by Steve_Cox » Fri Sep 25, 2009 10:46 pm
Typically with the tank on it's side the the 1" and a 3/8" are on top of the end and two 3/8" on the bottom of the same end. 1" is the fill, the 3/8" above the waterline is the vent, and the two bottom 3/8" are the feed lines to be pumped from. Tanks like this are not usually used as pressure vessels. If you want to go pressure how about a well expansion tank, that way you won't need a pump because it has a bladder that stretches when you connect a hose and fill the tank.
Steve