
SESI can help your customers SAVE up to £100* a year on their energy bills. Reduce limescale and save money with SESI.
*Effect of 1.6mm of scale (source British Water) on typical domestic fuel bill
Benefit from whole house protection against limescale with SESI.
Fitting SESI also helps to ensure that you're meeting the requirements of Part L - the importance of controlling the build-up of limescale.
- Whole house limescale protection
- Helps comply with Part L building regulations
- Easy to tighten at both ends
- Easy to install with compression fittings
- Fit, forget, maintenance free
- Simply fits in-line on the incoming water main
- Non magnetic, no chemicals, non polluting
- Full 5 year guarantee
SESI, limescale and Part L - Building Regulations
The latest Part L Compliance Guide acknowledges, for the first time, the importance of addressing problems associated with hard water which leads to limescale build up.
The minimum provisions for boiler efficiency, system circulation, hot water storage, system preparation and commissioning of gas-fired central heating in relation to hard water is as follows:
Where the mains total water hardness exceeds 200 parts per million, provision should be made to treat the feed water to water heaters and the hot water circuit of combination boilers to reduce the rate of accumulation of limescale.
The revised Part L Building Regulations Compliance Guide 2010

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Benefits & Cost Savings with SESI.
- Improves performance and longer life for the water system by protecting the heating element from scaling up, leading to lower fuel bills.
- Improves water flow by protecting the pipes from scaling up, which maximises the effectiveness of appliances.
- Minimises the need for maintenance requirements throughout the life of the system.