hepkat701
Well-Known Member
Im in the process of putting together my first all grain system, a HERMS system to make 10 gallon all grain batches. Stainless for the brewtus is ordered and being cut for me by a custom fabricator now. I hope to be welding it in the next few weeks. I am using three 15 gallon keggels for hlt, mlt and bk. Instead of placing the heat exchange coil inside the hlt I want to use a 5 gallon sankey keg that I have and use an electric heating element to heat the exchange water. The rest of the system will be natural gas. I want the 5 gallon exchanger because i will be able to more quickly adjust the exchange water in a smaller vessel, and to make clean up easier. My question is what size coil should I use so as not to create too much back pressure on the pump, I need to have a small enough diameter that it can be coiled inside a 5 gallon keg but large enough not to restrict the flow. Any ideas?