Ok so I am seeing alot of these things around and when talking to the client I am hearing that was a simple fix to a leaking loop. It is a 3' tall 6" pvc/ABS tube with a set of grundfoss pumps, it appears that the loop is tied into the loop. What and the world is this solving? It is just an easy way for the client to add water? I know it cant be just circulating into that 3' cylinder, it would over heat. What is the purpose of this? And how is this a fix? It seems to me that there would be a simpler solution!, or am I wrong?