There are a number of compelling reasons for replacing a gas hose, including a banal sleeve wear. According to the technical standards for the performance of this work it is necessary to call a gas service worker. But what to do if the need arose in a country house, for example, where it is not possible to hope for the operational arrival of gas workers? Act independently!
However, you must first understand the technological nuances according to which this work is performed. We will tell you how to change the gas hose with your own hands. Using the information, you can competently remove the old sleeve and install a new one without fear for the safety of the family and neighbors.
We have described in detail all types of hoses approved for use in gas facilities. As an example, the process of installing a new gas stove with a full set of equipment is given. The information submitted for consideration will also be useful to those who decide to independently perform the replacement, and to customers of gas industry services.
The content of the article:
Types and features of gas hoses
- Features of rubber sleeves
- Characteristics of rubber products
- Specificity of reinforced liner
- Reliability of bellows metal connection
- Gas hose selection rules
- Connection Security Basics
- Connection diagram of the gas stove
Instructions for self-connection
- Step # 1: Dismantle the old slab
- Step # 2: Performing a Crane Replacement
- Step # 3: Connect the flexible hose to the plate
- Things to know: valuable advice
- Conclusions and useful video on the topic
Types and features of gas hoses
After purchasing a new gas stove or replacing old equipment, you will need to change the flexible hose. Only five types of these communication devices can be found on sale, but they are not popular.
The reasons for the low level of demand for certain types of gas hoses lie in the complexity of installation work. And in some cases, it will not be possible to do without calling a specialist.
The most popular flexible models include such linings:
- rubber, reinforced with metal threads;
- metal bellows.
In addition to flexible models, you can find steel and copper pipes. Requirements for connecting this type of sleeves are very different in comparison with flexible models.
Differ and methods copper pipe soldering. If the installation is made by the method of brazing solder, it is necessary to use exclusively the copper-phosphorus contacts PMFS6-0.15 and PMFOCr6-4-0.03. Soft soldering in this case is not allowed.
When installed by the method of hard solder, one of the important conditions is the exposure of the temperature regime, not exceeding the mark of 600 ° C. For soft soldering this range is reduced - no more than 400 ° C
Another way to contact gas pipes is to install by pressing the copper fittings. Compression fittings for sleeves are selected based on the pressure ratio of the pipe. If the pipe diameter is not more than 54 mm, they allow the use of a fitting-free connection method.
On the fittings for the compression of the gas hose, most often, you can find yellow markings. In some cases, only the seal ring is colored yellow. It should be borne in mind that the use of shortened fittings is strictly prohibited
Despite the reliability of connecting such hoses to gas appliancesThey have several disadvantages:
- it will not be possible to install without special equipment, so you will need to call a specialist;
- the placement of the plate will be stationary, without the ability to move
- labor-intensive installation process.
Such methods are used infrequently and are considered to be unnecessarily expensive. Financial investments will be many times higher than when using popular flexible hoses. And also it is necessary to take into account the duration of the work - at this time there will be no access to gas supply.
Features of rubber sleeves
A rubber hose, designed primarily for transporting oxygen, is considered a rare option, although it can be easily found on the market. He has a lot of advantages: a pressure of 20 atmospheres, an affordable price, easy installation and good electrical insulation.
However, despite all the positive qualities, the device requires special vigilance during operation. Contact of the surface of the sleeve in contact with air and the slightest drop of oil can lead to overheating of the hose, and accordingly, a quick failure.
The use of a rubber hose as an accompanying gas equipment is the misuse of this type of hose. Despite its positive characteristics, it needs careful and constant inspection during operation.
It is worth refusing to use the oxygen hose - it is considered a relic of the past, when there were no more sophisticated and safe products. Particularly dangerous is its installation in the kitchen of an apartment in a multi-storey building - the owner risks not only his life, but also hundreds of unsuspecting people.
If in the country, i.e. the place of temporary residence, such a product is used, you need to be especially careful and pay attention on its label, where the following parameters should be indicated: product class, internal diameter, maximum allowable pressure.
Visual inspection of defects in the form of blistering, cracks and punctures of the fiber frame will also be required - the presence of bare spots is not allowed.
Characteristics of rubber products
A good recommendation earned rubber-hose. It is ease of use, inexpensive price, high flexibility, rich size range (almost any length and diameter), excellent electrical insulation.
The disadvantages include the weak rigidity of the material - the product is made from rubber, reinforced with fabric threads. Despite this, modern technologies used to make the model will help to serve up to 10 years.
Rubber fabric gas hose is the cheapest of all the options of components. Due to the extensive size range it is possible to choose the required dimensions of the sleeve.
Another negative quality - after a short period of time in the rubber cracks appear, which are the conductors of gas leakage. Despite good strength indicators, experts do not recommend using such a hose for more than two years. This type of eyeliner is in demand for gas bottles in a private house.
