What kind of valves do you have for dumping yeast? I use butterfly valves and I haven't had an infection in the two years I have been using plastic Conicals. I also do a 180 degree water rinse and then star san soak before I fill.
I know someone that contract brews at Knee Deep and that is what he told me they have in their brew kettle. I have never heard of it either before he told me. But it makes sense tasting some lighter beers with a little caramel flavor.