Pump for watering the garden - choose the best option from the proposed

If country estates have a personal plot, then, most likely, it is used either for agricultural or for decorative and floricultural purposes. And in fact, and in another case, you can not do without the regular conduct of certain agrotechnical work. And irrigation will always be in the foreground - without effective irrigation, especially in dry summers, it is hardly possible to achieve a high yield, beautiful flowering flower beds or even just a juicy green lawn.

Even in the case when a water main is connected to the site, using water from it for irrigation is by no means the best solution. Firstly, it is very wasteful, and secondly, such water undergoes certain processing, including chlorination, and is not very useful for plants. For irrigation, it is better to use some natural source, but to use it you will need special equipment - a pump.

However, if the buyer goes to the store or enters the online catalog unprepared, he may encounter a lot of questions that make the optimal choice extremely difficult. Pumping equipment is very "many-sided" and differs not only in technical characteristics, but also in operational capabilities. It is necessary to take into account many criteria in advance in order to leave your choice on the model that is most suitable for the existing conditions. This publication is dedicated to this - we buy a pump for watering the garden: varieties, selection, installation, basic operating rules.

Where will the water come from?

It is impossible to choose the right pump if you do not decide in advance where the water will be taken from for irrigation. There may be many options here.

The most successful "layout" is when the site has its own or located in the immediate vicinity of a reservoir of natural origin - a pond or lake, fed from underground sources or a stream and having a sufficient debit of water. It is possible to carry out watering from the river flowing nearby. In any of these cases, a surface pump or a submersible (semi-submersible) drainage type may be required.

If the site has an artificial reservoir - a pond or pool, then it can also become a source of water for irrigation. All the same, the water in it should change regularly, and these two operations can be combined - supply fresh water to the pool, pumping it out to the garden that already needs to be replaced. True, on one condition - that no chemical reagents were used.

Even a somewhat swampy reservoir can serve as a source of water for irrigating the site, but in this case you will have to purchase a special kind of drainage pump, which is designed to pump dirty water.

However, such ideal conditions are rare. Most often, one has to resort to artificially created water sources.

For irrigation, you can use water from a well or well. For wells, both surface pumps (with a shallow aquifer) and submersible pumps can be used. For wells where water is usually found at great depths, only submersible pumps of a special type are suitable.

Water intake from wells requires special pumping equipment
To raise water from a great depth and at the same time provide it with sufficient pressure and the required flow rate for further use - not any equipment can handle this. How to approach - read in a separate publication of our portal.

However, an important note should be made immediately. Any experienced gardener or gardener will say that using water directly from their well or well for irrigation is highly undesirable, since such irrigation of plants can do them more harm than good. The best option is that the required volume for regular watering is pumped in advance into containers installed on the plot. The water will warm up in a day, get rid of the chemical compounds dissolved in it, and become quite suitable for irrigation. By the way, this approach opens up wide opportunities for the competent use of fertilizers and dressings with strict adherence to the recommended proportions of dilution of the compositions.

For a set of containers, the already mentioned well or borehole pumps are used. But directly for irrigation, it will be possible to acquire a compact surface-type garden pump or special submersible models designed specifically for taking water from containers (barrels, eurocubes, home-made tanks, etc.).

A good owner should not lose anything, including rainwater, the collection of which in garden containers is very often organized from drainage systems. And besides, if a competent storm sewer is organized on the site, then a storage storm collector can also become a source of water for irrigation. In this case, the submersible drainage pump will again become an assistant.

How is storm sewer arranged?
Unfortunately, not everyone remembers this system for draining water from the local area, or they ignore its creation in the hope that everything will somehow “dissolve” by itself. Why this approach is wrong, and how to create it correctly - read in a separate article on our portal.

So, the choice of a pump for irrigation in the first place will depend on the type of water source used.

What performance and pressure ratings are required?

Whatever type of pump is chosen, this unit must fully cope with the functions assigned to it.

