Hi Randy-I had a similar situation to yours, with respect to distance and height, pumping water from a pond to a garden for irrigation.
That's why I asked the size you used, to get a better handle on your situation. You could use the old 1" line. However, I would tend to go 2" if that's what your pump is.
As a fairly inexpensive and easy to install compromise, you could try using the 1 1/2" black pipe that can be obtained at HD or Lowe's in 50 or 100' rolls. My 2" pump, the cheapest one I could get at TS, seemed to tolerate this increased resistance without any ill effect, and the amount of water moved is impressive. Pump has not been babied and still going strong after 3 years, I don't run it all the time, but many many hours each season.
Oh, and Scott, that's a GREAT idea on the gas tank! I've been trying to think of something to allow the pump to run for a long time.
