As you know, apartments in high-rise city buildings are most often supplied with hot water coming from central system water supply. This service is an integral part of ensuring the comfort of living in multi-apartment buildings. Perhaps many residents do not know, but the temperature supplied to the end points of water consumption is not a whim of the boiler house employees or clerks of the heat supply organization, but is set by the relevant legislative acts standardized value.

However, unfortunately, the temperature hot water does not always comply with established standards, which leads not only to serious inconvenience, but sometimes even creates certain risks for human health. Therefore, you should not treat such violations passively, as they can lead to negative consequences and the perpetrators will not be held accountable.

So, this publication aims to provide information on what the hot water temperature standard is set for - what to do in case of non-compliance with the standards, and where to contact on this issue.

Hot water in a house or apartment has long been considered no "luxury" - it is a necessary "attribute" of life modern man. However, sometimes it happens that the housing company, which has assumed the obligation to control the hot water supply at home, does not always fulfill its obligations in good faith (paid, by the way, by the residents themselves). In this regard, the owners or tenants of apartments have a fair question about what is the reason for these violations of the established temperature standards.

All apartment owners in high-rise buildings are well aware that hot water is sold to consumers for much more high price than cold. If the hot water supply is maintained within the established SanPiN temperatures, then the hot water is diluted large quantity cold, resulting in the most acceptable for the human body, warm. That is, in this case, much less hot water is used, and you will also not have to pay so much for it. But when the water from the DHW supply pipes is initially warm, then there is no need to dilute it with cold water, and in this option, the residents pay for it as for a full-fledged hot one, respectively, and the amount in the payment will be much larger.

However, unreasonably increased payment is not the biggest disadvantage of water not heated to the desired state. There are also more serious risks that can negatively affect the health of people, especially those with weakened immune systems.

AT Russian Federation, as in all civilized countries of the world, certain standards for the provision of utilities. This list includes, among other things, the quality of water supply, cold and hot.

In the Russian Federation, standardized standards for the supply of hot water to residential buildings are prescribed:

- in the "Sanitary and epidemiological rules and regulations" (SanPiN 4723-88 " Sanitary regulations arrangement and operation of centralized hot water supply systems”);

- in the "Rules for the provision of utility services to owners and users of residential premises in multi-apartment and residential buildings", which were approved by Decree of the Government of the Russian Federation No. 354 of 06.05.2011.

According to them:

• The norm of the outlet hot water temperature indicator (on consumption devices) in apartments connected to the central water supply ranges from 60 to 75 degrees.
• In addition, a small exception-clarification was made. So, for houses connected to closed system heat supply (wired from galvanized pipes and heated water in boilers), the water temperature must be at least 50 degrees, with an upper limit of 60 degrees. This is usually stipulated in contracts for the provision of relevant services.

Here it is necessary to clarify that the temperature of hot water should not depend on the season - it should always be in the specified standard range. Negotiated tolerances, but even then they concern only the time of day. So, in the daytime, a deviation from the specified range (up or down) within three degrees will not be considered a violation, at night (it is considered, by the way, from 0.00 to 5.00) - five degrees.

There are several other temporary exceptions stipulated by legislative documents, when the heating rate can be reduced, or the hot water supply is suspended. To similar situations the following points apply:

• Carrying out preventive scheduled work, in which problems that have arisen during the operation of the system are eliminated in various nodes of the communication network.
• The occurrence of an emergency on one of the sections of the highway or the failure of equipment at pumping stations.

At the same time, such situations cannot last for an arbitrarily long time - the rules also provide for temporary norms for suspending the supply of hot water:

• No more than eight hours (total) per month.
• No more than four hours in a row.
• Not longer than a day in the event of a serious accident.

In accordance with the above guidance documents, the organization responsible for providing utility services to consumers, is obliged, on its own or with the involvement of other persons or companies, to ensure Maintenance engineering systems inside the house, with the help of which the services specified in the contracts are provided. In addition, this organization must recalculate tariffs for poorly provided utilities or their provision with interruptions that exceed the allowable duration.

For example, if the accident was not eliminated within 24 hours, the residents of the house (in the absence of meters) have the right to recalculate the payment for hot water for certain days of this month.

What is the importance of temperature standards for hot water supply?

