS approved. WRAS approval demonstrates it is of a suitable quality and standard against the Water Supply (Water Fittings) Regulations and Water Supply (Water Fittings) (Scotland) Byelaws, provided it is installed and used in accordance with the installation and requirement notes and any other restrictions within the approval. Any water fitting, which when installed, will carry or receive water from the public mains water supply in the UK, must comply with these regulations. They require that a water fitting should not cause waste, misuse, undue consumption or contamination of the water supply and must be ‘of an appropriate quality and standard’. To learn more about compliance, visit:

· One year replacement guarantee
· WRAS Approved Product
· Maximum working pressure:   10 bar at 20°C
· Made in Great Britain
· Service life – up to 10 years
· Saves energy costs
· No chemicals or power needed
· Easily installed
· No moving parts
· No maintenance required
· Compression fittings (15mm or 22mm)
· 15mm Dimensions:   170mm x 26mm diameter
· 22mm Dimensions:   170mm x 33mm diameter

CODE: ILS1 (15mm Compression Fittings)
CODE ILS122 (22mm Compression fittings)

Additional information

Weight .254 kg
Dimensions 170 × 26 × 26 mm

ILS1 Secification Sheet