Detachable connection with union nut American drawings. Using an American connection in plumbing

The quick-release threaded American is available with a flat or conical connection of structural parts. Usually, the simplest American consists of four parts: two threaded fittings, a gasket (but not always) and a union nut.
Tightness between fittings occurs due to the conical surfaces of the edges of the parts and a rubber gasket, or for flat ones - only a gasket, for example, paronite.

Americans are designed for convenient quick connection or disconnection of pipes and various shut-off and control elements of heating and plumbing systems in the house. Connection (connector) of pipelines is carried out due to only one union nut. Please note that the American detachable connection in plumbing is designed for repeated use with the replacement, if necessary, of the “squeezed out” gasket and has an undeniable advantage over the usual squeegee with a coupling and a lock nut.
Such connections come with a socket threaded connection (Photo 1)

or for soldering polypropylene pipes (Photo 4).

Americans for plumbing are made from different materials: cast iron (Photo 3),

brass plated with chrome or nickel (and without),

stainless steel and combined, with individual polypropylene parts. They can be bought in the distribution network of various sizes (diameters) and designs (straight, angular (Photo 2),

designed for different pressures of the medium in the pipeline.

Widespread cranes with an American.

By design, an American ball valve can be straight or angled and is designed to work in a system of cold and hot non-aggressive environments.

Available in bore sizes 15 (1/2″), 20 (3/4″) … and up to 50 (2″). The temperature limit for a plastic tap is plus 90 degrees. And a ball valve with an American made of brass, for example, Bugatti (Bugatti) can withstand temperature conditions, according to the manufacturer, from minus 20 to plus 120 degrees.

In order to install or dismantle plug-in connections, you need a wrench for American women. In plumbing practice, more often you have to deal with American women 1/2 ″ and 3/4 ″, with two internal protrusions, less often for a hexagon. I make such a “L” shaped double-sided key myself, from cutting construction profile 14 fittings, using the method of heating and flattening to a square. Then I give a small conical shape and harden. It is made under a cone because different manufacturers have slightly different sizes of internal protrusions.

The universal mutual “L” shaped key for American women has the following approximate dimensions (diagram in Fig 1):

handle length 150 mm;
edge under 1/2 "- A \u003d 12, B \u003d 10, C \u003d 32;
edge under 3/4″ - A = 16, B = 13, C = 35

Such a homemade key is also suitable for detachable connections for a hexagon.

Tip: if you only need to work with one or two ... 1/2 ″ metal American women, you can use ordinary pliers, which will work quite well as a key (Photo 5).

This is the name of the type of threaded connection of pipes in water supply and hot water systems. With the appearance on the market, the American quickly gained popularity among plumbing professionals due to the ease of installation and the reliability of joining pipeline elements.

If you need to connect pipes - an American is ideal. Indeed, later, when performing repair work, there is no need to dismantle part of the network.

It is impossible to assemble a pipeline from a single pipe. It is necessary to perform rotations and connections of pipeline elements in order to obtain the desired configuration. Fittings have always been used to make joints.

You can also install using a coupling, which in the standard version is a threaded part. When connected, it is screwed onto the threaded part.

The next part is rotated into the clutch and such an operation (especially if all the elements are large) is quite a noticeable inconvenience.

What is an American

threaded fittings - are attached to one part of the water pipe at the connector point;
reciprocal branch pipe with a shoulder - is installed on the second end;
union nut - is installed on a fitting with a flange before it is installed in its location.

Further, when tightening the nut with pressure on the shoulder, the fittings are tightened one to one and these two parts are compressed. Gaskets are used to ensure the tightness of the docking with the help of a coupling. And with a conical joint, it is not required.

If it is necessary to dismantle the section docked by means of an American, it is enough to unscrew the nut, while the mating elements of the pipeline remain motionless.

Types of docking nodes. The number of design solutions for installation corresponds to the number of varieties of molded products.