Firstly, it must ensure the pumping of the required volume of water at a certain time - this is an indicator of performance.

It is not difficult to calculate this parameter. They proceed from the fact that according to the existing rules, for high-quality irrigation of one square meter of land, from 3 to 6 liters of water is required (depending on local climate conditions, characteristics of crops grown, and steady weather). It is best to calculate to the maximum - this will create a certain reserve of productivity, but everyone is free to decide this issue on their own.

Of course, only the area of \u200b\u200bthe site that is allocated for crops that require regular watering is taken into account. If lawn or flower beds are cultivated, their area is also taken into account.

The next value required for the calculation is the time that is planned to be spent on watering the entire area. Usually this event is held in the evening, after the subsidence of the heat of the day and the aggressiveness of direct sunlight, so an hour or two will probably be enough.

To find the required productivity (usually it is indicated in the technical documentation by the symbol Q), it remains to multiply the area of the irrigated area and its irrigation rate, and divide the resulting value by the time allocated for irrigation.

Q=S uch ×N/t

S uch – irrigated area (m²).

N- the accepted watering rate is from 3 to 6 l / m² (for individual crops it may be more).

t- the time allotted for watering the site.

For ease of calculation, you can use the proposed calculator. The area in it is indicated in acres - so many gardeners are more familiar.

Irrigation Pump Capacity Calculator

irrigated area, acres

accepted irrigation rate per 1 square meter

estimated time for watering the site

Often, in the documentation and on the rating plates of the devices, the productivity is indicated, expressed in liters per minute (an example is shown in the figure with a red arrow). Therefore, this value is also provided in the calculator.

2. The next most important indicator is the amount of pressure created by the pump. Usually it (H) is expressed in meters of water column. The pressure must be such as to ensure both the rise of water to the required height from the source to the point of consumption, and stable movement along the horizontal sections of the pipe, and the necessary pressure at the inlet is maintained, without which, for example, sprinkler installations cannot work normally.

To calculate the required pressure, the following values \u200b\u200bare required:

Height difference between pump location and highest irrigation point. If a submersible type pump is used, then the differential is calculated taking into account the depth of the pump installation, and not from the surface of the water.
The horizontal distance from the location of the pump to the farthest point of the area irrigated by it.

You can often find the statement that 10 meters of a horizontal pipeline, due to hydraulic resistance, will correspond to 1 meter of a vertical section. This is not entirely true. Indeed, the pressure loss in a horizontal section can be defined as 1 m of water. Art. 10 running meters, but only with a pipe diameter of 1″. If narrower hoses are used, the hydraulic resistance will be much higher. So, with some simplification, we can take losses equal to 1 m of water. for 7 lines m with hoses with a diameter of ¾ ", but if very narrow ones are used, in ½", then even 1 m of water. for 4 running meters.

Hoses almost never stretch in a straight line. This means that a certain correction should be made for possible bends and turns. In addition, there may be couplings, fittings, taps and other reinforcing elements along the water route - all this increases the overall hydraulic resistance of the route. It will not be a big mistake to take into account these two nuances to introduce a 20% allowance to the total head for a horizontal section.

So far, the pressure required to deliver water to the point of consumption has been calculated. But for normal irrigation or for the correct operation of irrigation devices, another one and a half technical atmospheres (bar) is usually required. This corresponds to a head of 10 ÷ 15 meters of water column. Hence, the resulting value must be increased by this value.

Example 1:

The surface pump is located on the shore of the reservoir. The excess of the highest irrigation area is 3 meters. Length to furthest section 150 m. Uses ¾ inch (20 mm) hoses.

The total value will be equal to the height of the excess plus the calculated losses in the horizontal section (based on losses - 1 m wc / 7 linear meters), multiplied by a correction factor (20%) and plus the required head at the outlet of 15 m.

H \u003d 3 + (150 / 7) × 1.2 + 15 \u003d 43.7 meters of water column.

