Choosing a pump station

The problem of access to water is still relevant for summer residents and owners of country houses. To solve it with the help of one column in the whole street is the last century. There is a more modern way, which saves time and effort on household chores - pumping station.

The water pumping station serves the homes of the private sector within and outside the city. It does not function by itself. This is an integral part of the autonomous system, which is necessary for supplying water from a source to engineering communications. The main task of the station is to maintain a stable level of pressure. When it is stable, water is absorbed and transported evenly. Often, gardeners and homeowners try to save on station operation by replacing it with a garden pump with hoses and an automation unit. But the simplified version does not control the pressure. Therefore, it is not able to prevent water hammer.

Water hammer is a sharp surge of water in the pipes. It is caused by a change in the rate at which the flow of water moves inside the pipes. The reasons for the jump may be different, and the result is one - reducing the life of pipes and valves. All this can lead to an emergency and as a result only increases the cost of production of water. Also, the system of the pump and the control unit does not allow pumping water, adjusting the pressure and temperature.

A full-fledged station has one more function. Water tank in the design serves as a spare tank for water. If the electricity is turned off or the water in the source disappears for any reason, for some time the supply of water in the tank allows you to use the system as before. It is important to consider the potential of this reserve when we select a pumping station.

There are different types of pumping stations according to the principle of device, power and other characteristics. All species combine several features:

• the station can be connected to any source of water supply: a well, a well, a central water supply system, a natural reservoir;
• device pumping station allows you to adjust the force of water pressure in the faucet or watering hose;
• from one source, water can flow into different channels (into the bathroom, into the kitchen, into the garden irrigation system) without losing pressure;
• system design is carefully thought out, so any of its elements must be repaired and replaced;
• quick assembly and disassembly if necessary;
• the station consumes electricity for work and, therefore, requires finance for its maintenance;
• during operation the station is noisy - the noise level is comparable with the old-style refrigerator;
• in practice, the work station is not as productive as in the accompanying documents, as manufacturers always indicate the maximum parameters of power and performance.

From time to time there are interruptions in the operation of the pumping station. This does not mean that a dishonest manufacturer sells faulty equipment. The reasons, as a rule, are that water from natural reservoirs is actively filtered. Garbage of different “caliber” clogs the filter and clogs up in the functional elements of the device. Here are some common problems: the pump is jerky, does not supply water, does not turn on or does not turn off, buzzes, but does not work. To quickly eliminate the cause, it is important to understand what elements the system consists of and what its principle of operation is.

Station device:

• Pump - the heart of the system. It is formed by an electric motor and pumping part. An electrical cord with a plug comes out of the motor, connects to a power cord, or directly to a power outlet.
• Hydroaccumulator. The minimum volume is 18 liters, the maximum exceeds 100 liters. To give enough minimum. For a residential building, the more the better. Since it works as a reserve, a large volume will allow longer use of water until the problem is resolved. Inside the battery is the so-called rubber "pear".It has the ability to taper and expand under the pressure of water, therefore it prevents hydraulic shocks. Pears are made of several types of rubber: butyl, ethylene propylene, butadiene rubber. All are suitable for drinking water and can withstand high temperatures. But not the entire volume of the accumulator is filled with water. This tank is divided into two parts: for water and air. Due to this combination, the pumping station is able to work for some time after a power outage or interruption of the water supply.

• Connecting hose. This is the link between the first and second element.
• Automation Kit or control unit. Regulates and maintains stable system pressure. With low pressure, it starts the system, with high pressure it switches it off. The set includes pyaternik, monometer, pressure switch. Required items that are purchased separately: check valve and filter. The task of the check valve is to retain water in the tank so that the motor does not run idle. A filter is necessary to clean water from debris and impurities. Removable filter is easy to clean. This prevents many problems.

To start the system, the pumping station is not enough. It needs to interact with all elements. These include:

• water source;
• suction pipe (filter and valve are located at the end of the pipe, directly in the water);
• injection pipe;
• nipple;
• crosspiece;
• transition nipple;
• flexible eyeliner or hose;
• pipeline to water consumers (washing and dishwasher, shower, faucets, toilet, boiler).

