Weasel Keeper,
Yes, it is a Slimline F1. There is a large size fuel dot housing on the left side to allow the fuel tubing to pass through easily with the F1 probe attached. The F1 female fitting is on the right, so when not fueling the system is closed and no air can get into the tanks. This has worked very well up to this point and installing an F1 female fitting on my other planes has simplified the process. Although pricey I just love that Kavan pump. It fills the 24oz Dubro tank in one of my planes very quickly.