In article %5aSb.179963$xy6.858331@attbi_s02, Jay Honeck
wrote:

When the fuel tanks are full, it will take approximately 11 seconds to
drain all the fuel in one of the lines between a tip tank and the fuel
strainer and approximately six seconds to drain all the fuel in one of
the lines from a main tank to the fuel strainer. When the fuel tanks
are less than full, it will take a few seconds longer.

My God, Don, do you really *do* this?

I do, but remember, I fly rentals. No telling what airport the fuel
came from.

I don't know the fuel flow out of those quick drains, but they are
advocating holding them open for AT LEAST 34 seconds -- not counting the
individual wing sumps. Figure another second or two for four wing tanks,
and we're up to 42 seconds of draining gas, either on the ground or into
a -- what? You'd need a friggin' pan, or bucket! Before each flight? And
then what would you do with it all?

Get a GATS jar. They come in 12 and 16 oz size for the same price. ($20)
The belly drain will dump maybe 32 oz in the time necessary to sump
each tank.