Sun filter elements are available as Surface Type ("Last Chance") and Depth Style elements.
The flow path is Port 2 to Port 1, side inlet and tip outlet, and should not be used in reverse, even with a reverse free flow check valve installed.
The elements collapse pressure is 210 bar, and the filters are intended to be used in line with the system.
Filter lifetime will depend on initial system cleanliness and the amount of dirt ingression to the system when operating.