Specificity of reinforced liner
The type of product reinforced with metal mesh has much in common with water pipes - thin-wire steel braid gives structural strength. Two fittings and threaded rivets located at the ends of the sleeves serve as fasteners for the hose and gas stove.
The clear advantage of this type of connection is reliability. And in order to ensure its safety, one should put dielectric inserts between the hose and the plate. In addition, when installing, be sure to use gaskets made of copper, aluminum or other soft metals.
Today, manufacturers produce reinforced hoses with fittings made from an alloy of iron and carbon or brass. It is necessary to give preference to these materials, excluding stainless steel
The reinforced sleeves are inexpensive and easy to use. The flexibility of rubber and the strength of the metal successfully combined in this product, which increased its popularity for use in the domestic environment. Experts in our country recommend gradually abandoning their operation in favor of a more advanced version.
Reliability of bellows metal connection
The most reliable and durable option - bellows metal hose. It is used to connect the stove to the gas line, has a high coefficient of flexibility, which is achieved due to corrugations made of stainless steel.
At the same time at the moment of bending, there is no deformation of the internal section of the sleeve. The hose can be extended up to four times the size. All this is reflected in its price range - the cost of the product is quite high.
The service life of the metal bellows is 25 years. When mounted on a stove with electric firing, electric grill and lighting, a dielectric insulating gasket is required between the sleeve and the gas tap
The standard length of this type of hose is 1.5-2 m, the thread diameter is ½ or inch. Due to the method of fixing, there are hoses with fastening “nut-nut” and “nut-choke”. In addition to the well-bending surface, they are able to withstand a pressure of 6 atmospheres, and can also come into contact with temperatures from - 50 to +200 ° C.
The only drawback is the price category, which is five times more than its competitors.
Flexible bellows gas hoses are equipped from the outside with a protective polymeric sheath that protects the sleeve from corrosion and prevents damage
Flexible bellows sleeves are divided into conventional and with a metal base of stainless steel. The latter are protected by a two-layer polymer coating, providing high-quality electrical protection. It protects the material from corrosive and acidic effects, as well as from the high-temperature mode of the furnace device.
The material of this type of gas supply is stainless steel, which meets all the technical requirements of GOST. Due to the polymer coating product is protected from the action of various forces.
The sleeve ensures the integrity of the gas supply system for a long term - up to 25 years. The electrical resistance of the material reaches 1500 V, which is important, because modern plates are equipped with rich electrical functionality.
Bellows hose has a polymer coating to provide electrical insulation of a gas stove, equipped with electrical functions: ignition, lighting, grill
Gas hose selection rules
Any equipment, including liners for appliances on blue fuel, must have a quality certificate guaranteeing the specified period of operation.
Acquire this kind of product is necessary only in specialized stores. Do not forget about the differences between the water hose and the gas hose: the yellow mark on the sheath indicates that there is a hose for gas supply in front of you, a blue-red one for a water supply system.
Details about hose selection to connect gas equipment, it is written here. We recommend to read the article proposed by us.
Connection Security Basics
Any gas equipment, including related equipment, must be connected in accordance with safety regulations. Gas is an explosive substance, when working with which it is worth being as careful as possible.
This requirement also applies to devices for his eyeliner, which must be of high quality and provide an appropriate level of protection:
- The gas hose is not recommended to hide, it is important to provide access to it.
- The product is not subject to staining.
- At installation it is worth paying attention to a tension of a sleeve - it has to sag a little.
- During the installation process it is impossible to bend too much and twist the liner.
- Metal parts of the product must be protected from condensation.
For the installation of a flexible hose used only tools, materials and components designed to work with gas equipment. This should pay special attention, because many of the details are almost identical to materials for plumbing.
Connection diagram of the gas stove
Schematically gas plate connection looks as follows: through the kitchen room there passes a gas riser, from which the branch pipe with a tap at the end, joins the stove. This piece is also called lowering or retraction.
In old houses, a petal-type crane is installed on the lower slots. When reconnecting, it is recommended to replace it with a ball. It takes up less space and is more convenient to use.
The rubber-fabric hose is screwed into the faucet, through which the gas is supplied. For old houses, landing on a metal pipe is typical. This method is not appropriate to apply, because in this case the location of the device will be stationary.
In remote areas of the private sector, where there is no access to a laid gas pipeline, bottled gas is used. To connect to such equipment is allowed only a specialist gas service.
Instructions for self-connection
Paying gasman services for installation work is not too high, but many home craftsmen prefer to do everything on their own. This is a feasible occupation, requiring the purchase of components and theoretical knowledge.
And to connect you will need to prepare the following tools and buy materials:
- keys: gas number 1, adjustable 22-24;
- screwdriver for tightening the clamp if required;
- seals (thread elbow 55, flax, FUM - tape);
- ½ gasket;
- gas hose;
- ball valve 1/2 ′;
- brush and soap solution, which will be required to control the execution of works.
