Unplug the leak detector (water stop) and  reconnect after 30 seconds; switch noise at the  leakage water valve (black box on the water  tap) must be audible.
Odklopite detektor puščanja (zaustavitev vode) in ga znova  priklopite po 30 sekundah; preklopni šum na ventilu za  uhajanje (črna škatla na vodni pipi) mora biti slišen.