Step 'N' Flush

SYSTEM OVERVIEW

Designed a mechanical, foot-operated toilet flush mechanism that eliminates hand contact without requiring electricity or batteries. The system is low-cost, durable, and retrofit-compatible with existing toilets, targeting hygiene improvement in public restrooms.

MY CONTRIBUTIONS

• 01

  Helped design the pedal and handle interface, accounting for variable flush handle geometries and wet operating environments

• 02

  Evaluated materials and fastening methods suitable for moisture exposure and repeated mechanical loading

• 03

  Selected and integrated off-the-shelf components (cables, fasteners, adhesives) to minimize cost and simplify installation

• 04

  Fabricated functional prototypes using dual-nozzle 3D printing (PLA + TPU)

• 05

  Supported on-site testing across UC Berkeley restrooms, collecting user feedback via QR-linked surveys

• 06

  Iterated designs based on user feedback and instructor review

RESULTS

• Delivered a fully functional, battery-free flush mechanism validated through real-world deployment

• Strong user adoption and usability through survey feedback

• Top course evaluation