And also useful rags and plastic tube. A rag will be used as a temporary block from gas leakage. The tapered edge of the cork must be adjusted to the opening of the supply pipe. If, during the extraction process, a homemade part gets stuck, it can be easily removed with a corkscrew.
Step # 1: Dismantle the old slab
Shutting down the crane is a top priority to ensure the safety of work performed. Next, you need to unscrew the lock nut located on the outlet and remove the clutch. If the old plate has a sleeve and lock nut that were previously painted, this will make it much more difficult to dismantle them.
Sometimes it is not possible to perform this procedure, then you will need to trim the eyeliner with a grinder.
Dismantling the gas stove is made after disconnection from the conductor pipe of the gas main. Difficulties with loosening the lock nut on the metal pipe are solved by trimming the liner
In the process of unscrewing the sgon, located in the lowering valve, it is necessary to hold the cock itself with a key. It will not have to be removed if not planned. crane replacement. When it is planned to postpone the installation of the slab, an additional plug is installed on the bottom.
Step # 2: Performing a Crane Replacement
There are situations when the wall is located in the extreme vicinity of the crane and there is no possibility to dismantle it. In this case, you need to bend the mount and install a wedge between the wall and the pipeline. However, this is done so that there is an opportunity to continue to perform work.
It is necessary to prepare a piece of rags, sufficient to completely overlap the pipe after dismantling the old crane. The next will be his rip off without full unwinding. And also need to prepare the selected type of seal. Do not forget in the process of working carefully ventilate the room to eliminate gas vapors.
After unscrewing the tap, the exit from the pipe is tightly fixed with a finger, and then with a wet cloth. The main actions are aimed at the maximum elimination of gas from the pipe. In this case, the thread on the branch should not be closed, since it will be covered by the chosen sealant.
Before winding the seal, the thread on the bottom must be thoroughly cleaned. Further, it is carried out directly by its winding. This process ensures reliable and tight fixation of the new faucet, which then tightly twists. The last action is to install the previously removed handle on the faucet.
With the help of soap suds, the tightness of the tap and gas pipe connection is monitored. If the work was done correctly, the installation of the gas hose can continue
If the gas equipment is connected to the main line for the first time, you will need to call the gas-gas-maker. In his presence, a control check of the equipment is performed for gas leaks when the valve is open. In the event that the gas service worker did not find any violations, he must enter into the register an established brand of stove.
Step # 3: Connect the flexible hose to the plate
The outer thread of the hose fitting is wrapped with a seal. After that, it must be screwed into the tap on the branch pipe. The connection of the flexible hose to the collector is carried out at the finishing stage.
Next, be sure to stage the test opening tap on the bottom for gas leakage. Using soap suds, the docking spots are processed with a brush. If foaming occurs when opening the gas tap, the work must be redone.
It is necessary to check the thread located on the plate collector. Quite often it is 3/8 ′. In this case, you will need to install the adapter on 1/2 ′, with a seal.
If the gas hose replacement work is done in a private house where bottled gas is used, an additional replacement of the nozzle with a smaller diameter will be required. If this is not done, the burners will release too much soot that likes to settle on furniture and dishes in the kitchen.
Things to know: valuable advice
Before acquiring a flexible hose, it is necessary to verify the dimension of the thread at the outlet near the plate, its classification and belonging to a straight or angular type. If the output is direct type (directed into the wall), you must purchase a sleeve with a square at the end.
Gas hose can not be painted - it will accelerate its cracking. A more attractive look can be created by pasting with special paper or oilcloth.
And it is also strictly forbidden to tightly sew gas communications with false panels made of plasterboard and other structures - this will make it difficult to carry out service work with individual elements.
For camouflage gas supply systems use collapsible boxwhich is easily dismantled if necessary. In this case, to all structural elements of the gas system will be constant access.
It is forbidden to use extra connections. Independent complication of the gas structure, according to the technical regulations, may entail the imposition of a fine or disconnection from the gas supply
If to connect gas water heater or the slab was called by the master, it is necessary to check the correctness of the work: the excess removal from the tap on the lowering should be loosened, The flexible connection is directly connected exclusively to the tap located on the branch pipe, and the other end is connected only to the gas outlet. slabs.
And also allowed the use of the adapter. Any additional installation is prohibited.
Conclusions and useful video on the topic
Video recommendations on the choice and rules of operation of gas hoses:
About connecting the gas stove in the video:
Video with installation guidelines for purchased hoses:
The correct connection of the gas stove, in accordance with the necessary technical standards, is subject to mandatory verification by the gas control service, especially if the stove is new and this is done first.
If a person has never experienced this kind of work, and the knowledge is extremely superficial, the best option would be to contact a specialist.
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