Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000)

Well known make ,have used it before ,think previously it came with an adapter for topping up through the radiator which you now have to pay extra for . It seems to prevent the radiators from rusting through but only time will tell

Good product used many times

Product was leaking badly when opened.

Central heating system less noisy, radiators hotter and I am confident my boiler is mire efficient

Used this to clean out my heating system once I had flushed the radiotors cold water tank. Had my plumber around to replace the old 21 year old boiler with a new combi boiler, he said the sytem was the cleanest he had seen. I live is a high limescale area

Excelent product, easy to apply shut off towel rail remove top nut, syphen out water add product and watter to top back up put nut back open shutoff run heating simple and very effective

I had a crazy situation after my boiler was replaced, at which time the system was dosed with this inhibitor. After a period when things were fine, the system started to gain pressure and the radiators needed vented twice a week to keep the pressure down. Internet research suggested this could be hydrogen gas, formed by the corrosion process in the radiatiors. To satisfy my curiousity I found I was able to ignite the venting gas, confirming the presence of hydrogen and therefore corrosion!After inaction from the installer, I purchased my own Sentinel X100 to add added to the system. It took a couple of weeks to get results but the gasing has stopped. Sadly around about the same time the seal at many of the radiator connections including the blanking plugs and vent plugs has softened and slight leaks have appeared, pressure dropping etc. I wondered if this is a consequence of my actions or just bad luck. Any ideas?

x100 very good