Manual windshield washer pump, as commonly found on vehicles in the 1960s. This pump works on a simple internal diaphragm to create pressure for squirting the water onto the windshield. When connected with the correct-diameter (small) hose, it provides more than sufficient volume and pressure to allow for cleaning. With a small windshield this might not seem important, until you consider the need to wipe off the mud or grime as you are still driving. Typically mounted under the edge of the dash. Also fits Sprite, MG Midget, and Morris Minor.

See GWW125 for electric version, or WSB101 for all-in-one bottle, pump, and bracket kit.