Calibration of water meters at home without removing the counter and without breaking the seals. The Federal accreditation service, given all the necessary documents for UK, TSZH, irc and Vodokanal Bugulma
More detail you can read on the Internet typing in the search word Gazmetrologiya, we know the entire country now conduct a verification and Bugulma. Quickly, efficiently, inexpensively, if the counter is not working properly then in fact do not take money