(ET) Water tank attachment for an Elec-trak.

[Christopher Zach <cz alembic crystel com>]

Ok, I need something else here; I want to build a water tank for my 
Elec-trak. Something that can carry a good 10-15 gallons of water from 
my rain barrels out to the garden, or to wash off the solar panels on 
the shed.

The problem is, how?

What I have is a 16 gallon fuel tank from a Porsche 914, a welder, and a 
bit of time. I could probably build a rail mount for the tank and put it 
on the back of an Elec-trak, but the problem is filling and emptying it.

I'd want a pump that can provide around 40-50 pounds of pressure, and be 
able to run backwards so I can fill the tank by hooking the hose to the 
rain barrel. And of course run on 36 volts DC.

Any thoughts before I just begin welding?

C