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
Eastern Illinois University - Charleston, IL
After having tried numerous other methods, the first Spirovent was installed in Carman Hall to deal with a long history of no heat calls and clogging valves.
Purdue University - West Lafayette, IN
Spirovent exceeds expectations and leads the University to purchase and install (32) additional units at the village.
North Mississippi Medical Center - Tupelo, MS
High velocity 18" combination air eliminator and dirt separator.