Sorry, It's AIR OPERATED, Not Electric.
Ball lever regulates the open/close Air valve.
2 Brass cylinders are Suction chambers [1 up & 1 down w/ back & forth motion of pump handle]. They have check flaps to allow passing thru liquid on down stroke, close on up stroke to pull more liquid & push what it just passed thru up into glass cylinder.

Last edited by Dick Bennett; Mon Oct 29 2012 03:45 PM.