I don't own a Sawyer extractor, but I have played with one and the suction is created by pushing down on the plunger. Yes it is counter intuitive but it does create a heck of a lot of suction. Try it on yourself, doesn't hurt.
_________________________
If it ain't bleeding, it doesn't hurt.
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.