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
Maine Medical Center - Augusta, ME
Three of the larger Spirotherm® products on this multi-system project.
Unocal - Pacific Northwest, US
4" Spirovent® air eliminator being used to control foam in a bottling operation for transmission fluid and motor oil.
Red Rock Casino Resort Spa - Las Vegas, NV
24" high velocity combination air eliminator / dirt separator.