Half a croissant, on a plate, with a sign in front of it saying '50c'
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Flush-ergy

 Water pressure energy powers automatic flush valve
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Sensor-operated flush valves in public restrooms require energy from batteries or solar cells. I propose recovering some of the energy from the incoming clean water to handle this energy requirement.
—kevinthenerd, Jan 17 2010

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       Wouldn't this make refill times slower and the whole system more prone to expensive maintenance? It could brutally bedevil and blight a busy bank of bogs.   

       Public toilets in the UK often have sensors, by the way.
—Aristotle, Jan 17 2010
   

       If you want a totally green sensor device to activate the flush, just put a pedal button on the floor for the patron to step on. Oh, wait, that's Baked.
—DrCurry, Jan 19 2010
   

       //totally green sensor device... to step on// eeew... after I step on it, where do I wipe my foot?
—lurch, Jan 20 2010
   

       <obligatory misreading> flush-orgy </om>
—bnip, Jan 21 2010
   

       //Plus, won't the sound from the rushing of water wake up people who are in the room, resting?//   

       In Taiwan, at sites of local interest, beauty spots etc., there are signs telling you what not to do. One of the them is often "Do not rest".
—Loris, Nov 15 2011
   


 

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