After connecting the system to the power source and the first start (this procedure requires a one-time preparation with an independent filling of water in the tank), the control unit begins to monitor the operation. On the suction pipe water is pumped from the source, enters the accumulator until full. From the reservoir, pressurized water flows through pipes to water consumers. If cold water is turned on, it directly enters the faucet. When the hot water is turned on, the liquid from the tank enters the boiler, it is heated to the desired temperature, and only then enters the mixer and into the faucet.

When the tap is opened in the house, the pressure in the tank begins to fall. While in the tank of the hydroaccumulator a supply of water is consumed and the voltage drops to a critical point, the system does not pump out a new “batch”. After reaching the minimum threshold, the water intake is resumed, and the pressure begins to rise to the maximum. This saves the cost of maintaining the station and does not affect the pressure of the water.

Autonomous water supply stations are of different types. The criteria for classification are several criteria: the scale of use, the nature of station management, the level of water rise, the way water is sucked, the type of tank, the source of water supply.

According to the scale of use, industrial and domestic stations are distinguished.

The stations are used in high-rise apartment buildings, utilities, and industrial premises. Their purpose is to provide water to objects that require uninterrupted water supply with good pressure. This is due to the high pressure.The design of industrial water supply stations is not fundamentally different from domestic ones. But the sizes and types of stations are different.

Different sources of water intake. This may be a natural reservoir of large dimensions, a central water supply network, artesian wells. From different sources comes water of different quality. From some it needs to be cleaned additionally.

Depending on which way the water goes from the source to the consumers, there are several levels of recovery.

• Pump stations of the first level of rise meet seldom. The water they pump out of the source must be very clean. It immediately enters the water tanks or water towers. The process of the pump is uniform, without interruption.
• The second level of lift means that pumping stations pump water not from the reservoir itself, but from the tank where the water has been cleaned. From the second level, water can reach consumers, therefore, the station works intermittently, as water is used in houses.
• Stations of the third level of rise continue to enter into a complex system, where between the water source and the consumer there are several stages of cleaning and distribution of water resources.

Industrial pumping stations can be located vertically and horizontally, have a positive or negative height of the water intake. Household is usually limited in this regard. They pump out water from the bottom up and are set strictly horizontally.

Pumping stations serving large objects operate according to three schemes:

• Straight - water is taken from the reservoir, filtered and supplied to consumers. After working out again cleaned and discharged into the reservoir. Characteristic of public services.
• Sequential - after the first use, the water passes through a simple filtration and gets into a new facility, where there are no high quality requirements. Used in production.
• Reverse - closed cycle of water resources use. The beginning and end of the cycle imply multiple filtering.

Station management can be manual, automatic, semi-automatic or remote. The main difference between industrial and residential stations is not only and not so much in size as in the power of the pumps. Due to the fact that high-power vacuum pumps are used,the system copes with large volumes of fluid without loss of performance.

Its features in industrial systems in terms of location. They are terrestrial, semi-submerged and underground. Industrial-type pumping stations include:

• hydraulic;
• swap station;
• booster (booster station);
• circulating;

• pumping;
• fire department;
• modular;
• pumping and filtering.

These stations are needed to service homes in the private sector. In the cottage or country house the main purpose of the pumping station is to supply water to the communications, bathrooms, household appliances for washing and washing. In the country, the station is more often used for supplying water to greenhouses and watering the vegetable garden. There is another type of pumping stations - sewer. SPS is a system of hydraulic equipment for wastewater disposal.

The purpose of the KNS is to collect the waste liquid and transport it to local treatment facilities. Used when recycled water masses do not leave on their own. Commercially, they are also used. KNS is arranged "mirror" in relation to the water supply station.The evacuated water does not flow back into the pipeline due to the fact that it also has a check valve. Waste water passes through the filter so that large trash remains on it. The filter is called a basket. To clean it, you need to go down the sewer.

In the KNS system there can be more than one pump if the capacity of one is too small to cope with the volumes of wastewater. They are controlled either manually or automatically. The use of a household water supply station (sometimes in combination with a SPS) is necessary if there is no centralized water supply. You cannot do without it in the house, but it is important to take into account that the system has not only advantages, but also disadvantages.

