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How to activate an automatic toilet to flush for a third time - Quora
HVP Magazine - Direct flush technology is the way forward for WCs
Simple Project 600w Upflush Toilet For Basement, Macerating Toilet Upflush System Kit - Included Silent & Powerful Basement Toilet Pump System With 4 Water Inltes For Upflow Toilet, Shower, Sink - Amazon.com
DirectFlush - The new generation of rimless WCs - Villeroy & Boch
Automatic direct flush kit, presence detection system - Autosanit.com
Public toilets: direct flush system or cistern
DirectFlush - iSi-Bricole
DirectFlush - La génération de WC sans bride - Villeroy & Boch