The heating networks from the boiler house at 12a Premudrova Street in the Lenin District will be checked using a dye.

      The Joint Utility Operator will check the tightness of the heating networks from the boiler house at 12a Premudrova Street in the Leninsky District of Nizhny Novgorod using Uranin A. An organic dye will be added to the heat carrier to identify possible leaks and unauthorized extraction points on the pipelines. This was reported by the Joint Utility Operator. About 190 facilities in the Leninsky District receive heat from the boiler house at 12a Premudrova Street. Among them are 166 multi-apartment residential buildings on Hero Samochkina, Dnepropetrovskaya, Premudrova, Snezhnaya streets, and several adjacent ones.

      Diagnostic activities will take place from April 6 to 10. The tests will allow for the diagnosis of the heating network complex of the boiler house and prompt measures to eliminate identified defects to improve the reliability of heat supply. The method of diagnosing pipelines using dye is used in closed heating systems, where heating and hot water are supplied through different circuits. It allows for quick and accurate identification of defective areas in the networks due to visual fixation of even the smallest damage.

      It is important to note that the dye Uranin A (sodium fluorescein) is completely safe for humans and the environment - it is also used in the cosmetics industry and medicine. During the tests in the area of facilities receiving the heat carrier from the boiler house at 12a Premudrova Street in the Leninsky District, specialists and residents may notice areas where the dyed network water surfaces with a characteristic yellow-green color. This indicates that the tightness of the system has been compromised.

      The Joint Utility Operator requests that any such cases be reported via the 24-hour hotline at 8-831-277-22-22, or using the "Report a malfunction" option on the website teploenergo-nn.ru, specifying the address. Dispatch service specialists and the call center will operate in an enhanced mode during this period.

      For reference: Uranin (sodium fluorescein) is a disodium salt of fluorescein in the form of red-orange or red crystals. It dissolves well in water and is therefore widely used in various industries. The main purpose of Uranin is to serve as an indicator for detecting leaks of various liquids and finding unauthorized losses. This dye is considered completely safe for humans, does not pollute leak sites, and is fully eco-friendly.

      Moreover, Uranin A is widely used in household chemicals for coloring detergents, therapeutic salts, soaps, and shampoos. It is also used to dye aquarium water and water in decorative ponds. Uranin is used in medicine, where a solution of sodium fluorescein is in demand in ophthalmological practice. The dye is also used in the production of life jackets - the substance is sewn into the fabric. If such a vest ends up in water, a bright green spot forms on its surface, which can be easily seen from an airplane when searching for a person.

      The boiler houses under the responsibility of the Joint Utility Operator are designed in such a way that the hot water circuit and the heating circuit are separated. Hot water and heating (supply pipes) come from the boiler houses through two different pipes. And through two other pipes, they return separately back to the boiler houses (return pipes). This is the so-called four-pipe system, which is used everywhere except for the networks from the Sormovskaya CHPP, designed according to the open heating supply scheme.

      More news about the event:

      Yellow-green water may flow in houses in the Leninsky District. Employees of the Joint Utility Operator will check the tightness of the heating networks in the Leninsky District using dye from April 6 to 10. 16:00 02.04.2026 vGorodeN.Ru - Nizhny Novgorod

      Heating networks from the boiler house at 12a Premudrova Street in the Leninsky District will be checked using dye. The Joint Utility Operator will check the tightness of the heating networks from the boiler house on April 2, 2026, Nizhny Novgorod Water Canal - Nizhny Novgorod

      Yellow-green water may flow in the homes of Nizhny Novgorod residents in the Leninsky District. Photo: Joint Utility Operator. The tightness of the heating networks from the boiler house at 12a Premudrova Street will be checked using a special dye. 14:18 02.04.2026 Network publication Living in Nizhny - Nizhny Novgorod

      Heating networks from the boiler house at 12a Premudrova Street in the Leninsky District will be checked using dye. Diagnostic activities will take place from April 6 to 10. The Joint Utility Operator will check the tightness of the heating networks from the boiler house on April 2, 2026, Time N - Nizhny Novgorod

      Heating networks in Nizhny Novgorod will be checked using dye. The heating networks in the Leninsky District of Nizhny Novgorod will be checked for tightness using an organic dye. 13:26 02.04.2026 NTA-Privolzhye - Nizhny Novgorod

      Heating networks from the boiler house at 12a Premudrova Street in the Leninsky District will be checked using dye. The Joint Utility Operator will check the tightness of the heating networks from the boiler house on April 2, 2026, Administration of Nizhny Novgorod - Nizhny Novgorod

      News from neighboring regions on the topic:

      Residents of Ryazan were warned about the shutdown of hot water and heating. Since 9:30 on April 2, there has been no heating due to repairs on the supply pipeline on 10th Line Street, house No. 37. 13:07 02.04.2026 Rzn.Info - Ryazan

      Kindergartens, hospitals, sanatoriums, houses: part of Yuzhno-Sakhalinsk will temporarily be without heating on Friday. The Sakhalin utility company has scheduled work on the networks for April 3. 15:13 02.04.2026 News.Astv.Ru - Yuzhno-Sakhalinsk

      Houses on three streets in Yuzhno-Sakhalinsk were left without heating for 6 hours. The Sakhalin utility company has scheduled work on the networks for April 2. 09:42 02.04.2026 News.Astv.Ru - Yuzhno-Sakhalinsk

      The unified operator stops water supply in parts of Makhachkala. On March 31 at 11:46, the unified operator in the field of water supply and wastewater published a message about the cessation of water supply to part of Makhachkala. 12:36 31.03.2026 New Deal - Makhachkala