introduCtion How it Works ConCrete pipe stormwater treatment teChnologies box seCtions Click image to activate The Stormceptor works based on gravity drainage principles, where elements heavier than water (i.e. sediment) are allowed to settle within the settling chamber, while elements lighter than water (i.e. oil) are allowed to float and are trapped beneath the insert disc for later collection. Click on the animation above to view a demonstration of these principles. manhole and CatCh basin material LAFARGE PIPE eMANUAL PAGE 3