Example 2:

The submersible pump is lowered into the well to a depth of 12 meters below ground level. It is required to transfer water for irrigation to a distance of 70 meters along a 25 mm (1 inch) hose. The excess of the irrigation area above the well site is 5 meters.

H \u003d 12 + 5 + (70 / 10) × 1.2 + 15 \u003d 40.4 meters of water column.

For ease of calculation, the corresponding calculator is placed below:

Calculator for calculating the required pressure of the pump for irrigation

Specify the requested values and click the "Calculate" button

the value of the total excess of the irrigation area above the pump installation point

distance from pump to furthest point to water (hose length)

used hose diameter

amendment

necessary pressure for the correct operation of irrigation devices

Of course, the resulting value should be rounded up, and when choosing a pump, it is also desirable to provide for a certain margin. For example, in both considered cases, it would be advisable to purchase a unit with a generated head of about 45 ÷ 50 meters of water column.

Some manufacturers indicate the working pressure created by the pump in bar or Kilopascals, so the calculator immediately converts these values based on the result.

Other pump specifications

In addition to the considered basic values characterizing the pumping unit, a number of other indicators should be taken into account.

For submersible pumps, such an indicator as the possible permissible immersion depth is necessarily evaluated. It depends on the power of the unit, and on the design features of the pump housing, designed for a certain maximum external pressure. The calculation of the created pressure (N) in this case is made from this immersion depth (N).

For self-priming surface pumps, the parameter is different - the depth (height in meters) of suction. That is, from what depth, counting from the water surface in the source (S), the pump is able to raise water up before creating a working head (H) in the outlet sleeve, which was mentioned above. Typically, garden pumps are capable of pumping water from a depth of 6 to 10 meters from their location, although there are exceptions both up and down. side. Naturally, the buyer, when choosing, should be guided by the real conditions of his site.

The power of the pump power unit. It would seem that the higher it is, the better. However, one should not go to extremes - as a rule, for garden purposes there is enough power of 600 - 800 W, rare models designed for dirty water exceed 1 kW. Excessive, in principle - unclaimed power will be reflected in an increase in energy costs, rapid heating of the device, increased noise and, of course, a difference in the price of the product. If the performance indicators and the generated pressure are satisfactory, then too high power is simply not needed.
The characteristics of the pump must indicate what degree of contamination it is intended for pumping water. It is usually indicated both by the text - “for clean” or “for dirty”, and the maximum permissible value of possible solid impurities (for example, up to 5 mm). Knowing the features of your water source, you can make the right choice.
It is worth evaluating the level of noise generated - it is also usually indicated in the technical specifications of the product. Here, of course, it serves to strive to a minimum so that the operation of the pump does not cause any particular complaints from home or neighbors. This, of course, primarily applies to surface and semi-submersible pumps - submersible ones are not so noisy.
An important parameter for a garden pump is its weight, compact design, ease of carrying (unless, of course, it is installed permanently for the entire season).
Attention is drawn to the degree of protection of the case. Working in a humid environment from the power supply imposes special requirements, so it is best to purchase devices of protection class IP × 5 for surface and IP × 8 for submersible.

There are several more equipment evaluation criteria that will already be characteristic of specific types of irrigation pumps. Let's move on to the main types.

Surface garden pumps

Such pumps are perhaps the most popular among gardeners who have a natural or artificial reservoir at their side. They are quite suitable for pumping water out of a barrel, a shallow well, a storage collector, etc.

Depending on the drive power, such pumps can be light mobile, equipped with a convenient handle for quick carrying from place to place, or quite massive. Powerful units are usually installed "for the season" in some special outbuilding, which will protect the equipment from precipitation and reduce the level of noise emitted by it.

The vast majority of surface pumps are self-priming. The intake sleeve is lowered into the water source, and in order to prevent clogging of the pump mechanism, a filter tip is often put on the end of the sleeve. Suction is due to the creation of a vacuum in the working chamber of the pump, and this requires compliance with two important requirements:

Firstly, the intake sleeve must be made of a durable material that retains its shape when rarefied. Rubber hose - definitely not suitable. Typically, polymer sleeves with internal reinforcement are used.

