LOW-INTENSITY LEAKAGE
As long-term associates, we received an invitation from the management of the company "Peštan" to help them solve problems in the plumbing installation-hydrant network. 
The leak was very difficult to notice, because the intensity of water leakage is very low. At the same time, the pressures in this part of the city's water supply network oscillate a lot, which makes it difficult to locate the place of water loss.
As this is a water supply network within the company, which is known to us from previous research, the job of locating a fault on the hydrant network has been made easier, considering the time required.
The correlation method narrowed the circle to the part of the hydrant network around the last building-hall to the north.
As a small part of the network remained, a visual inspection of the terrain around the building, which is in the same range - earth and asphalt surface, was performed. There were no visible signs of loss on the ground, but an inspection of the manholes with plumbing fittings revealed a fault in the manhole at the Ø80 mm pipe connection fitting.
LOCATED LEAK
By measuring with an ultrasonic flow meter on the part of the network that remained for the loss investigation, and which was isolated, approximately the same amount of water was determined on the basis of the issued bill for the consumed water for a month.
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