Brand New Original Goot Made in Japan Manual pumps suck up the solder, Goot® Soldering Pump (Original Japan) Soldering Sucker Plunger GS-100. Goot pumps are light, strong, and economical. Self-Cleaning Shaft When the plunger is pushed, a piston extends out the nozzle. This prevents solder build-up. Plunger Lock Function The plunger can be stored inside the shaft by pushing it in completely, and pressing the vacuum release button. Compact storage. Desoldering pump, also known as a solder sucker, is a manually-operated device that is used to remove solder from a printed circuit board.