• The Basics
• Eyedroppers
• Retracting-nib safeties
• Lever-fillers
• Button-fillers
• Piston-fillers
• Crescent-fillers
• Twist-fillers
• Bulb-fillers
• Pump-fillers
• Vacumatics
• Plunger-fillers
• Blow-fillers
• Touchdowns/Pneumatics
• Snorkels & PFMs
• Capillary fillers

Pump-fillers require multiple strokes to fill.  Most use reciprocating plungers, but the classification comprises many different mechanisms.

Most pump-fillers work on the same principle as bulb-fillers .  Many have transparent barrels which show the ink level within.  Dunn was one of the first companies to sell a pump-filling fountain pen; the system was also used by Sager, OMAS, and Osmia, among others.  Waterman's Ink-Vue was a pump-filler that used a jointed lever acting on a small sac instead of a reciprocating plunger, while Wahl-Eversharp and Conklin both sold similar pump-fillers that twisted the small sac instead.  The Parker Vacumatic was a pump-filler, as was the 51 for the first several years of production; click here for filling instructions specifically for Parker Vacumatics and Vac-filling 51s.