Re: Fuel drain manifold line.
Could it be an overpressure relief?
06 D3500 DRW Big Horn QC 2WD, 3.73, G56, BFG Commercial T/As, SuperChips Flashpaq, Cab-high Skaug body, Sparton pneumatics, K&N drop-in, Sirius. Valair dual-disc. 4x4x36 Magnaflow exits ahead of RH duals. LEDs at all ICC positions. Green LED floods at shift console(so you can get yer brew...er, Coke...in the cupholder in the dark...)
96 Grand Marquis GS pillow barge, 59000 miles.
Whiskey for my men, vasectomies for my enemies.