| 摘要 |
A water proof sheet slopes into a built-in shallow basin under a water device to collect any water leaking from the water tank in the device. Water sensitive elevated low voltage contacts in the basin are electrically connected to a relay. Conductors from the relay connect to shut-offs in the cold water supply, the hot water outflow and the power supply. Additional conductors connect from the relay to a valve on the outflow pipe to drain the tank and to a signal device. Alternatively, a water pump may be used instead of the valve on the outflow pipe to pump water to a distant drain, when there is no drain below the tank level into which to empty the tank.
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