Additives after boiler replacement.

[sammathias]

X800 is the boy. But wouldnt leave it in longer than a few days. Apparently will eat through your rads.

 

[townfanjon]

How long can Sentinel X800 Fast Acting Cleaner be left in the system? | Sentinel

Thanks for that pal, looks like I have heard a load of bull lol

 

[UKenGB]

And some more, straight from the horse's (i.e. Sentinel's) mouth:-

"both will do a good job, the key difference is the time scale. X800 will have removed as much as it can in 24hrs, X400 being a ‘gentle’ cleaner can be left in for 3 weeks before draining. Both will benefit from temperature so run your system as normal."

So in fact I think I will use X800 for a couple of days then flush and refill with some X100. Although this is not time critical, I guess it would be better overall to have it all finished in a couple of days and then it's all done and any mess can be cleared up and tools put away etc.

 

[Bogart]

Always used Fernox F3 I bung it in and leave it some time, have left it in for weeks. Usually buy it cheap on *bay.