Our house elevated on bedrock showing the path of glycol and water from water tank room to the lake pump
The lines from the glycol tank run in a simple closed “loop” system. There's an enclosed rubber hose (about 500 feet worth) running along each side of the waterline. Hot glycol circulates inside the hose, alongside the water line to keep it from freezing.
To start the process we have to first turn the glycol heater from “Vacation” mode to “Hot”. We then allow that to heat up for 30 to 45 minutes, depending on the temperature.
After the glycol gets to a nice temperature, I turn on the electric glycol pump (see below). This actually “pulls” the glycol from the 5-gallon holding tank above it. It then forces the glycol into the loop down to the lake and back.
This is the pump that sends the (really cold) lake water up to the house. To do this we head to the breaker panel in the house and hit the double breaker that activates our Franklin Electric ½ hp submersible lake pump.