Conventional Solution

The traditional metal grating systems that screen by bores and slits are problematic.

Metal gratings are poor in debris screening.  Their tendency to rust also make removal for debris clearance a problem.

Concrete channel covers with bores and slits for drainage are heavy and hard to remove for clearance of clogging, making them breeding grounds for germs, roaches, and mosquitos.

High end covers of Stainless Steel grating or granite on Stainless Steel frame still have poor screening effect, leaving hygiene problem unresolved.

Existing drainage covers failed to screen debris.  Inevitably, a percentage of debris will drop into the channel during sweep cleaning which attribute to clogging and debris decay in covered channels despite hectic and frequent maintenance effort.

Drainage provision on Green Roofs that applied high end coverings keep the problem out of sight but unresolved.  Good looks cannot solve hygiene and maintenance problem.

PDC System is the ultimate Solution

PDC is recognised as SUDS (Sustainable Urban Drainage System) by the Department of Civil and Environmental Engineering in the Hong Kong Polytechnic University from case study funded with the Hong Kong Research Grant Council.

PDC resolves drainage problems that existing conventional drain covers cannot. PDC greatly reduces rats activities, debris decay, mosquito breeding and the need of toxic insecticide and pesticide sprays in channels it covered. PDC contributes to provide a better living environment to safeguard public health.