Secondly, before starting work, the pump chamber and the intake sleeve must be forcibly filled with water, otherwise the pump will “thresh” idle - it will not be able to provide the initial rise of water from the reservoir.

"Filling" a self-priming surface pump with water before starting

To perform this operation, special filler necks are provided, which are then closed with sealed caps.

According to the principle of operation, such pumps are divided into two main varieties - vortex and centrifugal.

For centrifugal impellers with blades, the incoming water is thrown from the center of the chamber to the periphery, which creates a vacuum in the intake sleeve and, accordingly, increased pressure at the outlet. Such a scheme is characterized by undemanding to the purity of water, the ability to work for a long time without interruption. The pump is quite suitable for open reservoirs, where there is a chance to "scoop" dirt. Of the shortcomings - increased noise, lower performance than vortex, and this is against the backdrop of a higher price.
A feature of the vortex is in the design of the turbine, the curved blades of which create a turbulent directed flow of water. The performance from this is much higher, and the noise level, on the contrary, is reduced. The cost of such pumps is also somewhat lower. But they have an increased “sensitivity” to dirty water, and it is dangerous to use them for pumping from a lake or river. Rather, they will be appropriate for a well, a pool, a tank - of those tanks where there is guaranteed to be no dirt, silt deposits, or solid inclusions.

As a rule, surface pumps are quite limited in the length of the suction hose - usually within 8 meters. That is, installing the device on the site, and then stretching a long hose into the reservoir - will not work. On a large area, this can cause certain inconveniences - the pump should not be left unattended for a long time (at least for the reason that it can be stolen). This is an absolute disadvantage of such devices. In addition, the disadvantages of such equipment include vulnerability to external weather influences - precipitation and temperature changes. It is imperative to monitor the heating of the pump, especially on a hot day. He does not like this idling technique, without water in the chamber - either the increased attentiveness of the owners, or the purchase of a pump with an emergency shutdown function at idle will help here.

And in itself, the operation of the pump is not difficult - it is installed near the hydrant (reservoir), best of all - on some kind of damper gasket, for example, a rubber mat. Sleeves are connected (many models have convenient floor connectors, standard quick-release connections for irrigation systems). The intake sleeve is lowered into the water to the required depth (a float or a raft can be adapted to maintain it). The chamber is filled with water - and you can connect the pump to the power supply and start working.

The table below shows several popular models of surface pumps from various manufacturers:

Model name	Short description	Capacity / column created / suction depth	average price
"Whirlwind PN-370"	Surface pump of centrifugal type of action, for clean water. Cast iron body, not afraid of mechanical stress. Built-in ejector for increased performance and head pressure. Weight 5.1 kg. Power consumption - only 370 W	3.7 m³/h 30 m w.c. 9 m	2010 rub.
QUATTRO ELEMENTI Giardino 400 Ci	The pump is superficial, for pure water, centrifugal. The power of the power unit is 400 watts. Weight - 6.5 kg.	3.3 m³/h 40 m w.c. 8 m	3000 rub.
METABO P 2000G	The pump is superficial, centrifugal, for clear water. Power 450 W. Cast iron body. Weight - 7.6 kg. The size of an input and output branch pipes - 1".	2.0 m³/h 30 m w.c. 8 m	4200 rub.
STURM WP9741A	The pump is superficial vertical execution. Aluminum pump housing, motor, cover and impeller. Power 410 W. Weight - 5.5 kg. Built-in overheating protection.	3.3 m³/h 20 m water Art. 8m	5200 rub.
GARDENA 3500/4 Classic	Modern surface pump of increased convenience in work. Two outputs - you can work in two directions at once. A convenient mouth for the gulf before start-up. Anti-noise protection - anti-vibration platform legs. Convenient carrying handle. Weight - 7 kg. Power -800 W	3.6 m³/h 41 m of water Art. 7 m	5800 rub.

