How to fill CH with anti-corrosion fluid ?

[biggiebig]

I need to change the position of a radiator in our living room so will need to drain our CH system.


We have a cylinder gravity fed system but our CH is a sealed system you fill it directly via the mains using a stopcock and you check the pressure using the pressure gauge above the boiler. Hence I don’t think there is a separate feed tank in the loft.

If I drain the system, how do I refill it with anti-corrosion fluid?

 

[JPC]

isolate a rad at the valves (before you fill up) undo a nut at the top of the rad (the bleed one or the other, which ever looks easier) with a compression elbow take the nut off and screw the elbow into the rad and then use a funnel