Controlling the temperature of hot water supply is important, as mentioned above, not only for economic reasons, but also from the standpoint of maintaining the health of residents, which is especially true for children and people with disabilities or chronic diseases. Therefore, water temperature indicators should not exceed the permissible threshold or be below normal.

• The first thing to consider is that the temperature can often be not only low, but also exceed the established norms, and this creates a considerable risk of burns. To eliminate the possibility of such damage, mixers are installed, with the help of which the desired temperature water. Each user should remember what temperatures and how they can affect the human skin:

- + 50 ° C - partial burn is possible with an exposure duration of 90 seconds or more;

- + 55 ° C - the same situation, but the burn occurs in 15 seconds;

- +60°C - probably thermal damage skin when exposed for 5 seconds;

- + 65 ° C - severe skin burn in 2 seconds;

- + 70 ° C - immediate severe and deep burns of the skin and adjacent tissues.

This information must be taken into account if the apartment has Small child- consideration should be given to eliminating the possibility of his uncontrolled access to hot water taps.

• The reduced temperature of the incoming "hot" water is not only its overspending and other domestic inconveniences, but also a prerequisite for the emergence of a number of other problems. unpleasant situations. In particular, in the closed space of pipes, with a decrease in the temperature established by the standards, a favorable environment is created for the appearance and reproduction of various bacteria, which can cause temporary intoxication in humans or even acute or chronic diseases.

A typical representative of such a pathogenic microflora is the legionella bacterium, the favorable habitat, development and reproduction of which is exactly warm fresh water. This microorganism is a gram-negative rod, no larger than 3 microns in size.

These microorganisms thrive in warm water, and also willingly settle in air conditioners and low-temperature heating systems. Legionella can cause various diseases, flesh to lung infections and pneumonia with related complications. This bacterium can enter the human body while taking a bath, shower, when washing or brushing your teeth, as well as when eating from dishes that were washed with insufficiently warm water.

If the water meets the standards, then it is heated to more high temperatures minimizing the risk of infection to consumers. So, heated to 80 ÷ 90 degrees in boiler rooms central water supply water practically goes through the process of complete thermal disinfection.

The effect of temperature on the above pathogen looks something like this:

- Water below + 20˚С: the bacterium is inactive - it does not multiply, but does not die either.

- +25÷45˚С: the most favorable temperature for the development and reproduction of legionella.

- +55˚С: if this temperature is continuously maintained, then these microorganisms die in 5÷6 hours.

- +60˚С: the death of the entire colony of bacteria occurs within 30÷35 minutes.

- + 65˚С - legionella dies within 2 minutes.

How to achieve quality hot water services?

Monitoring compliance with temperature standards for hot water

So, in order to be able to achieve the restoration of the quality of the provision of such utilities, in order to make it possible to save on payments by making claims to the hot water supplier, it is necessary to periodically temperature measurements. Moreover, this check should be carried out correctly, since the deviation from established algorithm its implementation will lead to a possible non-recognition of the result.

The measurement procedure consists of four stages and is carried out in the following order:

• The first step is to prepare a glass or other container and a thermometer for measuring water temperature, which has a scale of up to 100 degrees. Attention - mercury thermometers for such measurements in residential premises - are unacceptable.
• After that, the hot water tap is fully opened.
• Further, it is required to wait 3 ÷ 4 minutes until the cooled stagnant liquid flows out of the pipeline (although, in theory, with a properly established circulation of the central hot water supply, there should be practically no stagnant sections).
• After water with a uniform temperature comes out of the tap, it must be drawn into a glass, which is installed directly under the stream.
• Next, a thermometer is placed in a glass filled with hot water. When the indicators on it are fixed, that is, the column (arrow) stops rising, the value must be recorded.

Requirement to recalculate or change the tariffication of the service

If measurements regularly taken throughout the day show that the temperature differs from the standard by more than 3 degrees, then it is possible to require the management company to eliminate violations, and if such elimination is not possible at the moment, then reduce the tariff for hot water (providing payment discounts).

This rate reduction is 0.1% per hour for every three "missing" degrees. Well, if the temperature of the incoming so-called “hot” water is below +40 degrees, then payment for the service should be made in general at the rate of cold water supply.