By type of materials used

It provides for the use of homogeneous elements, primarily in order to avoid electrolytic corrosion, therefore fittings are produced in various designs:

. The life cycle of such parts is also limited by the tendency to form lime deposits from water on internal surfaces.
Copper- less susceptible to corrosion, they are used only on pipelines made of the same material.
brass- the most popular in application, resistant to oxidation, durability is at least 50 years.
Polypropylene- in terms of strength characteristics and ease of use, they are increasingly competing with metal products.
Polymer– have all the advantages of plastic products. For polypropylene pipes - American is the best type of connection.
Combined- are used as adapters when joining pipes made of metal with plastic ones during partial replacement of the pipeline. To make such fittings, a threaded metal part is pressed into a plastic body.

By type of assembly method

In addition to differences in the materials of manufacture, the threaded connection differs in the design of the docking units.

They are threaded, with different threading directions, having internal or external threads on the sides. Samples with a conical joint are also used, with the help of which an American connection is made using a persistent compression ring under the nut.

Video

Such a variety of fittings creates certain difficulties in choosing them for an inexperienced person, but it gives real pleasure to professional performers.

Surface protection method

What are American women by type of protective coating? Steel and cast iron products are coated with a protective nickel or zinc coating to protect against corrosion.

For plastic or stainless analogues, protection is not applied. In this regard, it is recommended to use linings for pipe wrenches or special wrenches with internal engagement of the part.

Docking metal components

Pipelines for various purposes made of metal are still widely used in plumbing. Therefore, the installation of metal pipes is widely used in a variety of options.

For simple joining, threads must be cut at the ends of the elements to be assembled using a standard threading tool. The American is screwed onto the prepared ends, while it is necessary to seal the threads by winding the FUM tape or strands of flax fiber.

The final connection is made by tightening the nut and installing the gasket. If the connector is reused, the gasket must be replaced. The joint is reliable and maintainable. What are Americans for metal components:

direct connection of metal pipes;
installation made at right angles, as well as angles of 30 and 45 degrees;
installation of cantilever water supply elements with a pipe, such as taps, mixers, air vents;
threaded connection to change to a different diameter;

American allows you to get a sealed joint in pipelines of any configuration.

Docking of plastic components

The connection of the components of pipelines made of composite materials has its own characteristics. Docking of polypropylene pipes is carried out by welding with special equipment. The process is very simple and is carried out on site during the installation process.

Video

Designs are widely used where docking with a polypropylene pipe is made on conical American women, where devices with a sealing ring are used.

The connection of polypropylene pipe-rolls with an American is the most reliable and almost the only way of docking using a detachable coupling, including connecting a heated towel rail.

Several types of connections are used for polypropylene pipes:

coupling with external thread;
coupling with internal thread;
device with simultaneous use of internal and external threads;
angular, produced with an angle of 30, 45 and 90 degrees for installation in hard-to-reach places.

Installing a towel dryer

The installation of such a device in the bathroom can serve as an example of using a threaded connection for inserting additional equipment. The heated towel rail is connected either to the heating system or to the hot water circuit.

Video

In the second case, you will have to use the services of the DEZ to turn off the DHW riser for several hours, in the first case, you will have to wait until the end of the heating season.

Work can be performed in the following order:

Install the dryer in its permanent location.
Make a tie-in into the DHW or heating riser with the installation of threaded fittings for inlet and outlet flows.
Install corners with ball valves on them.
Connect the heated towel rail through plastic pipes. The critical temperature for them is 95 degrees, in neither system such a temperature is applied.
On the upper register, install a valve to bleed air from the system, otherwise the air lock may prevent the circulation of the coolant.
Check for leaks in the dryer by opening the inlet and outlet ball valves. If there are leaks, you need to re-check the joints by applying additional seals on the threads. Linen tow, fluoroplastic sealing material (FUM) in the form of a tape or cord are suitable for this.
The installation of ball valves will allow for repair work without disconnecting the riser. It should be noted that the connection of a heated towel rail with a polypropylene pipe requires a careful attitude, since the clamping ring cannot always be reused due to its deformation.

