you could connect your pump to a hard pvc line that runs over all your tanks, with those threaded valved tapped into it. Or you could run a flexible line off your pump, and have it tee off and run to the various tanks, with a small ball valve (pretty cheap for airline tubing size) to control the flow to each tank. When purchasing the pump keep in mind the height it can lift water, and get something that can go at least a foot above all your tanks. I was at Home depot last night, and in the garden irrigation system area, there was a thing that connects to a hose that splits off to 12 small lines, with ball valves on all of them. Not sure how leak proof it is but it was around 10 bucks.