When I add a printer I have the following stages:

1. Name and other stuff like location
2. Connection type, where I can choose AppSocket, http, ipp, lpd and scsi printer. I choose AppSocket.
3. Connection URI. I type socket://192.168.1.80
4. Manufacturer and model or ppd. In the manufacturer list I just have generic cups pdf printer and raw.

So I use the ppds.