There are some questions going around as to why the Snapp filter bowl isn't removable for servicing the cartridge. The simple answer is that threads on a bowl and in a housing use a lot of extra space and material in relation to the cartridge diameter and area. In a large housing the loss of element size doesn't impact the performance much. But in a housing the size of the Snapp, threads limit the filtration performance to just good enough. Instead, the Snapp housing is right-sized and optimized to provide the highest performance possible to protect small engines.
Link to Snapp Brochure