I am getting ready to set up the 500 gallons of pressurized storage for my old smokey indoor non gasser. I am plumbed up using the simple pressurized storage set. Here's the thing, the wood boiler circulator is going to want to move water at a low of lets say 160*. When you get your tank up to a high of lets say 180ish and the fire has not totally gone out, the way I see it is the circulator on the boiler will keep moving water till it sees 160* and that will keep going because there is 180* water in the tank. This will be wasting stored btu's due to heat losses in the pipes an boiler, especially if this is in the warmer parts of the season and there is no heat load. Has anyone come up with a good way to stop the boiler from stealing the heat in the tank while allowing the fire to die out? I have my own idea but I am looking at more aquastats, relays, pumps ect. Just wondering if anyone has a simple method for preventing this.