Who knew? Despite our best efforts at insulating wet bays, skirting the Duck, hanging trouble lights and wrapping pipes with heat tape and foam noodles, yesterday morning we woke up to no water. All of our preparations were no match for the -10F temps. Well played, temps, well played.
Luckily, after cranking the back furnace up so that it ran for something like 2 hours straight, we had water again, and it seems that there was no damage done. Whew!