I bought a CB 4030 @ a auction last fall couldn't pass it up. It has a hard time keeping up have to fill it every 6-8 hrs. I came across a 240 gallon air compressor tank that is in great shape. i have a 90 ft run from my boiler to the house. Was thinking running it boiler-DHW-heat exchanger-storage and back to the boiler. Will this set up work and should i put a pump on the storage will i over flow the boiler?