Where is the plug to drain coolant on my 2006 Ford Focus?

I'm quite sure k-seal has caused a blockage in my cooling system somewhere, as since using it the coolant level has been erratic, bottle empty one day, then higher the next e.t.c.

I want to flush old water out ( only use water) but where will I find the drain plug?

During flushing coolant, is it just the plug I remove or do I also have to disconnect radiator hoses too?

Check bottom of radiator and open cap.

The radiator drain plug will only drain the radiator, which is usually less than a gallon. Most shops just remove the lower radiator hose to drain. Much faster and it drains a portion of the engine block

Its a petcock. Just look for petcocks on block and bottom of radiator.

My guess is that your head gasket is going.

'Stpaulguy' has the best idea - just pull the lower radiator hose.