If you use the same inline filters, then I personally find trapped air isn't an issue.
However I don't have my pumps high, but I have disconnected my main hose from my tank for numerous reasons and this will give you trapped air.
A slight turn of the clear lid on the filter, whilst running the pump, untill the lid is full of water and hence releasing the air. At least between tank and pump. From pump till the brush, just open all connections until the air empties through.