Video: presentation of the garden pump "METABO P 4000 S"

Submersible pumps

Submersible pumps can be divided into three categories - borehole, well and drainage.

There is no point in considering boreholes - it is unprofitable to use them for watering gardens, they have a completely different purpose. More about their features - in the article, a link to which is given at the beginning of this publication.

True, with the help of borehole pumps, it is quite possible to quickly fill the containers for irrigation, and from there to supply it for irrigation using other devices.

Vibrating well pumps

These pumps are probably familiar to everyone - they are usually quite small in size, simple in design, unpretentious in operation, reliable, and at the same time they are distinguished by high rates of creating water pressure.

There are many brands and models of pumps of this type, but they are usually similar in appearance and have, in principle, the same device:

The vertical metal body consists of two halves – lower (pos. 1) and upper (pos. 2). A dense elastic gasket (pos. 3) is installed between them, which, after assembling the two halves using a screw connection (pos. 4), becomes a reliable hermetic seal and, in addition, also plays a shock-absorbing function that significantly reduces vibration.

The entire “electrical” part of the pump is installed in the lower half. It is a coil with a core (pos. 5), which is connected to a 220 W network through a power cable (pos. 6). The entire coil is filled with compound (pos. 7), which completely eliminates even accidental contact of the winding and its connection to the power cable with water, which ensures the high safety of such pumps in operation.

Above the core of the coil is a massive steel anchor (pos. 8), connected through a vertical rod with a diaphragm (pos. 9) and a piston (pos. 10).

When power is applied, the coil creates an alternating electromagnetic field with a constantly changing direction of the lines of force - due to the sinusoidality of the alternating current. This, in turn, causes the attraction and repulsion of the massive anchor, the reciprocating movements from which are transmitted to the diaphragm and piston.

The configuration of the piston and diaphragm is such that their movement creates a rarefaction in the working chamber in one phase of movement, and compression in the second. Under vacuum, water enters the intake holes (pos. 12) enters, and thanks to the valve system (pos. 13), in the compression phase it is pushed into the pump outlet (pos. 14).

An eye (item 15) or a special hanging bracket is provided on the casing for suspension of the pump in the water column.

The advantages of such pumps are many. The absence of any rotating components and controls in the design makes it extremely durable and reliable. Despite their small size, such vibration pumps are capable of delivering a very solid water column, amounting to tens of meters. The mass is small, and you can hang the pump using, for example, a strong nylon cord. Electricity consumption is quite economical. Overheating does not threaten the pump - it is cooled by the liquid medium in which it is suspended. The top location of the intake holes minimizes the risk of scooping up dirt from the bottom of the well.

There are, of course, their drawbacks. So, the operation of such pumps is characterized by high noise, even taking into account immersion in water. But the most important drawback is that in the process of pumping, rather strong vibrational vibrations are created and transmitted through the water column, which can lead to the gradual destruction of the clay walls of the source, the accumulation of silt deposits. Therefore, such pumps should not be used in wells - they are more suitable for wells made of reinforced concrete rings or pipes. The performance of vibration pumps, compared to centrifugal ones, is still not too high.

Working with the pump is easy. A hose for supplying water to the site is attached to the intake pipe. Then the pump is lowered on a cable (nylon cord) into the water to the desired depth, taking into account the planned flow rate and debit of the source, and fixed in this position. Any pump is equipped with a cable already installed and hermetically wound into the housing, the length of which allows connection to the power supply at the top. The cables have reliable multi-layer insulation, but it is still recommended to carefully check its condition before each use. It should be remembered that it is strictly forbidden to use the power cable as a suspension or to pull the device up.

An approximate layout of a vibration pump in a well is shown on the left side of the figure below:

1 - rubber rings, dressed on top of the pump housing - a useful home-made device that will protect the device from possible impacts on the stacks of the well when lowering and raising.

2 - a hose attached to the pump outlet and fixed with a clamp (pos. 3).

4 - cable or suspension cord.