However, such a reduction in payment is possible only if the temperature indicators are not only recorded by the consumer, but also documented. Unfortunately, employees of organizations responsible for hot water supply practically do not constantly monitor the temperature state of water, and even when contacting them with appropriate claims, they carry out such monitoring with obvious reluctance.

Therefore, before contacting management company very often tenants independently calculate the required discount. Similar calculations are made after taking temperature readings for several days:

• For this, the number of days in which a decrease in the temperature of hot water was observed is taken - this number must be divided by the number of days in a month.
• The resulting result is multiplied by the established tariff for hot water supply. This value will become the discount that will have to be deducted from the total monthly tariff.

Thanks to the independent calculations, it would seem that it is possible to control the recalculation that the management company will do. But in reality, everything turns out to be much more complicated. Therefore, in order to achieve a reduction in invoices for payment, after self-measurement of indicators, the following actions must be taken:

• The first step is to call the emergency service to inform the dispatcher that water is entering the house that does not meet the standards. The dispatcher accepting the appeal must register it under a certain number, which must be remembered, but it is better to write it down. In addition, it would be reasonable to record the name of the employee who accepted the application and the time it was submitted.

It is possible that the responsible employee is already aware of the reasons that caused temporary deviations from the norms of hot water supply and can inform you when everything will be restored. If not, then let's move on to the truth.

• Upon the received appeal, within a few days, the management company must send an inspector or another of its representatives, who, after making sure that the information is correct, draws up an act on inadequate water quality.
• In the event that employees managing organization“They are not in a hurry” to visit the house in order to deal with the reasons, the act can be drawn up on their own by inviting several neighbors who must sign the document, thereby certifying the data received.

Such a document is recognized as legally significant, therefore, on its basis, it is quite possible to draw up an application addressed to the head of the State Housing Inspectorate or public utilities, indicating in it all the data received, as well as legal documents regulating service standards, and the time of consideration of the application.

The application must also state the reason for the request. poor quality water". On the document submitted to the housing inspection, the inspector should receive a response about accepting the application for work, after which it remains to wait for a solution to the problem.

It should be noted that the best option will be the preparation of a collective application from the whole house or from the majority of its residents. In this way, you can speed up the procedure for considering a complaint and restoring hot water temperature standards.

Installation of modern devices for quantitative and qualitative accounting of water consumption

AT recent times Increasingly, apartment residents, faced with similar problems and desperate in the fight against housing and communal services bureaucrats, are trying to install individual meters for water consumption, both cold and hot. And if there is a financial opportunity, then the best choice there will be a “smart meter” installation - it will justify itself pretty quickly.

A temperature sensor is installed before entering the water meter. As a result, such a device captures water consumption in real time, taking into account both volume and temperature. If the value of the hot water temperature does not correspond to the standard, then the billing automatically goes at a reduced rate, or even in general - as for the consumption of cold water.

By the way, there are cases when employees of management companies flatly refuse to register such multi-tariff water metering devices and accept payment according to their testimony (despite the existing certificates of conformity of water meters), motivating this with a bunch of all sorts of obscure excuses. It is understandable - often such a technique becomes a "bone in the throat" for them, since there is nowhere to escape from the dispassionately recorded timing of violations.

If you are faced with such opposition, you should seek recognition of your innocence, referring to the already mentioned above Decree of the Government of the Russian Federation No.

Below is a quote from Article No. 31 of this Decree (an extract of two paragraphs, “t” and “y”), which, after a careful reading, should, in theory, remove all questions on this issue:

Contractor (that is, a legal entity, regardless of the organizational and legal form or individual entrepreneur providing utility services to the consumer) is obliged to: ...

t) not create obstacles to the consumer in exercising his right to install an individual, common (apartment) or room metering device, corresponding to the requirements of the legislation of the Russian Federation on ensuring the uniformity of measurements, including a metering device, the functionality of which allows you to determine the volumes (quantity) of consumed communal resources differentiated by time of day ( established periods time) or according to other criteria reflecting the degree of use of communal resources, even if such an individual or common (apartment) meter according to functionality differs from the collective (common house) metering device, which is equipped with an apartment building;

at ) to carry out, at the request of the consumer, commissioning of the installed individual, common (apartment) or room metering device, corresponding to the legislation of the Russian Federation on ensuring the uniformity of measurements, even if such an individual or common (apartment) metering device differs in functionality from the collective (common house) metering device that an apartment building is equipped with, no later than a month following the date of its installation, and also proceed to the implementation of calculations of the amount of payment for utilities based on the readings of the metering device put into operation, starting from the 1st day of the month following the month when the metering device was put into operation; …

Water consumption meters - how to choose and install yourself?

