Howdy. I'm plumbing in a new shower/tub unit and am unsure what to use to connect the tub spigot(spout or faucet) to the mixing valve. The mixing valve is brass and was told by a local building supply to use galvanized pipe between it and the spout. I've read a lot lately about problems with different metals connected together. I was going to use brass but this place didn't have any and neither did Home Depot. Does anyone have any input on this? Thanks in advance. Roshe