Connecting the heated towel rail to the riser with a polypropylene pipe using conical American women allows you to avoid the use of pipe benders. This reduces the complexity of work and their adjustment in place.

An example of connecting a heated towel rail through a threaded connection is shown in the figure.

Coupling element dimensions

In domestic plumbing standards, American women are classified as "sleeve connections with a union nut."

Naturally, their size range corresponds to that on the molded elements of water pipes. What types there are depends on the method of docking to the main line or console element.

Video

So, when installing a faucet or faucet, as an element of plumbing, American women are used in sizes from 3/8 to ¾ inch with conical threads. This allows you to make a reliable installation in just a few turns of the nut.

For water pipes, they are used in the range of 10 - 50 mm, the maximum indicator is typical for connection with a heated towel rail.

To connect pipes made of polymers, special couplings are used - conical American women, on which the plastic sheath is literally pulled by the force of the screwed nut through the thrust ring, providing a tightness of the joint many times greater than the pressure in the system.

Pipe dimensions

For an American woman in plumbing, threads can be selected based on the data shown in Table 1.

When using plastic pipes, the properties of the material must be taken into account. such as elasticity, plasticity chemical resistance.

Video

Therefore, for polypropylene products, an American is practically the only connection method that provides high-quality docking. Applying them locally, it is possible to assemble a pipeline of any configuration with a high degree of reliability.

For installation by means of an American, its dimensions must be adequate to the pipes used. For cold and hot water networks, this is an inch or an inch and a quarter; for heating systems in a private house, it is better to use one and a half inch products.

When using plastic products for drip irrigation systems, it is sufficient to apply half-inch sizes.

It should be remembered that a temperature of 95 degrees is critical for polypropylene pipelines, this parameter must be controlled when connected to heaters. The temperature at the outlet of the device may be above the permissible limits.

When partially replacing the water pipe with a plastic one, the American is used as an adapter.

Video

When installing with American women with a protective coating, you need to use a special tool that does not damage the cladding layer.

When selecting components for the pipeline, it is necessary to take into account their location in terms of accessibility and functionality.

Conclusion

The invention of the method of connecting the elements of the pipeline "American" has become a revolutionary event in the field of installation of plumbing systems of any complexity. As a result, such a complex process has become accessible even to performers with minimal skills in this area.

Without a doubt, complete this type of connections and success to you!

Entries

Connecting everything in the world with everything in the world is the primary task of any design. What to connect is always there, but what to connect - it still needs to be chosen and selected. For well-known connectors such as nails, bolts, screws, there are no problems in terms of their application, but how to connect pipes made of metal, plastic, rubber hoses? Of course, there are enough options here too: coupling joints of various designs, a huge number of technologies, the use of new materials. But it is unlikely that when starting to equip your home, someone will leaf through the Encyclopedia of Plumbing.

The easiest, but not exactly the cheapest way, hire specialists and then - as God wills. The cheapest, which is also how to see, is the option to do the installation yourself, but for this “feat” you need to know, at a minimum, what a squeegee, a lock nut and ... but you never know what. But the main adviser, most often are those who have already gone through all this. They then claim that the most common, convenient and reliable connector today is the "American". To be precise, this is not a connector, but a class or group of connectors that have a common design approach.

Let's consider the usual union connection and its shortcomings. Let's say that you need to connect two sections of the conduit of straight pipes. One of them connects with its end to a water tap, and the other to a conduit. We connect them, as shown in the figure from left to right:

If performed initial installation system, everything is assembled without complications. But during operation, if you need to dismantle any part of this system, have to disassemble it completely - and these can be multi-meter sections of pipes, and the presence of corners, etc. The problem is that you need to twist the entire pipe - after all, it enters the coupling - which means you need to dismantle its connection from the very beginning.

