I was brewing last night and near the end of the boil I noticed that my Therminator outlet hose had gotten too close to the burner and had melted. I scrambled around to find a replacement hose and parts, meanwhile I turned down the kettle heat to just boiling, and pulled the hops out at what should have been flameout. After getting the hose replaced, it still took 15 minutes to circulate the boiling wort through the Therminator and hoses to sterilize.
Long story short - my boil went for 20 minutes too long, and I really wanted to try to get my full 5 gallons. So while I normally leave the wort in the Therminator and lines after chilling/pumping to the fermentor (which results in a 1/2 gallon loss, and a 7% efficiency loss), I decided to blow the line clear into the fermentor with compressed air to obtain the remaining 1/2 gallon.
I'm not worried about the batch, I'm just wondering how bad of a practice this is. Thoughts?