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Table 4

Estimated volume lost to leakage

Sanitary equipment typeType of leakEstimated loss
Faucets (bathroom, sink, general use) Slow drip 6–10 liters/day 
Medium drip 10–20 liters/day 
Fast drip 20–32 liters/day 
Very fast drip >32 liters/day 
Stream Ø 2 mm >114 liters/day 
Stream Ø 4 mm >333 liters/day 
Leak in flexible connector 0.86 liters/day 
Urinal Visible stream 144 liters/day 
Leak in flexible connector 0.86 liters/day 
Leak in register 0.86 liters/day 
Flush toilet Visible streams 144 liters/day 
Leak from the tube that fills the tank 144 liters/day 
Valve sticks open when flushed 40.8 liters (assuming the valve is open for a period of 30 seconds, at a flow rate of 1.6 liters/second) 
Shower Leak in register 0.86 liters/day 
Leak in feeder pipe near wall 0.86 liters/day 
Sanitary equipment typeType of leakEstimated loss
Faucets (bathroom, sink, general use) Slow drip 6–10 liters/day 
Medium drip 10–20 liters/day 
Fast drip 20–32 liters/day 
Very fast drip >32 liters/day 
Stream Ø 2 mm >114 liters/day 
Stream Ø 4 mm >333 liters/day 
Leak in flexible connector 0.86 liters/day 
Urinal Visible stream 144 liters/day 
Leak in flexible connector 0.86 liters/day 
Leak in register 0.86 liters/day 
Flush toilet Visible streams 144 liters/day 
Leak from the tube that fills the tank 144 liters/day 
Valve sticks open when flushed 40.8 liters (assuming the valve is open for a period of 30 seconds, at a flow rate of 1.6 liters/second) 
Shower Leak in register 0.86 liters/day 
Leak in feeder pipe near wall 0.86 liters/day 

Source:Gonçalves et al. (2005).

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