Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't buy this valve

I installed this valve in my radiator. Upon putting the coolant in I had a small drip out of the valve.I tightened the valve by hand. The handle came loose under hand pressure. Now I could not open the valve to drain the radiator, or close it to stop the drip. I had to remove the drain cock at the wrench nut because it was now worthless. Very poor design.