>I'm willing to live with the risk of a
clogged vent. If a vent clogs, I'll be coming down faster from fuel starvation
than from over pressurizing the tank
_______________________________________________________________________________________________________________
I recently reconfigured the fuel system in my
Velocity.
The wing tanks drain to a split (left/right)
sump tank.
All tanks are vented to a common manifold
which sits up high and has two vents for redundancy.
Each side of the sump is vented to the
manifold with an inline check valve. That allows air out of the sump but
not in,
Each wing (Strake) tank is vented to the
manifold.
As a safety measure the manifold has a
check valve that allows air to flow into the vent system (from the cabin) should
the external vent ever become obstructed.
Since the system would normally be slightly
pressurized, the check valve is typically closed.
2 cents & change.
T Mann