It is for this case that a compound called "American" is used.

American ... in Russia she is a foreigner

In the biography of this exotic element of plumbing consumer goods, there is no beginning, just like the wheel, but it can be assumed that practical Americans had a hand in its name. In fact, an American is a clutch with cap nut. And the coupling is a little bit different, but with a persistent shoulder, and a nut with a mating part for this shoulder, and in general, almost everything is the same there, but not like that, but the result is simply wonderful - you can connect any two sections of the conduit, and at the same time rotate only one nut. Dismantling of a particular connection can be done any number of times without disassembly all other nodes, which means that the time to complete the work, their cost and maintainability are all at the highest level.

Here is only the most general constructive version of the American. Its classical definition contains a somewhat more extensive interpretation - quick release threaded nut, which contains two threaded fittings, a gasket and a union nut.

The design of this connection, depending on the place of application, can be straight or angular, and the threaded joints are flat (cylindrical) and conical. For flat joints gaskets polyurethane, rubber or paronite. The conical connection is especially good in terms of tightness, since it does not require gaskets and is more resistant to temperature changes and deviations of the axes of the connected sections.

Connecting an American to the highway does not represent no difficulty. Let's say that you have to connect a line of steel pipes.

The order of work is as follows:

first we prepare the ends of the pipes - we cut a thread of at least 7 turns at both ends;
we select a connection in which both fittings have an internal thread;
we wind the fitting with an external thread onto the thread of one pipe, and before that we wind the sealant onto the thread - flax, tow, energy flex;
we put on a union nut on a fitting with a shoulder, and wind it onto another pipe with a wound seal;
The last step is to connect the union nut to the threads of the mating fitting.

All. The connection has been made. If we compare with the above example of a coupling connection, then you can notice a significant difference - the entire installation of the American consisted in twisting parts wrench, and nothing more. The rest of the highway remained motionless.

The use of American in plumbing

The versatility of connections with the help of an American and their positive qualities during operation made her indispensable in many cases of installation work. Structurally, the American has many modifications for various applications, and sometimes even is constituent node some types of equipment: taps, measuring instruments, complex switching units in heat and water supply systems, etc.

In home plumbing, almost every apartment has a water meter installed. , and often more than one - his inputs and outputs are made using an American. Due to this, when dismantling the meter, in fact, there are no problems with the connecting pipes - only it is unscrewed cap nuts.

With the help of an American, it is very convenient to carry out assembly and repair work with heating radiators, valves, various filters. Reducing the repair time during operation is the main headache for both residents and plumbers - the biggest positive effect using this connector.

The fundamental opportunity to create on the basis of an American high-tight connections determined its widespread use in systems with high pressure and high temperature. But this connection has become most widespread during the installation of metal-plastic and plastic pipes. . At the same time, the material of the connected pairs of the pipeline does not matter at all: metal-metal, metal-plastic or plastic-plastic - for any of them there is a connector model. Particularly shocking plumbers of the old school is the adaptability of an American woman to connect metal-plastic pipes without any special training- just the pipe is inserted into the "cunning" union nut, which, when connected to the counterpart, compresses it with a conical ring.

For the installation of this foreigner, an open-end or adjustable wrench of the appropriate size is used. Because outside the American has a beautiful nickel plating, the use of pipe wrenches is not recommended, or the surface of the nut should be protected with a wooden or plastic pad.

Materials from which Americans are made

American women are made of cast iron, brass, steel or stainless steel. Of course, the material is determined and the price in the end. Depends on the material performance indicators products: type of pumped liquids, allowable temperature, pressure. The range of these products is huge and you can always choose for any need. Typically applied to the surface nickel plated- this is protection from the external environment, and a presentable appearance.

Recently, plastic pipelines have been increasingly used in plumbing, so the American has also become a “half-breed” - some fittings with a persistent shoulder are made of plastic. During installation, such a fitting is welded to the pipe, and the nut presses it to a colleague - a mating fitting, which is made of metal, and is screwed onto a steel pipe. But if the pipeline is plastic, then the fitting pressed into plastic which is welded to the pipe.