5 - power cable.

To make it more convenient to lower and raise the pump, it is advisable to tie the cable, cable and hose into one “pigtail” using clamps (pos. 6).

7 - crossbar, to which a cord or suspension cable is attached. To dampen vibrational vibrations, it is recommended to use an additional shock-absorbing damper (pos. 8) made of a spring or durable rubber.

Usually, the owners of the site carry out such an installation for the entire season. Constant exposure to water will not harm the pump in any way - it is sufficiently protected. It is also possible to organize a temporary installation for pumping water from an open reservoir - an example is shown on the right side of the figure.

The immersion depth N must not exceed the value specified in the product data sheet. The location above the ground level at the bottom (n) is desirable to withstand about 1 meter so that the vibration waves of the pump do not raise sand and silt.

During irrigation, it is necessary to regularly monitor that the water level does not drop to the pump inlet and the device does not switch to idle - there are no automatic shutdown systems in such devices. However, it is not difficult to follow this, and the simplicity of the design is fully justified by a very low price.

Model	Short description	Productivity, created water pressure, maximum immersion depth	average price
QUATTRO ELEMENTI ACQUATICO 200	Corrosion resistant body. Overheat protection. Case diameter - 97 mm. Weight - 3.7 kg. Power consumption - 200 W. Power cable - 10 m.	1000 l/h 70 m of water Art. 7 m	1750 rub.
"OLSA Brook-1"	Time-tested model of medium capacity and head level. Upper fence. Power consumption 225 W. Weight - 4.3 kg. The length of the power cable is 25 m.	430 l/h 25 m water Art. 5 m	1870 rub.
«HAMMER NAP200А» (16)	Power consumption - 250 W. Weight - 4 kg. For pure water - the maximum size of inclusions is 0.1 mm. Power cable 16 m. The highest degree of protection - IP68	660 l/h 40 m water Art. 5 m	2600 rub.
"ZUBR ZNVP-300-15 M2" "Rodnichok"	Power consumption - 225 watts. Cable length - 15 m. Factory manufacturer's warranty for 5 years.	1080 l/h 60 m water Art. 7 m	2830 rub.

Video: Vibratory Pump Useful Tips

Submersible drainage pumps

If it is planned to take water for watering the garden from a natural or artificial reservoir, then you can purchase a submersible drainage pump.

The intended purpose of such pumps is the pumping of liquids from tanks, the drainage of basements and flooded lowlands, the emptying of storage collectors and wells of sewage systems. Such tasks predetermine the features of the overall design of the device, its stability in increased and prolonged loads, and for most pumps of this type, the presence of automation that monitors the degree of emptying of the tank and prevents the unit from running idle.

The classic form of a drainage pump is a vertically located cylinder with a platform or legs for installation on the bottom of a reservoir or tank. Water intake can be carried out from below or from above - there are different models. With a lower intake and well-adjusted automation, such pumps can pump liquid to a layer of only a few millimeters, that is, almost completely.

As a rule, all pumps of this type are assembled according to a centrifugal scheme, but the number of working chambers and their design may vary.

Schematically, the basic design can be represented as follows:

"Classic" scheme of the device of drainage pumps

Vertical sealed housing (pos. 1), made, depending on the model, of cast iron, stainless steel or high-strength plastic. It has a power cable on top. Usually there is a jumper, handle or loop for hanging the pump on a cable (item 3).

In the upper part of the housing there is an electric drive - a motor (pos. 4), from which the rotation is transmitted through the shaft (pos. 5) to the working chamber. There are several blocks with bearings and reliable seals (pos. 6 and pos. 7), between which there is usually an oil chamber (pos. 8), which provides constant lubrication of friction units.

In the lower part there is a working chamber (or a cascade of several chambers) with impellers (pos. 8). Most often, closed single-channel impellers are used, but still pumps with an open impeller are more durable, capable of pumping even heavily contaminated liquids. Some models have a special, rotary vortex wheel. Such pumps are more efficient, but they are distinguished by a high price and high energy consumption.

