"Bought this a few years ago before SF stocked them. Fitted it myself which was pretty easy. Combined this will a clean and protection from Sentinel and the CH water continues to be clean (you can see it through the plastic casing). Service it once a year. Impossible to say if it extends the life of the boiler but I can believe it (along with proper servicing). Also allows easy dosing of chemical cleans. If you're getting a new boiler I would strongly suggest you make the additional investment in one of these for piece of mind."
"Best unit for helping to keep a central heating system clean in conjunction with an inhibitor and after a system has been power-flushed to remove excess debris, or fitted in a system from new. You can take this unit apart and know it has been cleaned correctly. I bought it to fit into my own house."