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

Dirt Separator Piping
Install the Spirotrap® typically ahead of the system component being protected, such as the boiler in this drawing.
Purdue University - West Lafayette, IN
Spirovent exceeds expectations and leads the University to purchase and install (32) additional units at the village.
Red Rock Casino Resort Spa - Las Vegas, NV
24" high velocity combination air eliminator / dirt separator.
American Museum of Natural History - New York, NY
Custom fabricated 30" high velocity air eliminator installed to solve noise problems in the existing system.