Fuel tank breather tube joint question

[Beer van Huet]

Hello,

I am trying to straighten out my tubing and I am curious why the fuel tank breather tube ends in a 3-way joint with only one other tube attached to it (No 2 in the attached tank fiche). It is a vent tube, so not a big deal; just wondering if I missed connecting some other tube. Can someone confirm that one end of the ( No 2) 3-way joint is not used in the Valkyrie?

TIA,

Beer

[Warlock]

Just in case the bottom one gets plugged off it will still vent
David

[N8171S]

The "T" in the line is also an anti siphon device so if the tank is over filled fuel won't siphon.  It is also a safety in case the bottom of the hose gets plugged.

[Valker]

....and it keeps stuff from being sucked up into the tube when the fuel tank cools.