No it is not. Pretty sure thats the tank line from FEL valve. The PB line is the soft line i showed earlier in the thread that terminates underneath the front of fuel tank. Basically impossible to get to without removing the rops/fenders. You can just tap into each line underneath the tractor though, i just didn't want extra running back and forth with lines.
You dont have to remove the tank. You just have to remove seat, rops, grips and rear fender assy. I did put a 3/8 bspp to 3/8 jic adapter there and ran a new hose, but It would be easier to just series into it underneath the tractor where it goes from hard to soft line. This is especially true when you remove the rops twice because the fitting underneath the seat is the only one that decides to leak out of 13 added on the project.