Many thanks. I've been telling folks that the "blue" seal on their pumps isn't worth two squirts of duck poop. It is a soft material, and swells up pretty quickly in this new fuel.
I have one of our pumps soaking now for over a year in ethanol fuel and it hasn't swelled up at all.
We actually gave up on the suppliers to put a good seal on the pumps that we buy. I have at least 1000 blue and black seals here that were removed from those pumps, for sale cheap!.....Cliff