By installing water meters, many problems related to the quantity and quality of consumed utilities are often solved at once. Read more about it in a special publication of our portal.

How to write a claim for the elimination of violations?

If the desire to restore the normal temperature regime in the hot water supply system has not passed, then after fixing the violations, it is necessary to proceed to the “documentary part” of the process. So, the consumer (or a group of consumers) expresses his claims by filing an application.

The application is drawn up according to the established model, in legible and neat handwriting.

• In the right corner of the document being drawn up, you should indicate the official and organization to which the application is sent, as well as the last name, first name and patronymic of the person from whom it is written, and his contact details - residential address and telephone numbers. If a collective complaint is filed, this fact should be clarified.
• Further, retreating 50 ÷ 60 mm down, the word “Statement” is written and it is indicated on what occasion it was drawn up. In this case, it is best to indicate Article 7.22 of the Code of Administrative Offenses, which provides for liability for violation of the rules for the maintenance and repair of residential buildings.

• Further, the text of the complaint itself is written, which is also drawn up in a certain form. First, the address of the house where they are not performed is indicated. established SanPiN hot water standards, and then describes the essence of the problem.
• At the end of the drafted text, there is an appeal to the manager of the Housing Inspectorate with a requirement to check the fact of the violation, and issue an order to eliminate the problem that has arisen, as well as recalculate hot water tariffs for a certain period. In addition, we can safely demand, in accordance with Article 7.23 of the Code of Administrative Offenses of the Russian Federation, that administrative penalties be applied to employees guilty of regular violations of hot water supply standards.
• At the bottom of the document is the date of the application and the signature of the applicant or applicants, when filing a collective complaint.

Filing an application can be called the first part of the process of restoring justice. Further, after filing a complaint, you should wait for a response from officials who are required to respond within (maximum) 30 working days from the date of receipt of it. Then troubleshooting should follow. If this did not happen, and normal temperature regime water was not restored, and the recalculation was not made within a month and a half, then the residents of the house have the right to go to court. In the same way, a complaint is filed if the water has bad smell, taste, dirty or cloudy appearance.

In order for the consumer to have a chance to defend his rights in case of violation of water quality standards, it must be remembered that when drawing up an agreement between him and the supplier, all the norms of the public services provided, which are defined by law, must be prescribed. Therefore, before you put your signature on the contract, you should carefully study it, including all footnotes, including "written in small print."

Expected changes in the standards for the provision of DHW services

Recently, Rospotrebnadzor has been actively discussing the issue of lowering the temperature standard for hot water supply from 60 to 50 degrees.

At the same time, two options for solving the problem are proposed in order to save energy:

• The first option is to use special disinfectants for high-quality water purification, instead of heating. At the same time, experts assure that consumers will not be infected, as this is a more effective way to improve the quality of water supplied to apartments.
• The second option under consideration is to lower the water temperature to 50 degrees constantly and heat it up to +70 degrees only once a day. According to experts, when offering such a measure of thermal disinfection, it is more effective, and this is proved by world experience, since in many countries of the world this is the method of purifying water from bacteria living in it. To avoid accidental thermal injury among consumers, heating to high temperatures is suggested to be carried out at night.

There are, of course, ardent opponents of such changes, who operate on the following quite fair considerations:

• Firstly, they believe that it is still necessary to take into account the opinion of the consumers themselves on this issue, since the changes will primarily affect their comfort and the amount of payment for the services provided (it seems that although the lower heating limit will be lowered, the service will not be cheaper will follow).
• Secondly, with, alas, the current approach in the Russian public utilities to various changes, it is necessary to be prepared to receive parameters at the output that will be lower established standards, since even today they are far from being always fulfilled. For example, if we are talking about reducing the level of heating of hot water to 50 degrees, then in practice it is quite realistic to get no more than 40 ÷ 45 degrees at the output, which already "does not climb into any gates." And discounts for such temperatures, taking into account the permissible 3 degrees of deviation, will turn out to be generally ridiculous. In short, the consumer is once again the loser.
• Thirdly, the practice of functioning of the Russian housing and communal services does not in any way allow one to be sure that in all, without exception, municipalities high-quality cleaning will be carried out cold water before heating it. Well, this may well lead to an increase in the likelihood of various infectious diseases. Therefore, opponents of the discussed initiatives believe that in the conditions of the Russian communal system, only heat treatment water supplied to apartments is, in modern realities, really effective way disinfection.

