This season, I am going to prepare my cabin for those times when the outside
water system is frozen, about October to April.  I shall use two reserve
tanks of 55 gallon plastic, a small electric water heater, and 12v. RV water
pump, or two.  (I haven't decided if I can use one pump for both the hot and
cold water, or need one for each side.)

My question is:  What size and type of 110v. AC to 12v. DC converter would I
need?  Would that depend on the amperage ratings of the pumps?  Do I need to
get anything special, or can I just use the common transformer things that
come on printers, etc, as long as they are 12v. rated and have adequate
amperage?  Or should I bite the bullet, and buy a good model?  Or should I
even mess with the conversion and buy 110 v. pump(s)?

These will see only sporadic use during the winter season when we decide to
go up to the cabin.  The inside of the cabin reaches temps of 15 deg. F.
during the winter, and the systems, of course, would be drained upon leaving
each time.

And one last question:  Do all the pumps need to be mounted with the motors
horizontal, or could I mount them with the motor vertical, and the pumping
mechanism downward to assist bleeding?  Or is there a low point bleeder on
some/most models?

Advice and pointers from anyone who has done anything like this would be
appreciated.  I know this is going to be a Tinker Toy do it as you go
project, but I would like to start with the right major components.  I will
probably use FloJet pumps.  If I have the major components right, the piping
will be the easy part.

Steve.