Drainage pumps with a minimum level of pumping water. How to choose a drainage pump? Performance is the most important aspect

Drainage pumps are used when you need to quickly pump out a large amount of dirty liquid. Doing it manually is a bad decision, because it will take you too long to work. And the result won't impress either. It is better to choose a good drainer that will cope with the same tasks, but much faster.

This article will discuss the types of drainage pumps, their differences and features, as well as provide recommendations on how to choose a drainage pump for domestic use.

1 Types and their differences

Depending on the design features, all drainage pumps are divided into two categories: submersible and surface.

The submersible drain works only when completely submerged in water, as it requires constant external cooling of the power unit. Such devices have a lower water intake system, which makes their use very convenient for cleaning a well with your own hands, or for pumping out deep sources.

As a rule, submersible devices have better technical characteristics in terms of power and pressure than surface drains, since the submersible unit operates at great depths and needs a powerful drive to push water out.

The main advantages of submersible pumps include compact size and light weight, which allows you to easily install it on the bottom of the source (for example, Whirlwind 1100N weighs only 7 kg, and this is a pump from the initial price category, whose technical characteristics are far from ideal).

Also, noiselessness can be attributed to the advantages of such devices, since the sound of the drive is muffled by a layer of water, under which there is a submersible pump.

Submersible-type drains are more durable than surface devices, however, their repair is carried out much more often, since the device is constantly exposed to the aggressive effects of water and the pollution present in it, while repairing them with your own hands is quite difficult, since due to disassembly of the case, its tightness is violated.

In general, the purchase of a submersible drainage pump for a summer residence is justified only if there are clear goals for its use, since such a device has much less versatility than a surface drainage pump. Attention should be paid to Karcher SDP 5000 and Karcher SDP 18000LS.

Depending on the functional purpose, fecal pumps can be distinguished from the group of submersible drainage units, which are used for do-it-yourself pumping of septic tanks, cesspools, and drains with a large amount of mechanical pollution. The highest quality fecal pumps are manufactured by Pedrollo, Grundfos and Karcher.

Surface drains are much more convenient to use, due to the fact that they do not need to be constantly lowered and removed from the source with their own hands. However, they do not provide the necessary efficiency for pumping water from deep sources.

The maximum immersion depth for the most popular pumps on the market from the middle price category is as follows: Caliber NPTs 400D - 8 meters, Whirlwind 1100N - 10 meters.

In principle, this depth is more than enough for giving, and any domestic use. If the power of the surface drainage is not enough, then you need to pay attention to a centrifugal pump designed for pumping dirty water.

The advantages of submersible devices also include a long service life, due to less wear of the working part than that of submersible pumps, and simple do-it-yourself repairs. However, in order to carry out repairs, you will have to understand its design, which is not so easy.

The disadvantages are the noise during the operation of the power unit, however, in open spaces typical for summer cottages, it is almost invisible. Also, as already mentioned, their power is somewhat less than that of submersible counterparts.

2 How to choose a drainer for performance and pressure?

The key technical characteristics that should be considered when choosing a drain are its power (capacity) and pressure.

The approximate performance of the pump is determined based on the volume of water that it will pump out. So, if you need to drain a tank with a volume of 13 cubic meters, then a pump with a capacity of 4.2 m3 / h (take for example the PN-1100N Whirlwind) will do this in three hours. For summer cottages, pumps with a capacity of 5-10 m3 / h are the best option.

The pressure characteristics of the device should depend on how far water is to be transported, or how deep it needs to be raised from a source.

In practice, ten meters of horizontal water supply is equal to one meter of its rise, which means the following: if a centrifugal pump has a head of 50 m (the same Vortex PN-1100N), then it will be able to raise water from a source 50 m deep, or pump it 500 m horizontally.

Consider how to choose a drainage pump for additional parameters. It is recommended to give preference to products whose body is made of stainless steel or cast iron. They, of course, will cost more than plastic counterparts, but the quality of the case directly affects the life of the unit.

This is especially true for submersible drains, which are constantly under the aggressive influence of the working environment.

Keep in mind that in case of deformation or malfunction of the metal case, you can repair it yourself by soldering or welding the damage, but if the plastic case breaks, the only thing left is to use the pump as a donor of spare parts for the new device.

Another important factor is the material of the impeller blades of the pump. They can be made of stainless steel or special technical polymers. It's the opposite here: stainless steel wheels in practice have a high wear rate, and therefore pumps equipped with them are cheaper.

Technopolymer impellers are made with special additives that make them resistant to mechanical damage and corrosion. The only minus of plastic, again, is repair. Repairing such materials will certainly put you in a difficult position, which must be taken into account without fail.

Be sure to choose those drains that are equipped with a float switch. The “float” automatically turns off the pump when the water level drops below a predetermined level, which protects the drain from running dry, and turns on the device when the water is restored.

Automation does not require turning the pump on and off with your own hands, which allows it to function normally during your absence.

It is also important to choose a pump according to the contamination of the water for which it will be used. The technical documentation for each drainer indicates what size impurities it can work with:

From 25 mm to 38 mm - these pumps are perfect for pumping heavily polluted water - rain, melt and for cleaning wells and wells;
From 25 to 5 mm - for medium-polluted water, usually such devices are used for watering vegetable gardens with technical water - the best option for giving;
Up to 5 mm - for drainage of clean water, for example for pumping pools.

2.1 Who manufactures the drainage pumps?

Market analysis shows that the most popular devices for domestic use are pumps of domestic production "Caliber". These devices have an optimal price-quality ratio, making Kalibr drains an excellent option for a universal pump for a summer residence or a private house.

The device of the drainage pump "Caliber" includes a centrifugal drive, which guarantees it high performance - a 400 W unit ("Caliber NPTs400D") has a pressure of 8 meters and produces 6.9 cubic meters of water per hour.

