Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:


Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

flow / Drainage system


Drainage holes are indispensable facilities for every building. As a standard configuration of ordinary
buildings, drainage holes are often clogged by foreign matters which leading to difficulties
in drainage. For outdoor drainage holes, most of the blockages are due to negligence in cleanup
or the accumulation of leaves and debris on the drainage hole covers during heavy rain or the typhoon
season. Therefore, how to effectively avoid drainage hole covers from being clogged, prevent
accumulated water on the rooftop, and keep drainage of buildings smooth are important issues this invention seeks to improve actively.


National Kaohsiung Normal University

National Kaohsiung Normal University
Kaohsiung, Taiwan