A few months back I bought some Blichmann Boilermakers from High Gravity brewing, I've used them several times, and I gotta say huge upgrade after quite a few years of using my old turkey fryer, a bucket and a Home Depot Cooler.
A week or two ago knowing that I was going to brew in the morning I pumped my HLT Boilermaker full of water the night before, in order to let my RO tank refill overnight. As I was setting up to brew that morning I was doing some final checks, and I looked in the HLT to discover that it was orange. There was rust in my kettle!
After draining my HLT I came to realise that the rust had originated from the little screw that holds the collar around the diptube in place. I fired off an email to High Gravity along with a picture of the diptube assembly. They replied back in less than an hour, reached out to Blichmann, figured out the problem and got it rectified in record time. (galvanized screw) I really just want to commend them for their excellent customer service.
Here's a picture of the poor diptube for the curious.