I have a water box to collect spring water and pump it out with a horizontal submersible pump. I feed the pump output thru the side of the box to protect it from freezing and accidents. I'm the quick & dirty type, when the water fails the wife wants water back NOW!, so what I have been using is a short 1" pipe with very long threads so I can sandwich the wall with 2 flanges face to face with threads sticking out both ends for connections. This has worked pretty good, although one threaded end has straight threads instead of tapered.
I'm getting ready to replace the tank and have time to do it better this time. What is the best way to feed a water pipe thru a tank wall?