The advantages of a private station:

• Significantly simplifies life in the countryside and in the private sector. If you have your own pumping station, you can take water anywhere: in the kitchen, in the washing machine and dishwasher, in the shower room, in the greenhouse, in the garden, in the bath, even in the pool.
• Provides a good and stable water pressure. It can be smoothly adjusted to the desired level.
• The ability to choose from a wide range of equipment (in size and function) a system that will be optimal for working in specific conditions.
• Economical power consumption.Smart automation controls the process of pumping water so that the motor never runs idle.
• The larger the tank, the longer the system will operate in emergency mode without being connected to electricity.
• Uninterrupted supply of water to all consumption objects in the house. It also provides automation. It only remains to check the sensor performance from time to time.
• Most often the source is located deep underground. This is not the result of recycling, but pure drinking water without impurities.

Minuses:

• In a private house water is needed all year round. It is possible to operate the station in a cold time only if it is installed in a warm place. This imposes restrictions on the choice of model and its location.
• The water source is not always available immediately. Often it is necessary to drill a well, and this process is fraught with some difficulties. First, the services of drillers are not cheap. Secondly, you need to accurately determine the place where the water will always be available. Third, the wells fall off over time. Because of this, the water supply may deteriorate and the filter may become clogged.
• Pump station of any type of noise. The quieter the unit operates, the more complex it is and the higher the cost.
• Filters must be cleaned regularly of debris, and sometimes replaced. If this is not done, the garbage will fall into the valve or tank, the system will fail.
• In the aggregate of all actions (drilling, buying, installing and maintaining a pumping station) is an expensive pleasure. Over time, the system will pay for itself, but will have to invest a lot in it.

Household stations are of two types: self-priming and automatic. Self-priming station is a type of automatic. Its design is simple and designed for lifting water from wells of shallow depth. Automatic station more practical and safer. Having small dimensions, it can serve the whole house with several consumers of liquid.

Automatic stations by the method of suction fluid are divided into:

• Whirling. Simple and unpretentious devices that are able to pump out water from a depth of up to 7 meters. They have low productivity, but stable good pressure. The price of vortex stations is the lowest.
• Centrifugal. An order of magnitude more powerful vortex due to the fact that the centrifugal wheel creates the necessary pressure. They are able to pump out water from wells twice the depth - about 15 meters. In addition, the centrifugal station withstands temperature drops in suction water. It is safe to use during the cold season. At cost, this unit does not belong to the budget.
• Multistage. The optimal solution for a shallow water source. They suck up liquid from a depth of up to 7.5 meters, while providing a stable pressure head and have high performance. The advantage of multistage stations is in their silent operation.
• With remote ejector. Differs in difficult installation and "capriciousness" in operation. The device may fail due to filter blockages or air entering the system. But the station of this type copes with the extraction of water in difficult areas, where groundwater is located at a depth below 15 meters. The maximum depth at which it works is 45-50 meters.
• With integrated ejector. The depth of such stations is up to 9 meters. They are not afraid of blockages and air that can accidentally get into the system.Used for different sources of water supply.

The disadvantage of this type of station is a noisy engine. It is not recommended to install the station in a residential area or close to it. The method of station location relative to the water supply source also differs. Submersible stations imply that the ejector remains on the surface and the hose is lowered into the water. Such a device is easier to manage, it is easier to repair and control. Suitable for shallow water sources - up to 10 meters.

The criteria for choosing a pumping station for a private residential house and giving are not the same. In a residential area, there are more water points, a higher requirement for cleanliness, and more used volumes per day. At the cottage water is consumed sparingly, parsing points are usually 2-3, filtration requirements are less stringent.

Besides the fact that water supply stations must be different for home and summer cottage, it is important to take into account that the choice is also influenced by the type of water source.In one case, submersible units are needed, in the other, submersible ones. In one area, the depth of water intake is only 4-5 meters, and in the other it can be more than 10.

Selection options:

• Power the pump. This parameter determines the performance of the station and its capabilities. The more powerful the pump, the higher it will be able to raise the water. This is important to consider when the depth of the well is more than a few meters or the height of the house exceeds one floor. To determine the total capacity, you need to add water consumption by all sanitary means. When they are simultaneously turned on, the pressure must remain at the same level, that is, the pressure drop is not felt.

• Performance. This characteristic shows how much water the station is pumping per unit of time (usually a minute or an hour). Since the water needs of all are individual and there can be any number of points, it is impossible to accurately calculate the minimum permissible parameter. According to approximate data, it takes 15 liters per minute to one point of water distribution (for example, a tap in the kitchen). To calculate the approximate water consumption, you need to add all the parsing points in the house.At each flow conditionally taken for 15 l / min. It is important to consider that manufacturers indicate the maximum capacity of the unit. If the documentation says that the station is pumping 55 liters per minute - this is the limit of its capabilities.

