I am going to be installing a Saniflo toilet, along with a shower and also a bathroom sink. This is in a basement of my one story ranch. I have septic and well. I am wondering if a will need vents in between the shower and the macerator? And also between the sink and the macerator? I know there is one vent on the Saniflo macerator. With that being said, could I just put one of the "cheater vents" on the vent from the macerator, and be done with it? Or would I need to put a horizontal vent going through my foundation? Any help would be greatly appreciated. I am planning on installing within the next week if I could get any feedback. Thanks

No cheater vents, AAV, allowed on the Saniflo. It must have its own dedicated vent. Tell me where your currect sewer line exits this ranch please.

How many vents are needed for Saniflo Toilet? Two.

I am wondering if a will need vents in between the shower and the macerator? And also between the sink and the macerator?Not if wet vents are allowed in your area,(see image)

I know there is one vent on the Saniflo macerator. With that being said, could I just put one of the "cheater vents" on the vent from the macerator, and be done with it?No, not on the pit vent. However If AAV's are allowed you can vent the lavatory with one. This AAV can't be walled up. It has to be left open for service and replacement.
As I understand it the pit vent can revent back to a dry house vent or run out the roof. Good luck, Tom