These are flat-bottomed and designed for flat surfaces like sinks and tubs. They cannot form a seal in the curved throat of a toilet.
| Symptom | Observed Behavior | |---------|------------------| | No resistance | Plunger moves freely without building pressure or moving load | | Partial stroke | Plunger stops before completing full travel | | Fluid bypass | Fluid leaks past plunger (visible or internal) | | Jamming | Plunger stuck in retracted or extended position | | No output | System fluid/gas does not move despite plunger motion | plunger not working