• Maximum height of rising water. There are two aspects to consider here: the distance from the ground to the communications on the 2nd or 3rd floor (if they are there) and the distance from home to the station. The station is located as close as possible to the source of water supply. The vertical and horizontal indicators correlate as 1:10. For a station, this means that its performance decreases as the height and distance of the house from the station increase.

• Depth of water intake. This indicator is determined by how deep the water source is. If the distance is short - 100-150 cm, any station will do. If the depth reaches 6-8 meters, multistage stations and stations with an external ejector are suitable.
• Volume of the hydroaccumulator. Its capacity is important for creating water supplies in case of power outages and other problems. An important point: the “fire” case will not have the entire volume of the battery, but only half.This is due to the fact that part of the tank volume is filled with air.

• What's inside the hydroaccumulator (water tank). If water is used as drinking water and is used for cooking, there must be suitable materials inside the tank. Often the tank is equipped with a rubber "pear" of different sizes. Butyl, rubber, ethylene-propylene membranes, butadiene-nitrile are materials that are safe for use in the pumping station. They may come into contact with drinking water without saturating it with substances harmful to the body.

• Air pressure. For any tank volume, it should be 1.8-2 atmospheres. This parameter is checked with a pressure gauge. If the figure is below normal, the air must be pumped. Low air pressure leads to the fact that the jet pressure in the faucet will be weak and unstable.
• What the station body is made of. The production uses cast iron, stainless steel and PVC materials. Hygienic features and the strength of the "stainless steel" is better than other materials.

• Accessories. They may not be included, but they are necessary for the normal functioning of the station and extending the service life.Accessories include: non-return valve, filters, sensor for protection against "empty running". The sensor is installed on the station and connected to the electrical network. They prevent the pump from running without liquid and prolong its life. The idle operation is harmful to the motor, as it heats up during operation, and the liquid cools it. Also, water plays the role of lubrication. For obvious reasons, another type of lubricant cannot be used - the water will become non-potable.

The filter must be purchased with a good cleaning system. At the same time, its design should be convenient for regular cleaning of impurities. In addition to the technical characteristics of the station, the performance of the water supply source plays an important role. It is necessary to take into account at what level the water mirror is, what is the “debit” volume of the well or well.

The productivity of the well must be greater than the productivity of the station. The approximate volume is 1.5-1.7 cubic meters per hour with a station capacity of 3-5 cubic meters per hour. Not least is the price parameter. Save on the water supply system is not necessary. A pumping station of quality materials from proven manufacturers will quickly pay for itself.Cheap station, acquired from the desire to save, will fail faster.

The best recommendation for choosing any equipment for regular use is that given by the owners of the equipment. A consultant in a store can praise a product as much as he wants Its' his job. But users who have tried the technique “in the field” can tell what its strengths and weaknesses are and what manufacturer you can rely on without fear. For convenience, the rating is divided into the best stations for the dacha, for the cottage and the top stations for country houses. Since the operating conditions and the load at the dacha will be different in the house within the city and in the suburban building, the equipment required is not the same.

In the country does not need a station with maximum power and additional filtering, if the water is used mainly for watering plants and washing dishes. Often, summer residents prefer to pump water from a well or the nearest reservoir. There is a reason for this - a pump with a hose does not need to be protected from winter frosts. In the cold season it can be pulled out and stored for storage in the household. the room. The station requires care, but it has more advantages.We already spoke about them earlier.

It is important to choose a station that will survive the winter well and will not consume too much energy. Such units are in the middle price range and below average. These include:

The specific model should be chosen according to individual parameters. “NeoClima” is a collaboration of Russian and Chinese manufacturers. Product price - 5000-7000 rubles. Users note the simple operation and "endurance" of the station in different weather conditions. It is convenient to give that is more suitable for drawing water from a well or a natural reservoir. This reduces drilling costs.

NeoClima is a surface type station with a capacity of 1.5-2 cubic meters per hour. The maximum value is 3. The immersion depth is up to 8 meters, the level of water rise without loss of pressure is 25-27 m. According to the reviews, water from this depth is suitable for any needs. The stainless steel case ensures a long service life. Among the shortcomings note the thin connecting hose from the pump to the accumulator and a short cord to connect the station to the mains.

