I also bought a Zodi Hot-Tap water heater.  I plan to install a 12V sink submersible pump, and use
that 99% of the time.  The other 1%, I'll keept the 6V pump and batteries for canoe camping.  My
plans are the same as yours.

Sorry that this did not answer your quesiton. M

--- "Mike \"Rocket J Squirrel\" Elliott" <camping.elliott@GMAIL.COM> wrote:

> The Westy freshwater
> tank pump or any other small immersible bilge pump would do the job
> quite well. But all I can find are 12-volt models, and four D-cells put
> out 6 volts.

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