pianotuna, yes, that is then kind of connector we use here in the States to fill waterbeds using a bathroom sink. It screws on instead of the aerator and has normal male garden hose threads.
Bob, The winterization kit adds a tee to the suction side of the pump with either a 3 way diverter valve or adds a shutoff valve to the original suction line and to the winterization hose.
Our winterization hose is clear vinyl hose, presumably to see antifreeze flowing. You may want something more substantial, like a piece of pex.
If adding a wye pipe inside, you may want to have a threaded end that will take a cap when not in use to avoid any inside spills when filling from the outside.
It amazes me that you guys are in this weather. And that your inside lines aren't perpetually frozen!
In our springhouse holding tank we use a 100 watt bulb in cold weather to keep the lines on the pump from freezing. Maybe a 40 or 60 watt could help in your sink area, if it is open?
For the shoreline compartment, check to see if you are getting cold entering from the 'mouse hole' entry. Could maybe block that with rags or something?
Another thing I've heard of people using for safe and controlled heating of small spaces (chicken incubators and brooders) is reptile heaters. Flat mats similar to what Don just added, but on a much smaller scale. They can help maintain tenths of degree in an incubator.
I enjoy reading about both of your cold weather adventures and the ingenuity used to keep things going!
