this is not paul dunning that went to applemore college is it and lives in southampton????????????????.. easiest way is to partially drain down and whip off a rad valve and just poo it into the pipe!
gas man chris (wiseman), May 2007
Either drain a radiator and remove the 1/2" bsp plug/vent and pour it in there .
or if the vents on your rads are not 1/2" bsp you can get inhibitors that come in a mastic type tube and can be squirted in using a standard mastic gun or you can buy a pressure pump (like a garden spray pump) and send it into a drain tap as I usually do