To date, the previously developed standards are still in force, while the new ones were planned to be introduced from March 2017, but so far there has been no official confirmation or refutation of this issue. It is known, however, that such an idea has not yet received approval from the Government of the Russian Federation. But who knows, maybe this will happen someday if alternative proposals that have long been adapted in our public utilities are not heard.

Video: Insufficient hot water temperature is a problem in most regions of Russia

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Asked 2012-06-28 14:51:02 +0400 in the subject "Protection of consumer rights" from Moscow

Rules for measuring the temperature of hot water. Which document to trust? Today, Rospotrebnadzor, together with the HOA, measured the temperature of the hot water supply in the apartment. After a ten-minute drain at a rate above 1 liter per minute, the DHW temperature was 44.4 degrees at a rate of 60 degrees. There are three measurement methods. What to believe? 1. Decree No. 354 dated May 06, 2011: 5. Ensuring that the temperature of hot water at the tapping point complies with the requirements of the legislation of the Russian Federation on technical regulation (SanPiN 2.1.4.2496-09) * (2) * (2) Before determining the temperature of hot water in the water tapping point is drained for no more than 3 minutes (Appendix 1 to Rules 354). 2. GOST R 51593-2000. DRINKING WATER. SAMPLE SELECTION. 4.1.5 Water sampling from the consumer's tap Water sampling is carried out at the outlet of the taps of the internal water supply networks of houses. When sampling from a consumer tap, the time for draining water before sampling depends on the purpose of sampling. If the purpose of sampling is to assess the effect of materials in contact with water on water quality, then samples should be taken without first draining the water. For other purposes, 2-3 minutes of water discharge is sufficient to establish equilibrium conditions before sampling. 3. METHODOLOGICAL INSTRUCTIONS MUK 4.3.2900-11. Date of introduction: July 12, 2011 (G.G. ONISCHENKO). 4.3. CONTROL METHODS. PHYSICAL FACTORS HOT WATER TEMPERATURE MEASUREMENT IN DISTRICT HOT WATER SYSTEMS 5. Before sampling hot water, the water must be drained to a constant temperature. The time for draining water can be up to 10 minutes, depending on the state of the distribution network and the mode of hot water consumption by the consumer. When sampling at the point where hot water is supplied to the distribution network, water is not drained. Sampling is carried out in a container that meets the requirements of paragraph 3.2 of these Guidelines, with a continuous flow of water. The water flow should be at least 2 liters per minute (determined by the time of filling the measuring container). During sampling and measurements, excess water is poured over the edge of the sampling container into the tray, and from it is removed into the sewer. 7.6. To measure the temperature of the sampled hot water, the thermometer is immersed in the water under test in such a way that the thermometer ball (or SI sensor) is approximately in the center of the sampling container. Measurements are carried out with a continuous flow of water into the container. The measurement result is recorded after the establishment of stable MI readings, but not more than 10 minutes later. after the start of sampling. At the same time, Rules No. 307 and No. 354 say: Uninterrupted round-the-clock hot water supply throughout the year. Uninterrupted - continuous without preliminary drains. I was mistaken, the measurement was carried out at a water drain rate above 2 liters per minute.

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Such amenities as heat, gas, electricity and water are perceived by us as part of the usual comfort of a city dweller. It is especially difficult for us without hot water, which is sometimes planned to be turned off.

But what if hot water can only be called that because it comes from the corresponding tap. In fact, it is slightly warm, but not hot at all. Let's look at the standards and find out what temperature it should be.

Hot water temperature standard according to SNiP

Temperature regime of hot water supplied to water supply systems apartment building, are established by the Sanitary and Epidemiological Service, SNIPs and GOSTs.

SanPiN Resolution 2.1.4.2496-09 lists the following hot water standards:

• at least 60 degrees in the open heating system;
• at least 50 degrees in a closed heating system;
• not higher than 75 degrees, regardless of the system.