From below, the entrance to the working chamber is usually protected by a grate (pos. 9), the mesh size of which corresponds to the maximum allowable diameter of solid inclusions. The created water pressure is transferred to the outlet pipe (pos. 10), which is usually located with an upward orientation - for easy connection of the sleeve.

The great convenience of drainage pumps is that they can operate both fully submerged and semi-submerged. Before installing the pump, the automation mechanism is set up - the float level is set, at which the engine power will be turned off. If the water level drops below the critical level, the automation will work, and the drive will not overheat. When the level rises to the set mark, respectively, the pump will turn on again.

A typical installation diagram is shown in the figure:

1 - drainage pump.

2 - suspension cable.

3 - sleeve (pipe) for pumping water.

4 - power cord.

5 - position of the float for actuation of the automatic shutdown of the drive.

6 - position of the float for automatic start of the pump.

As already mentioned, the pump is not necessarily suspended - many models are installed directly on the bottom of a reservoir or tank. If it is planned to carry out regular water intake from the same place, many owners make a kind of “podium” - a stand, for example, from cutting a large diameter pipe or from a steel corner. However, the design of most "drainers", both with an upper and a lower fence, provides for the possibility of such an installation in itself.

One of the key parameters of drainage pumps is an indicator of water pollution with which the unit can work. So, it can be conditionally divided into devices for clean water, for dirty and fecal, which are capable of pumping very contaminated viscous liquids. Often, fecal-type pumps are equipped with a special device at the inlet that grinds organic fibers, preventing them from clogging the internal channels of the pump and the hose system.

The choice of a particular model will depend on the characteristics of a particular water source. So, for a natural reservoir, where dirt, algae, sand, pebbles, etc. can get into the intake holes, it is better to purchase a pump for dirty water. If the reservoir is prone to swamping, then the best option would be to use a "fecal".

Almost all drainage pumps have a common drawback. They are designed for continuous work on pumping large volumes of liquid, that is, they are distinguished by excellent performance. But you can’t say the same about the pressure created - usually it is small, and direct watering with such a pump will present certain inconveniences. That is, they are convenient for delivering water from a reservoir or, for example, a collector to containers installed in a garden, but the pressure they create may not be enough for irrigation installations.

Model	Brief description of the model		average price
Caliber NPTs-750/35P	Drainage pump for clean and dirty water. The maximum size of solid inclusions is 30 mm. Power consumption - 750 W. The length of the power cord is 10 m. Float mechanism of automation	13.5 m³/h 8 m w.c. Art. 6 m	2650 rub.
Gardena 7500SP	Convenient model with a branch pipe adapted for quick-release connections. Float mechanism and protection against overheating. Weight - 4.3 kg. Power consumption - 340 watts. Cable 10 m. The maximum size of contaminants is up to 10 mm.	7.5 m³/h 6 m w.c. Art. 8 m	6800 rub.
GRUNDFOS UNILIFT CC 7 A1	Dirty water pump with a maximum particle size of up to 10 mm. Allows you to pump water to a minimum level of 3 mm. Dry run protection. Universal outlet adapter. Cable length - 10 m. Weight - 5 kg. Power consumption - 380 W	9.5 m³/h 6.5 m w.c. Art. 10 m	11900 rub.
Metabo TPF 6600 SN	Combined housing made of stainless steel and high strength polymer. Pure water pump (particle size up to 3 mm). Cable length - 10 m. Power consumption - 450 W. Low noise at work. Weight - 4.3 kg.	6.6 m³/h 6 m w.c. Art. 5 m	6600 rub.
LEBERG GS550	Pump for pumping heavily polluted water (faecal type), up to 25% of pollution from the total volume and with impurities up to 35 mm in diameter. Built-in protection systems, float automatics. Cable length - 10 m. Power consumption - 500 W. Weight - 4.2 kg.	12 m³/hour 8 m w.c. Art. 3m	3900 rub.

