Features of connecting the house to the central water supply

Connecting a private house to a central water supply (CV) is the most economical and convenient way to organize housing water supply. The only drawback of this option is the need to obtain a number of documents and permits, since unauthorized tapping into the central water supply is illegal.

In this article, we will consider the procedure for arranging the central water supply of a house, cottage or cottage. The necessary documents will also be considered and recommendations will be given on how to do all the work with your own hands.

1 What you need to know before connecting to a CV?

Among the advantages of connecting a private house to a central water supply, we highlight a serious reduction in the cost of organizing and operating water supply - the construction of a well or a well will not only cost more at the stage of their development, but will also be accompanied by the cost of repairing and cleaning such sources in the future.

Also, the city water utility provides a constant water quality - this statement is not fully true for all regions, however, if there are no problems with this in your area, then the only thing that will be needed to purify the water is an ordinary table filter.

Connecting to the water supply system is quite simple. You only need to collect the necessary technical acts and permits, after which a pipe is diverted from the central water supply to the house, which is laid below the level of soil freezing.

If the water pressure provided by the water utility suits you, you won’t even need to install a booster pump. An additional advantage will be the ability to connect to the central sewer, which is necessary for the discharge of domestic wastewater. If this is not possible, the work on arranging the sewerage will need to be done by hand.

However, there are often situations when connecting to a centralized water supply is problematic. The key factor is the outdated water utility, which is designed for a small number of users and is not able to provide sufficient water pressure. In cases where a thin stream of water flows from the tap, you can forget about the normal operation of the column, boilers, washing machines and other equipment.

You can increase the pressure by installing a special pump, which is mounted on a pipe and automatically turns on when water consumption points are operating. Keep in mind that when arranging an autonomous water supply for a private house from a well or a well, a pump will be required in any case.

Another problem of the central water supply can be low-quality water, which is not properly treated in public utilities. The other side of the coin is water, excessively chlorinated water. Here you will need a good filter, or an integrated water treatment system.

1.1 Required documents and connection procedure

To bring the central water supply to the house or cottage, you will need to collect the following documents:

• act of work on laying the pipeline;
• act for hydraulic testing of the system;
• the act of washing and sanitary cleaning of the water supply;
• help for installing the meter.

Direct work on bringing water into the house is carried out by specialists from the water utility or a licensed organization, but if, for any reason, you do everything yourself, you will additionally need to obtain acts for hidden work on extracting, backfilling the trench and adding sand.

Consider the sequence of actions when connecting:

1. We turn to the "Land Registration Center" in order to obtain a plan for private home ownership (scale 500 to 1). It is important that it indicates the location of all underground utilities on the site.
2. Having a plan in hand, we go to the district water utility and submit the appropriate application, in a month you will receive the technical conditions for connection, which indicate the tie-in point, pipe diameter and similar nuances.
3. With the technical conditions and documentation for a private house, we turn to the SES, where we get a conclusion on the legality of connecting to water supply networks.
4. We bring the technical specifications to the design organization, where they make the project for us (if such services are available in the city water utility, the project can be ordered from them). The resulting project must be registered with the SES.

The red tape with the documents ends here, it remains to contact the water utility and get a list of licensed organizations that can be engaged in laying and connecting the water supply. Installation of metering devices and their commissioning is carried out directly by the specialists of the water utility.

1.2 Features of connecting a house to a CV (video)

2 Works on laying and connecting the water supply

If you have the appropriate permission, then all installation work can be done by hand. The central water supply is a pipe with a diameter of 100-500 mm, which can be connected in two ways:

• welding method;
• use of clamp.

When using the welding method, the nearest shut-off valves are closed in the section of the central pipeline, after which a hole of the diameter specified in the project is cut out on the pipe, to which the thread (coupling) is welded. A full-bore crane is mounted on the coupling and a supply pipe is drawn from it to the house.

On obsolete central networks, shut-off valves may be missing or in a faulty condition, which leads to the need for tapping under pressure. It is possible to independently drill a pipeline through which water circulates only at a pressure of the working medium up to 4-5 atm.

Insertion with the use of overhead clamps is carried out when connected to pipelines made of polymeric materials - polypropylene and polyethylene pipes. To do this, the water is blocked and on the pipe, in the place where the hole will be drilled, a rubber or silicone expander is placed. Next, a clamp is applied and fixed (tightened with bolts), to which the thread is welded, a crane is mounted and a pipe is connected. In addition to the screed, it is desirable to fix the clamp with special epoxy adhesives that prevent its displacement during the thermal expansion of the pipe.

2.1 Installation of water supply inside the house

After the house has been supplied with water, it is necessary to draw up a scheme for distributing water pipes inside the building. When choosing a scheme, the following factors should be considered:

• number of points of water consumption;
• the presence of filters that lower the circulation pressure;
• the number of points of water consumption and the distance between them;
• the total length of the internal water supply.

In practice, two schemes are most often used - sequential (tee) and collector. The collector scheme shown in the image is suitable for small houses. It lies in the fact that one pipe is diverted from the water intake point, to which all water consumption points are connected. Its disadvantages are a decrease in the circulation pressure at the end of the circuit, however, this problem can be solved by installing a circulation pump.

The collector scheme is suitable for houses of any size, as it involves the installation of a collector at the water intake point, from which individual pipes are bred to each water consumption point. A shut-off valve must be installed for each section of the collector so that, if necessary, it is possible to shut off the water supply to the emergency section.

For distributing water supply inside the house, it is best to use polymer or metal-plastic pipes - this is a relatively cheap and durable option that surpasses steel counterparts in all performance characteristics. Connecting a shower cabin to the water supply, as well as columns and boilers, is rationally performed using elastic plastic corrugated pipes.

If the pipes of cold and hot water supply run in parallel, then the cold one should always be lower, so condensation will not form on it. The most common mistakes in the installation of internal water supply are:

• passing all pipes through one hole in the wall, with non-compliance with the minimum allowable distance between them;
• neglect of the installation of valves in front of plumbing fixtures;
• lack of thermal insulation of hot water pipes when they are placed in walls or an unheated underground.

And do not forget that according to the unspoken rule, hot water should be connected to the faucets on the right, and cold water on the left!