For all its simplicity and attractiveness the American woman has a secret that does not lie on the surface, but everyone involved in the installation should know it - do you know how to twist it? The fact is that the union nut is controlled by the usual wrench, but there are also press fittings for metal-plastic pipes, which must be screwed into the landing site with an internal key. And this can be either a hexagon, which is simpler, or a cylinder with samples for hooks, which is more difficult, but more reliable.

A coupling is the most widely used plumbing fitting in civil engineering, designed to connect separate parts of a pipeline. A detachable threaded type coupling allows you to assemble a whole branch from individual blanks, consisting of an almost monolithic pipe.

It is not surprising that couplings are now used almost everywhere. We will consider a variety of such products invented in the USA. An American coupling is subject to consideration - designed for pipe assembly. What is so convenient about it and why is it so popular? Now you will know.

Article content

Design Features Differences

The standard threaded coupling is intended for the assembly of pipes and pipelines. The impossibility of creating an efficient water supply or heating system from a single pipe. Yes, it can be bent and connected to other, large branches, but this will significantly complicate the work without providing serious advantages.

It is customary to assemble pipes using fittings. Coupling as a fitting - performs the simplest and most common task - fastens pipes together, forming straight or angled joints.

Threaded couplings are much more common than others, because they made it possible to collect full-fledged branches from individual pipes, but at the same time leave them in a modified state. If the branch needs to be somehow modernized, improved or simply disassembled, it is enough to unwind the coupling.

Problems with standard threaded connections enough. This and:

weak tightness;
high weight, the need to cut the return thread on the desired side of the pipe;
the need to rotate pipes, etc.

The main problem lies in the design of standard type threaded connections. The thread must be unscrewed in order to disassemble it. To do this, you need to rotate either the pipe or the fitting, which adds problems.

American as a coupling - it was conceived just in order to eliminate such shortcomings and give plumbers a convenient detail.

The American turned out to be a truly universal model of plumbing. Its design, unlike a conventional threaded coupling, is completely collapsible and consists of at least three parts.

Two of them are counter threaded ends that are screwed directly into the pipe cavity. They can have an external or internal thread, it all depends on the specific design. The third part is a union nut used to fasten the two previous ones.

The beauty of the whole design is in its conciseness. The detachable system allows you to connect fittings or ends on pipes by rotating a separate nut. No need to twist the pipes, the fitting itself, the body of the coupling. Just connect the parts of the coupling and tighten the nut until it stops.

Rubber gaskets are attached to the inner ends of the coupling parts. They are needed to improve the sealing of the connection.

Advantages and disadvantages

What are the specific advantages of an American type coupling and how it is useful when fastening pipes.

Main advantages:

American is easily installed on any type of pipe;
the ability to form transitions, corner joints, connect taps and any other plumbing;
high level of tightness;
market availability;
good quality and performance;
the idea with a union nut simplifies installation and dismantling;
a large selection of a wide variety of products for every taste and budget.

The advantages are traditionally considered ease of use and tightness. As we noted above, the standard connecting thread on a conventional coupling cannot boast of tightness or ease of installation. The American saves us from such problems when assembling pipes into a single structure.

As for the cons, the only thing that can somehow affect your decision is the price. An American is an order of magnitude more expensive than a conventional threaded coupling. However, compression joints also cost their customers more, so there is nothing unusual here.

Types and differences

How many types of pipes there are in modern plumbing, so many fittings are needed for them.

Any detachable connecting part must meet the pipe in several ways at once. Only in this case it will be fully usable. Such a requirement is quite logical.

One of the most important points here is the material. If, for example, polypropylene is used as a material for pipes, then it is stupid to screw steel fittings to it. Polypropylene is a polymeric material, so polypropylene should be the main mating fitting. The same is true for any metal products.