Another unit made in China.Reviews are mostly positive. With a modest price of 6,000 rubles, it is an indispensable summer resident assistant. The equipment serves at least 5 years with maximum permissible loads.

Like the previous version, this is a surface installation station with an average capacity of 2 m³ / h. The level of rising water - up to 30 meters (for technical documentation - up to 40). The disadvantage is that the valve and filters are not included. To complete the product can only be accessories from the same manufacturer.

The starting price for a station with a 20-liter tank is 6,500 rubles. Technical parameters are similar to the first two models. Among the positive reviews, the complete equipment of the station is noted: valves and filters are included, it is ready to work from the moment of purchase. The pump is also protected from running dry.

The filtration system protects against the ingress of leaves and coarse debris into the water supply. This is a plus, since the system is designed for installation in an open pond. The lack of a station that explains its low cost is the plastic case. He takes the winter hard and mechanical damage.

The price for installing a “garden” pumping station is higher than that of Russian and Chinese counterparts - from 9,900 rubles. This is explained by the Swedish production.Users note that the pumping station is not for beginners. She is very good at exploitation and solves the tasks of the cottager, if he knows exactly what to do with it and how to take care of it when the season is over.

Plus to efficiency - silent operation of the pump. Inexperienced gardeners speak negatively of plastic parts in the structure of the pump. It is difficult to pump out the water from the tank, and if you leave it, the system will fail during the winter. Also noted as a lack of weak threads on the pipes.

Products of the Russian manufacturer with an average price tag for a similar station from 8500 rubles. Users rate the product on a solid four. The unit failed to reach the mark “excellent” due to the fact that it was difficult to put it into operation. The initial launch is described in the passport of the product sparingly, you need to calculate everything yourself. In addition, part of the body is made of plastic parts.

For a country house permanent residence you need a station with greater capabilities than a garden. The price of equipment grows in proportion to its functionality. Popular models:

• "Dzhileks Vodomet Prof." Russian-Chinese products at an average price of 25,000 rubles. Its volume is slightly more garden stations - 24 liters, but this baby is able to provide the livelihoods of a family of 3-4 people. The station refers to surface installations. Pumps out water from a depth of 20-25 meters. The manufacturer indicates 30, but user reviews say that this number is too high. Without loss of pressure, the station raises water to a height of up to 75 m. At the same time, its capacity is 2-3 m³ / hour. Among the advantages of a full set of equipment. It is only necessary to connect the system to the water source. Convenient, simple filter replacement if necessary. Simple operation, clear instructions and basic settings. The main lack of equipment - with intensive use, the service life is limited to 4-5 years.

• VMtec Altera Auto. Reliable equipment of the German manufacturer at a price of 27,000 rubles. The equipment is fully adapted for use in the conditions of our country. It differs from standard pumping stations by the absence of a hydroaccumulator. Equipped with a new type of tank. With a lower height of the water lift - 40-42 meters, it has excellent performance - 4-4.5 m³ / hour. The depth of the water intake is close to 30 meters.As pluses in the reviews mention the lack of plastic parts, a complete set and all protection systems. The equipment is fully automated.

• "Wilo HMP". In its segment, the price of this station is above average - 29,000 rubles. At the same time, you need to add the cost of buying the sensor against the “dry run”. Despite the price, the station is popular. She pumps out water from 25 meters and raises on 25-27. Productivity in the conditions of hard work - 6 m³ / h. This is more than the Chinese 2 times. The volume of the hydraulic tank is 50 liters. The pumping station is marked as a reliable and exemplary system for a private house.

• Grundfos. Reliable and extremely easy to manage station cost from 30,000 rubles. Users note that such a high price is assigned only for reliability and long service life. The depth of the water intake - only 8 meters, performance - 2 m³ / hour.
• "Unipump Auto DP". The budget alternative to Chinese-made and Russian assembly at a price of 13,000 rubles. Suitable for small houses and families of 2 people. The technical parameters closer to the garden, but the depth of suction increased to 20 meters.