Barrel pumps

The article has already mentioned that the best way to irrigate crops is from containers in which the water has settled, heated up, and dissolved gases have come out of it. Proper placement of containers (barrels) on the site will make it easy to irrigate anywhere, without using excessively long hoses. You can fill barrels from a well, well, hydrant or natural reservoir using any of the pumps mentioned above. But for direct watering, special devices that are designed specifically for these purposes are very convenient.

Usually these are compact in size and small in weight pumps that are easy to carry from place to place for any person. Structurally, they are very similar to submersible drainage ones - they are made according to the same scheme, they have a similar float-operated automation device that monitors the level of filling of the tank.

Despite their small dimensions, such units give quite tidal performance and generated pressure. However, watering a site from barrels does not involve long hoses and lifting water from a considerable depth, and all the pressure, in principle, is spent on overcoming the resistance of horizontal sections and it is quite enough for any irrigation devices - guns, sprayers, sprinklers, etc. Many pumps of this type are even equipped with valve-type taps (item 1) so that it is possible to fine-tune the pressure required for irrigation.

As a rule, all of them have a universal fitting (pos. 2) at the outlet for connecting a quick-detachable hose system, which greatly simplifies preparatory work before watering. Of particular convenience is the device for hanging the pump over the edge of the barrel. This can be a rod of a certain length or telescopic (pos. 3), which is also the pump outlet. At the end of it, a bend is made, for which the apparatus is suspended from the side of the tank. Adjusting the length of the rod simultaneously changes the installation depth of the pump.

As a rule, such pumps are designed to pump fairly clean water, with minor impurities, so they often have a built-in sponge filter.

Many manufacturers complete their models with a coil of high-quality hose, adapters, spray guns - you get a universal set suitable for a variety of watering.

Of course, such pumps are equipped with float water level sensors, which excludes their operation "dry". Moreover, special pressure sensors will turn on the pump only as needed - when watering is actually carried out. When the spray gun is switched off, for example, the pump also stops working and will restart automatically when the water flow is opened again.

Of the shortcomings, it can only be noted that such pumps are usually not designed for continuous operation. Although they are, in fact, "drainers", it is still not worth using them to pump a large volume of water. And for watering the garden, too much duration will not be required.

Model	Brief description of the model	Productivity, pressure generated, maximum immersion depth	average price
GARDENA 4000/2 CLASSIC	Two-stage impeller for high performance. Telescopic adjustable suspension bar. Universal fitting-adapter. Built-in water filtration system. Control and stop valves. Power - 500 watts. Cable length - 10 m. Weight - 4.2 kg.	4000 l/h 20 m water Art. 5 m	5500 rub.
"Caliber NPC-350B"	Barrel drainage pump for clean and contaminated (particles up to 5 mm) water. Replaceable foam filter on the water intake. Float mechanism of automation. Telescopic shaft. Universal fitting - "quick release". Power - 350 watts. Weight - h kg.	3000 l/h 10 m water Art. 5 m	3100 rub.
Karcher BP 1 Barrel	Model with manual and automatic (as the irrigation device is turned on) operating modes. Instead of a rigid rod - a flexible hose, with the ability to adjust the height of the device for attachment to the edge of the barrel. For pure water (up to 1 mm). Weight - 5.6 kg. Power - 400 watts.	3780 l/h 11 m water Art. 7 m	6200 rub.
ZUBR ZNPB-300	Barrel pump for clean water (impurities not more than 0.5 mm). Telescopic rod. Float automation system. Power consumption - 300 W. Weight - 4 kg.	2460 l/h, 9 m w.c. Art. 5 m	3950 rub.

Video: system for watering the garden from the barrel "Karcher"

The reader may have questions about what technique to use for drip irrigation. By and large, any of the types of pumps discussed in the article can be used. However, the exact choice of a specific model should still be tied to the features of the drip irrigation system being created. Such a system, if properly organized, is quite complex and requires a separate in-depth consideration, which is beyond the scope of this publication.