According to the material, Americans are divided into:

Steel.
Brass.
Copper.
Polypropylene.
Polymer.

A steel split coupling for pipes is the most famous way to assemble them into a single structure. Steel is moderately cheap, very functional and durable. If we forget about its susceptibility to corrosion, there would certainly be no competitors for it.

However, the situation is different. Clean steel without treatment in a few years will begin to show signs of destruction. Galvanized will last a dozen, stainless will probably withstand two, which, however, does not save us from the initial problem.

Sooner or later, the steel fitting will begin to rust and turn sour, then its path is only for remelting.

That is why now they are more willing to buy brass models. Brass is a metal from a special group. With characteristics similar to steel, it does not cause a reaction to moisture or time. Brass fittings, even after 50 years, will be in the same condition as before.

Copper samples are an expensive option for those who have the entire piping system assembled from copper. Copper is superior to steel and brass in every way, except for strength.

Polymer fittings and adapters

Polymers such as polypropylene are increasingly being used to assemble civil water systems.

This assembly is carried out gradually, not everyone has the money, time and desire to completely change the pipes in the house. Obviously, the collapsible system in this case is faced with a problem.

You need to somehow combine different materials with each other. For example, polypropylene and steel.

Polypropylene, as a polymer, does not cause a response in steel, however, it is impossible to simply take and screw a fitting into a steel pipe, the main production material of which was polypropylene. You can't weld them either.

To solve such problems, a detachable variety of American women, called adapters, is used.

An adapter is a fitting consisting of combined materials, intended for assembling pipes from different materials. A detachable American of this type, on the one hand, will be a steel end with a thread cut on it. On the other hand, it is filled with polypropylene.

It turns out a very convenient detail that allows you to assemble the pipes into a single branch without destroying their identity. Each end interacts with its own material, and the tightness is ensured by a gasket system together with a union nut.

An overview of the features of American women (video)

Differences in thread type

American women differ not only in terms of materials, but also in the very principles of design. They also differ in terms of specific solutions. For example, on different American women there may be different types and directions of thread.

There are samples with external threads, with internal threads, with combined components, where the thread for different parts of the American is different. This distribution slightly complicates the process of choosing a fitting for beginners, but greatly simplifies the work of professionals.

Its charm is the ability to choose an option that is ideal for your conditions. It doesn't matter what threads your pipe has and what that pipe is made of, you will find a working solution anyway.

In the event of the loss of one of the components, it will not be difficult to find a replacement for it.

In any plumbing work, the main indicator is the provision of a hermetic connection. For this, devices such as a fitting, nut, gasket, clamp can be used. But the most high-quality and effective means for a tight connection is American plumbing.

What is it? It is a special nut designed to connect pipes to each other.

An American is a kind of connection of parts in plumbing, invented in America, hence the name. Later, an American coupling and crane were developed.

Types of threaded connections and what an American connection is made of

The thread on an American can be conical or cylindrical. There may also be a difference in the types of fittings. The surface of the fitting can be conical or flat.

Benefits of a conical seal:

To achieve these advantages, precision in the manufacture of fittings is required. In a flat seal situation, this can be slightly neglected. Here they use a flat Teflon gasket-ring.

An American nut can be used more than once, only replacing the old gasket will be enough, which can help protect yourself from buying new plumbing.

For the manufacture of connections, stainless steel, brass, chromium, nickel, cast iron, a combination of metals can be used. The use of these materials can be separately and in an alloy. The most durable will be the design, made with stainless steel elements. However, experts prefer chrome parts, as an American from this material is characterized by a high level of quality and plasticity. In addition, the reinforced structure does not require the use of a gasket.

Metal and polypropylene in the design will provide high tightness.

The American connection can be made using a variety of stainless steel grades. These are mainly brands such as AISI304, AISI316, AISI321.

The marking includes dimensions (unit inch), steel grade and conditional pressure in PSI.

