Originally Posted by dubrus
I had the 1/2" one years ago, like 15 years ago and it was crap, had to suck the fuel up to prime it. Maybe it was a duffer or they are better now. May pick one up.
Small diameter is pish. You want them as wide as possible. Using them is a bit of a knack.
1. Keep the can high - higher flow rates
2. Prime with quick bobbing until fuel is flowing without air in the hose - this increases the overall flow rate.
3. Keep the NRV off the bottom of the can until the level of fuel drops near empty - higher flow rates
4. When the level drops, tip the can and the speed of transfer flow will actually suck up the last few drops of fuel.