So, I really need to flush my radiator but can not open the drain. I expected to turn the valve a quarter turn and it would open like any valve. No such luck. It just turns infinitely in either direction and does not open. It was never a forced turn, it turned fairly easy. The "****" peice that I am turning seems to be kinda like pvc material. This is my first attempt at this, haven't owned it terribly long. Any input is appreciated.