Getting ready to put my system together, and was wondering about the thermo-siphon capabilities of my LK 810. I understand how it works, but.... Boiler loop pipe is all 1 1/4", and the tank is only 4' from the boiler. Top of storage input bung is 1 1/4", but the bottom of my tank where I was going to pull the water to the loading unit, has an existing 1" bung, (that I didn't want to replace, and the guru's on this site have said wouldn't hinder boiler flow), but, it is about 10" below the level of my boiler input, therefore 10" below the level of where I was going to place my LK 810. Will the thermo-siphon draw through the LK 810 and 1" bung, be enought to pull the cooler water "UP" from the bottom of my tank in a power outtage? Or do I need to draw from level? The input pipe to the storage tank is 9 1/2 feet above the output, so should thermo-siphon big time, I would think. Makes a big difference on how I plumb it. I'm hoping to utilize thermo-siphon as my overheat protection. As long as I use batch burns, and don't fill the burn chamber when storage is close to full it should work great, but not sure on the pipe levels and that 1" bung. I could also place the LK 810 at the same level as the bung, and use 45 degree elbows to get back up to the boiler input level, to help with the flow. What do you think?