The lower threshold is set in a range that allows you to protect water from pathogenic bacteria. If the upper limit (75 degrees) is exceeded for any reason, it may cause damage plastic system water supply. Such systems are now in every modern house.

The temperature of hot water from the tap should not be lower than 60 0 С and not higher than 75 0 С

It is worth noting that in the legislation you can find permissible deviations in the temperature of hot water. They should not be more than:

• three degrees in the daytime;
• five degrees at night.

If the deviations are greater than the specified values, consumers have the right to demand a reduction in fees. When the water in the hot tap does not reach 40 degrees in temperature, its cost should be calculated according to the standard, as for cold water supply.

How to measure the temperature of hot water in the faucet

Before making a complaint and demanding measurements, you can independently check the temperature of the water from the hot tap. To do this, you must first open the tap and let the water flow for two to three minutes. This is necessary so that the water in the water supply system takes a constant temperature. Then it is collected in a container where the thermometer is immersed. You can use the usual device for water.

After the temperature on the thermometer becomes constant, write it down and take a series of measurements at other times of the day. When, during all the measurements made, the instrument column shows the temperature below the standard, you should contact the management company.

What to do if the DHW supply is not up to standard

Reporting a discrepancy between the water temperature and the specified standards based on the results of the measurements made is mandatory, since you pay for the resource and have the right to demand compliance with the standards. The management company must accept applications both in writing and by telephone.

All actions aimed at finding out the causes of violations must be recorded by the dispatcher. He, in turn, is obliged to notify the applicant about the work being done on the water supply line. In the absence of problems on the water supply line, a representative of the management company (UK) is obliged to come to the address indicated in the application and take measurements. The estimated exit time is set within two hours, unless otherwise agreed with the applicant.

In the process of taking measurements in the presence of a representative of the Criminal Code, all thermometer readings are recorded in an act. This document must be completed. It is on its basis that you can demand the recalculation of fees for hot water supply. Two copies are made: one for the applicant, the second - in the Criminal Code.

If the temperature regime is violated regularly and repeatedly, the consumer has the right to contact the utility service with a complaint. It will certainly be considered, but it is important to draw up the document correctly and argue the problem as clearly as possible.

Main points of complaint:

1. In the header, in addition to the organization and official to whom it is addressed, it is necessary to indicate your data: full name, full address of registration, phone number for contact.
2. The text should contain all the information about the problem, indicating the measurements made. Data is taken from the act drawn up jointly with the representative of the Criminal Code. Be sure to indicate the date when the measurements were taken, the temperature according to the readings of the device and the data of the representative. Here you can also specify the dates of appeals and visits on this issue.
3. At the end, the complaint contains requirements to eliminate the causes of deviations from the standards.
4. The complaint is sealed with the signature of the person concerned and the date of its preparation.

The complaint can be made in printed form or by hand in two copies. One of them is transferred to the management company. At the same time, during a personal visit, you can be required to register it in the presence of the applicant and put the incoming number on the second copy, which remains in the hands of the applicant.

Sample application for measuring the temperature of hot water —

The term for consideration of a complaint is set at 30 days, although management companies often do not written appeals react much faster. The speed of solving the problem can be affected by a collective complaint if there are several dissatisfied with the quality of the water.

In case of inaction of the Criminal Code, one should contact the state supervision structures - Rospotrebnadzor and the prosecutor's office.

State sanitary and epidemiological regulation
Russian Federation

Hot water temperature measurement
centralized
hot water supply

Guidelines

MUK 4.3.2900-11

Moscow 2011

1. FBUZ “Federal Center for Hygiene and Epidemiology” of Rospotrebnadzor was developed (V.G. Sennikova, A.V. Sterlikov, Yu.V. Tyulpanova, E.S. Shalnova); FBUZ "Center for Hygiene and Epidemiology in the Republic of Tatarstan" (S.V. Kiyashko); FBUZ "Center for Hygiene and Epidemiology in the Tula Region" (V.A. Shcheglova); FBUZ "Center for Hygiene and Epidemiology in the Altai Territory" (T.V. Kharlamova, N.S. Kovaleva, N.A. Sukhoruchkina, L.A. Mishagina).

