UPGRADING CENTRAL HEATING

I have almost finished upgrading my c/ht system except new boiler
I have left some previous radiators and some plumbing in ,I am about to put in Sentinel x400 to remove any sludge etc,Old boiler still running ,will replace when system has been cleaned,
Do I need to put in central heating protector (fernox) at the same time as I have installed several new rads. to avoid any damage to them.

if you dont know the answer to that I would love to see what you have done on your install

LMAO

any way I am off as the missus has a sore tum and to save money I am removing her appendix

great aint i

wonder if there is a website www.surgeryNOT.com

You Guys ..use the same range of chemicals and get a Corgi bod to do the boiler...I`ll bet your work`s no worse than dozens I`ve seen and had to rectify