.  The lifetime for
> you canister is dependent on how much vapor you are putting through it,
but i'd probably
> do what Dave said and sniff the stuff and see if you smell gas.

Not likely... you're talkin' to a guy who wears a full respirator to fill
his gas tank! ... unfortunately for me, one good whiff of gasoline is good
for a 3 day migraine headache... I've learned... it's called chemically
sensitive :(

Bill