Install the Spirovent® at the point of lowest solubility, which is the place in the system where the temperature is the highest and pressure the lowest. Note as well to always "pump away" from the expansion tank, never towards it.
Related Work
Commercial Gallery
Spirovent® is now the basis of design in many specifications by the top consulting engineering firms for new construction.
University of Michigan - Ann Arbor, MI
Replacing the old style centrifugal separator after two years of unsatisfactory system performance, the Spirovent solved the problems within two months.
Unocal - Pacific Northwest, US
4" Spirovent® air eliminator being used to control foam in a bottling operation for transmission fluid and motor oil.