Down the Drain
October 4, 2020 3:46 PM Subscribe
According to Thames Water, dual-flush toilets specially designed to save water are wasting more than they conserve, thanks to leaking.
“The majority of [dual-flush toilets] use the drop valve system, which sits at the bottom of the cistern and opens to allow the water to flow out when the flush is pressed. Debris and other issues can cause the mechanism to fail to close, meaning water continually flows from the cistern and into the bowl.
“Older cisterns tend to use a siphon system, which works by pushing water upwards until it reaches a point at which it can flow into the bowl. Because that point is above the waterline when the toilet is not being flushed, the system is less likely to develop the same sort of leak.”
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