The outer coating of the American is nickel galvanized, which protects it from corrosive formations and helps to increase the resistance to mechanical wear. This coating is also a decorative finish.

Coupling american

A coupling is a type of fitting used when connecting two pipes or when transferring a pipe with one diameter to a pipe with another.

An American coupling is the same coupling, on one side it is tightly screwed or welded, and on the other it is a collapsible American connection.

Crane American

At the moment, the most successful and common element of valves is a ball valve. There is a wide variety of types of ball valve, for example, decorative, special, having internal and external threads on one side only, American ball valve, etc.

In general, an American faucet allows you to solve one important problem when installing plumbing, it is a replacement for a standard plumbing fixture, which consists of such elements as a long thread, a coupling, a lock nut, a plumb thread. It helps to simplify the task and with a few turns of the wrench to pull off the crane itself and its American.

Also, an American crane is used for the installation of heating radiators. The battery, attached on both sides by an American tap, becomes easily removable. Another plus here is that the water supply can be adjusted by hand, and as a result, the temperature of the heating radiator during operation.

Compared to plastic faucets, the American faucet is able to withstand higher operating temperatures, but they are not designed for extreme temperatures.

The working medium of an American can be hot and cold water, as well as a liquid non-aggressive medium transported through a process pipeline. The operating temperature should not be higher than +120 degrees Celsius.

An American corner is simply a necessary element so that you don’t have to pile up a lot of connections.

Like any ball valve, an American crane differs in the type of handle:

The butterfly is placed, as a rule, on cranes with a small section, since such cranes require little effort when turning. And the handle-lever is used for taps with a large section, where more effort is required to turn.

In any plumbing work, a reliable connection is the most important indicator. Ensuring water tightness is very important. For this, various nuts, fittings, gaskets, etc. are used. However, according to statistics, the tool that creates the highest quality and most effective tightness of the connection is American plumbing.

The structure and size of plumbing "American"

By design, an American is classified as a coupling with a union nut. With this element, a direct connection is created, and this simplifies many installation work.

The standard American kit includes a union nut, gasket, pressure fitting and nipple.

When choosing, you need to pay attention to the model, each model has its own parameters. The nut in diameter can be from twenty to sixty millimeters.

Mounting

As mentioned above, an American allows you to create a high-quality and convenient threaded connection quite simply. So, you can do the work of replacing the plumbing element yourself.

An American with an internal thread is used to connect pipes with the same diameter. At the ends of each pipe, seven turns are cut using a special cutting tool (die). Further, there may be several options for connections.

Before directly twisting the American at the end of the pipe, a sealant is placed there clockwise. The first turns should be left without a seal for easy putting on an American. The American is screwed onto the seal with a key. The material can be sealed with improvised means, for example, energy flex, flax, polypropylene tape, etc. The second end of the pipe, after the thread is twisted, is sealed and the second part of the American is wound onto it. So the two pipes are connected.

American mounting tool

When installing a structure using an American, they use wrench. He is the best for this job.

American is a universal connection, without it it is almost impossible to carry out installation work. It is used in the connections of the metering device and fittings to the pipeline of the hot and cold water supply system, in plumbing with threaded couplings, as well as for polypropylene pipes.

Currently, the American is being produced as a separate element or as an addition to certain types of fittings for the pipeline.

Another connection option is:

thread is cut;
winding the seal;
a long thread is wound on the second end of the pipe;
a lock nut is screwed onto a long thread, then an American;
a second pipe is installed;
two parts of an American are connected;
winding the seal;
the locknut is tightened close to the American.

Approximately the same principle of connection using an American with an external thread.

The American is installed on the pipeline in a place accessible for inspection in any position; the direction of the liquid does not affect the installation.

In plumbing, an American is always used for such work as replacing a heating radiator, installing a meter for hot and cold water, installing shutoff valves, connecting individual sections of pipes, installing deep filters. This makes the design very convenient for further maintenance.