Validation water meters

To be able to on-line monitor the water consumption, it is beneficial to install one´s own check wet-running water-meter with higher flow-rates behind the master water-meter, and to connect the subsequent BONEGA sensor and further the BONEGA radio transmitter to it. Such investment is not very high, because one can acquire the water-meter for about 1.000,00 CZK excl. VAT and the special sensor for about 1000,00 CZK excl. VAT as well. A check wet-running water-meter like this brings several advantages:

Opportunity to compare water consumption with supplier´s water-meter

Practice shows quite many cases when the complaints about master (inflow) water-meters are justified. Sometimes, even after a not acknowledged complaint and the replacement of master water-meter, the difference between master water-meter and sub-meters in flats is reduced from original 25% down to 2% to 3%. In both cases, the investment pays off very quickly (in many cases, the savings are very large).

Exclusion of different times when master water-meter and sub-meters are read

Through reading the auxiliary inflow water-meter and sub-meters at the same moment you will receive impartial differences in measurement.

Opportunity to reveal water leaks, or possible frauds prior to sub-meters

By definition, the sub-meters (flat water-meters) cannot reveal water leaks running prior to them. Thanks to the check water-meter you will have an immediate overview about suspected differences in the consumption measured by the check water-meter and the sum of consumptions at sub-meters.

Tenants are continuously informed about approximate price of water

According to the European Union, it is not sufficient to inform about water consumption only once a year. Owners of houses should allow the households to monitor their water consumption continuously. The check water-meter, which is placed immediately behind the master water-meter, offers the most accurate calculation These are in particular: EUROPEAN DIRECTIVE 2012/27/ EU DIRECTIVE 2012/27/EU OF EUROPEAN PARLIAMENT AND OF THE COUNCIL FROM 25 OCTOBER 2012 ON ENERGY EFFICIENCY, AMENDING DIRECTIVES 2009/125/ES AND 2010/30/EU AND REPEALING DIRECTIVES 2004/8/ES AND 2006/32/ES (in force from 1st January 2017).

The sub-meter is usually placed:

as near to inflow (master) water-meter as possible, namely between it and the subsequent internal water distribution system in the building
in other water pipes, such as rising mains, where they help find water leaks outside sub-meters

It is also the cheaper traditional BONEGA sub-meter (to be used in flats) that can be used as a check water-meter (for example for “rising mains”), if flow rates do not exceed 3,13 m3/h (Q4) with DN 15, or 5,0 m3/h (Q4) with DN 20. Note: for an easier replacement of a water-meter, it is suitable to place closing valves on its both sides.

Note: for an easier replacement of a water-meter, it is suitable to place closing valves on its both sides.