Can anyone tell me? I am thinking I will order a termovar loading unit to install in my pressurized dual tank setup. My solo 60 is 10 feet from the two storage tanks. What I want to know is if the termovar has 1.25 inch fittings and my tanks have 1.25 inch fittings , is it worth the effort of installing 1.5 inch piping for the parrallel plumbing if it has to go through 1.25 fittings on both ends. The reason I ask is because my boiler is already oversized for my heating loads. I want to be able to move as many BTU.s to storage as possible to prevent idleing. Will the diameter restriction in the termovar and the top of tanks make it not worth it?