A cottage in the city and outside it is a room with a large water consumption. At the same time the quality of the feed should be consistently good.Only powerful pumping stations handle this task. Their technical characteristics are superior to simple models. But, which is typical, the performance of such stations due to the large number of water consumers at an average level - 2-3 m³ / hour.

The cost of equipment varies in the range of 60 000 - 100 000 rubles. They speak positively about the products of manufacturers Grundfos and Espa. Well-proven Italian brand: Ergus, Marina, Perdollo. In addition to high prices, they have all the necessary characteristics. It is reliability, long service life during intensive work, the absence of plastic parts in the design, precise automation. Often the stations are equipped with valves, filters and sensors.

There are two ways to connect a pumping station to a water source.

• To any source directly. That is, to the well, well, reservoir. It should be chosen if there are no problems with water supply from a natural source: a mirror at a level of up to 10 meters, good well performance, high quality water without impurities.
• To the water supply. It is resorted to when the water from the well is intermittent or not at all, and its quality is unsatisfactory. Another reason is outdated equipment. If the pump is old, it does not cope with its task.Additional head pressure needed.

Connection to natural water sources is the same. Some stages differ slightly depending on the type of pumping station.

Here it is important to keep a balance. The distance from the station to the water source should be minimal. This will provide good pressure. At the same time, the station should be protected from freezing in winter, but it should not be located near the resting places. The equipment is noisy, it will annoy the household.

To install the station is suitable:

• Boiler room - specially equipped room inside the house. Important quality insulation and the distance between the boiler room and rest rooms.
• Basement. Suitable for installation if it is dry and warm. Additionally you need to install noise insulation.
• Well. Brackets and a “shelf” for the station are mounted inside the well chamber (ring). The option is bad because the station can freeze to death in winter.
• Caisson - a recess near the well in which the station is installed. The difficulty is to correctly calculate the depth. The station in the caisson should be protected from freezing by the temperature of the earth.

The laying of the pipeline solves the problem of interruptions in the water supply. It is carried out in several steps:

• Dig a trench. You need to dig at a depth such that the pipeline does not freeze. With a small deepening is to insulate the pipeline. Budget and quality material - mineral wool with a foil base.
• Make holes in the foundation and walls under the pipeline. Holes, too, need to be warmed, so that because of them there was no heat loss in the house.
• Put the pipes.
• Connect the pipe system to the pumping station.

If the equipment is already equipped with a filter and a check valve, the stage can be skipped. If not, you need to install these parts on the hose (pipe) from the side that sinks into the reservoir. The filter must be well fixed with one or two couplings. Hose immerse in the pipe. After that, you can put in order the tip of the well so that it does not crumble. With other sources do not need to do anything.

It is necessary to combine all external parts into one system. First set the station to the allotted place.Then, using a coupling and a direct crane, connect it to the pipeline. Last, in a similar way, connect the station with a message point to the water supply network.

A prerequisite is to fill the station with water through the filling hole. The pump should not run dry. After filling with water, you can turn on the power supply. During the test, the water will “push out” the excess air from the pipes and stabilize the pressure. If the station turned off when the maximum value was reached (1.8-3 atmospheres), the connection was made correctly.

• In order for the station to serve for more than 5 years and not let it down at the same time, it is necessary to select and connect the equipment correctly. Before buying a pumping station, you need to find out the depth and performance of the well (well). The water in them is gradually consumed until it dries out, and then it is recruited again. This happens quickly. However, the well productivity must be greater than the capacity of the station.

• When choosing equipment, a mandatory step is to study technical documentation. All indicators are given at the maximum level. Focusing on the real tasks for the station, you should choose a modelwhich at all points is more powerful than necessary. For example, a capacity of 4 m³ / hour in documentation will actually be 2.5-3 m³ / hour. It is important to check the warranty period and clarify the conditions. The reasons for the breakdown are many. It should be possible to contact the service center for free repair at least during the first year. A better two.
• Installing the station, you need to put under it 1-2 layers of rubber gasket. This will reduce the vibration and noise that the pump makes. Also, do not lean the equipment against the wall so that sound bridges are not created. When the station is located on the street, it needs to be warmed. If it does not work in the winter (at the cottage), you need to pump out all the water so that the parts inside do not freeze. And most importantly - do not overload the equipment. The level of water consumption should correspond to the capabilities of the pumping station, then it will serve for a long time and regularly.

How to install a pumping station with your own hands, see the following video.