
Chemical water treatment should play an integral part in system protection to help ensure long-term efficiency and trouble-free operation. This is because as soon as water is introduced into a central heating system there is a risk of general corrosion and over time, all central heating systems are subject to the effects of sludge and limescale that form as a result of electrolytic corrosion, if it has not been correctly treated and maintained to an appropriate standard.
Boiler and central heating system efficiency can be maintained long-term simply by ensuring it is cleaned, maintained and protected by the use of effective water treatment.

Calmag are the largest independent manufacturer of water conditioning products in Europe.
We are succeeding in achieving a simple logistical approach to our industry which has been welcomed by the plumbers merchant, installer, specifier and end user.


Fernox is the UK’s market leading brand of domestic and commercial water treatment products.
With over 40 years experience in chemical water treatment, Fernox has maintained market leadership through continual investment in Research and Development against the damaging effects of corrosion and limescale.


Here at Sentinel, we’re justly proud that the name Sentinel is recognised by pretty much everybody that works in the heating industry, here in the UK and now across Europe. Even more so, that the name is recognised and readily associated with the key drivers of our business – the provision of quality water treatment products, innovation in terms of those products and the way we work with our partners, and a commitment to constant improvement.
