I am using a Heatmore 400. It is mounted 70 ft from the house with a rise of about 4 ft. Inside are 3 water to air exchangers, the highest is another8 ft. I want to run the fluid through a filter before going into the pump so I would like to mount the pump in the house (4 ft) behind the filter before the manifold. Is the Taco 1/6 circulation pump mounted that far and 4 ft (12 total) higher than the boiler strong enough to circulate the fluid or should I install a shallow well pump? Will I need to install a expansion tank? What pressures should I be seeing in the line? Thank you for your suggestions.