Hi Please can you advise, i need to replace a couple of radiators on my system this weekend, so obviously i need to drop the water from the system.
My question is this, what do i need to do to the boiler once i have readded the water to the correct pressure (just over 1 bar) and removed all air in radiators.

Do I need to remove air from the boiler and if so how?

Thanks in advance.

Andrew, September 2008

No, just as you stated, blead the rads and fire it up, keep on checking the rads for air. But if you're not cutting into the pipework and its just a straight rad swap, all you will need to do is turn off both rad valve(2 per rad) drain the water from the rad, crack the blead nipple to help the water come out, swap the rads, open the valve and top up the pressure, you dont need to drain the system or drop the pressure. Hope this helps

LTGF, September 2008