Hi, This is my first go at raising feeder pigs. I have 2 that i bought from my uncle. They are three months old now. He said my watering system wont last long. I have a 15 gallon water drum cut in half with a metal auto top off. What are some options on water source. heres a video of my setup. Ive read something about metal nipple, but wont they brake the pvc connecting it?