Sentinel X200 Boiler Descaler
does the job !!
I have used this many times, it is very good at reducing kettling noises in older boilers
3 Jan 2015
Worked a treat
My 20 +yr old boiler was kettling like mad - probably because recent system drain down and refill brought in loads of fresh hard water . Wasnt convinced that this would do any good but noticeable improvement after just 4 or 5 days. After about 2 weeks its now really quiet. Â£19 well spent.
17 Dec 2014
Used on my old system and it's back to full working order. I did use two litres to make sure, for Â£38 it was a cheap cure.
8 Nov 2014
Quality product used on its own with a power flush or added to the system with X100, brings a scaled/blocked boiler back to life ( unless the boiler is beyond repair), I personally wont use any other product.
17 May 2014