2. Recommended for approval by the Commission on State Sanitary and Epidemiological Rationing under the Federal Service for Supervision of Consumer Rights Protection and Human Welfare (Minutes No. 1 dated June 2, 2011).

3. Approved by the Head of the Federal Service for Supervision of Consumer Rights Protection and Human Welfare, Chief State Sanitary Doctor of the Russian Federation on 07/12/2011.

4. Entered into force on 07/12/2011.

4.3. CONTROL METHODS. PHYSICAL FACTORS

Temperature measurement of hot water systems
centralized hot water supply

Guidelines

MUK 4.3.2900-11

1. General provisions and scope

1.1. The sanitary and epidemiological requirements for ensuring the safety of water in centralized hot water supply systems include the prevention of contamination of hot water with highly contagious infectious agents viral and bacterial origin, which can multiply at temperatures below 60 ° C (including Legionella Pneumophila), as well as the prevention of diseases of the skin and subcutaneous tissue due to the quality of hot water.

1.2. In accordance with the hygienic requirements for ensuring the safety of hot water supply systems, the temperature of hot water at the points of water intake, regardless of the heat supply system used, must be at least 60 ° C and not higher than 75 ° C.

1.3. These guidelines establish a method for measuring the temperature of hot water in centralized hot water supply systems used in the control (supervision) of compliance with the requirements of SanPiN 2.1.4.2496-09 * “Hygienic requirements for ensuring the safety of hot water supply systems. Amendment to SanPiN 2.1.4.1074-01 "(hereinafter - SanPiN 2.1.4.2496-09).

* Approved by the Decree of the Chief State Sanitary Doctor of the Russian Federation dated April 7, 2009 No. 20, registered by the Ministry of Justice of Russia on May 5, 2009, registration number 13891.

3.3. When carrying out measurements, the flask (reservoir for sampling) is placed on a stand with a tray. The flow of sampled water is directed to the collection tank. Measurements can be taken using a washbasin, bathtub, etc. as a tray.

4. Safety requirements for measurements

When sampling hot water and making measurements, use personal protection, preventing hot water from entering exposed parts of the body.

5. Qualification requirements for operators

Only trained specialists with experience in this field of activity are allowed to perform measurements and process results.

6. Measurement conditions

Sampling and temperature measurement of hot water should be carried out indoors at an air temperature of 20 - 35 °C, humidity 30 - 80% and atmospheric pressure 84 - 106.7 kPa.

7. Sampling and measurements

7.1. Sampling for the purpose of conducting research for the purposes of state sanitary and epidemiological supervision, production control is carried out in accordance with the requirements of SanPiN 2.1.4.2496-09 in places of water intake.

7.2. At least 4 points are selected for water withdrawal: 2 are closest to the hot water network input to the object (building) and 2 are the most distant from it. The choice of points is carried out according to the technical documentation for the object where control measurements are made.

7.3. Hot water temperature measurements are carried out in warm and cold period year at an outside air temperature that differs by no more than 5 ° C from the average temperature of the warmest summer month and the average temperature of the coldest winter month of the year. Complaint measurements can be carried out in all weather conditions.

7.4. For the purpose of production control, it is possible to carry out additional measurements at various stages of water preparation in the hot water supply system.

7.5. Before sampling hot water, the water should be drained until a constant temperature is established. The time for draining water can be up to 10 minutes, depending on the state of the distribution network and the mode of hot water consumption by the consumer. When sampling at the point where hot water is supplied to the distribution network, the water is not drained. Sampling is carried out in a container that meets the requirements of the paragraph of these guidelines, with a continuous flow of water. The water flow should be at least 2 liters per minute (determined by the time of filling the measuring container). During sampling and measurements, excess water is poured over the edge of the sampling container into the tray, and from it is removed into the sewer.

7.6. To measure the temperature of the sampled hot water, the thermometer is immersed in the water under test in such a way that the thermometer ball (or SI sensor) is approximately in the center of the sampling container. Measurements are carried out with a continuous flow of water into the container. The measurement result is recorded after the establishment of stable MI readings, but not more than 10 minutes after the start of sampling.

8. Processing and presentation of analysis results

The measurements carried out are direct measurements with a single observation. The measurement results are presented in the form:

X±U(P= 0.95), where

X -measured temperature value;

U- expanded uncertainty of the measurement result, calculated in accordance with the recommendations for metrology