The compressor is in a wooden dog house like structure along with a small well pump. The heat generated by the compressor keeps the house warm. I buried the line in a sleeve of poly pipe insulation from the house to the pond to protect it and hoped it would keep the line from freezing. I really should put an air release valve and gauge on the line also.
We are having a rain day today, a break from the below freezing we've had for the last couple of weeks. I'm sure it has to be somewhere in a high spot locked in the surface ice, like Rainman suggested. I should have weighted the length of the line to where it enters the pond. Wouldn�t the pressure of the air push the alcohol to the blockage?
I�m thinking, about putting on an inline antifreeze device, but the ones I�ve seen are pretty bulky and wouldn�t fit in the well house. I�m a DIY guy and I�m trying to figure out how to set up a flow valve using back pressure, in a small package. I don�t think I�d need more than a quart of alcohol in the reservoir for the winter.