The advantages of Caliber pumps include endurance, which distinguishes them from competitors. Drainage "Caliber" without problems cope with water, which contains a large amount of mechanical impurities, which allows them to be used not only for pumping water, but also for cleaning wells and shallow wells.

An important factor in the popularity of Caliber pumps is also the simplicity of the design, which allows them to be repaired by themselves.

With the mass distribution of air conditioners, the market for compact pumps, which are used to pump out accumulated condensate, has greatly developed. We decided to compare the leaders in this market segment to find out which compact drainage pump is the best today.

For comparison, Sauermann Si 2750 devices and a Mini Orange pump from Aspen were selected. They have the best technical characteristics in their price range:

Cost: Sauermann Si 2750 wins in price, they ask for about three and a half thousand, while Mini Orange will cost you 5 thousand rubles.
Power: Mini Orange is the leader in terms of performance, this pump at maximum load is capable of delivering about 14 l / h, while the Sauermann 2750 is only 10 liters. In other matters, for household air conditioners, whose power rarely exceeds 20 kW, both devices are perfect.
Head: suction lift for Mini Orange - 8 meters, for Sauermann 2750 - 2.5 m.
Noisiness: Sauermann 2750 when pumping water 1 meter creates a noise of 32 dB, and Mini Orange only 23 dB. Orange leadership.
Weight and dimensions: the Sauermann 2750 and Mini Orange are approximately the same in size, the weight is also almost identical - both devices weigh within 300 grams
Mini Orange also wins in terms of maximum injection, which in this device is 10 m, while Sauermann 2750 has only 6 m.

As you can see, the Mini Orange surpasses the Sauermann 2750 in almost all parameters, but we assure you that in practice you will not notice significant differences between them.

Following the recommendations of our portal, many suburban homeowners are already on the site and know. We continue the series of articles on drainage. Last time we explained the nuances, today we will tell you how to choose the right drainage pump.

From our material you will learn:

What is a sump pump for?
How is it different from fecal matter?
What are the types of drainage pumps.
How to calculate the required amount of pressure.
Which hose to connect.

What is a sump pump for?

Owners of suburban areas are often faced with the need for drainage. This problem is usually exacerbated in the spring - a time of heavy snowmelt. Excess water leads to flooding of the site, ditches, basements and has a detrimental effect on the root system of many plants. In this situation, a drainage pump comes to the rescue - equipment designed to pump out polluted water and sewage. With the help of a “drainer”, it is possible to drain a pit flooded by showers dug under the foundation, “throw off” excess water over the territory of the site, save the cellar from flooding, and eliminate the consequences of a pipeline break in the basement.

Moreover, as the experience of our users shows, the device will help out even if a full-fledged drainage system has not yet been installed on the site.

Barav FORUMHOUSE user, Moscow.

I needed a “drainer” to pump out water from the site and pump out a well 5 meters deep. The pump chose the most common - without the "bells and whistles". When buying it, I was guided by the principle: price-quality. Anticipating the question of why I decided to pump out water to the pumps, and not to equip a full-fledged drainage system on the site and, thereby, save it from flooding, I will answer: doing something typ-blunder is more expensive for yourself. I made a drainage project and calculated that the estimate would exceed 150 thousand rubles. So far, he has postponed its construction "for later", and do, like everyone else - "budget" drainage - bury money in the ground. I do not want to redo it in 2-3 years.

Guided by these principles, Barav decided as a temporary measure, before the start of full-fledged drainage, to divert water with a drainage pump. To do this, he additionally purchased a hose 25 meters long, with a section of 1 inch and a reinforced rigid hose 6 meters long, with a section of 1 ½ inches. According to our user, he had to fiddle with the connection of the hose, because. the hose did not fit on the fitting. Eventually Baravu managed to mount a system 31 meters long, with which he decided to pump out water.

He dropped the "drainer" into the deepest water spot on the site and turned it on. The result of the work is visible in the following photos.

flooded area

Working drain pump

The result of the work

Barav

I "chased" the pump in full. He pumped everything out to them - both the drainage well, and the neighbor's basement, and drains from the kitchen. He "plowed" for 5-8 hours a day all summer and autumn. Moreover, it worked so silently that I sometimes approached and checked if it turned off.

In total, the drainer worked for 7 months. This is about 800 hours and during this time it pumped about 8,000,000 liters of water, and the device had to pump out even a mixture of water and clay with sand from the pit.

Barav

I have run the pump in the most severe conditions, in very dirty water, even with "dry running", which caused it to break. The “autopsy” showed that the engine was flooded with water, which got there due to the fact that the air outlet hole was clogged (it is located under the float mount), which had to be periodically cleaned.

Despite this ending, our user decided to buy a new "drainer", but now - strictly adhere to the rules of its operation.

Basic principles for choosing a drainage pump

We know that the sump pump is designed for pumping contaminated water from ditches, pits, drainage wells, basements, etc. It would seem that now it remains only to go to the hardware store and buy it. It is here that there are several "pitfalls" that you should be aware of in advance. The first of them - the market offers a huge selection of drainage equipment. To select the device that is right for you, you need to narrow down your search criteria. To do this, you need to answer the following questions.

What is the difference between a drainage pump and a fecal pump

Indeed: both drainage and fecal are designed for pumping dirty water and sewage. Those. - liquids containing various inclusions. So why not pump out both the septic tank and the pit in the foundation pit with one. Not so simple. The purpose of the pump depends on the composition of the effluents, their temperature, and chemical composition. Let's consider this aspect in more detail.

Drainage pumps designed for pumping wastewater containing solid impurities(inclusions) of a certain size - usually from 5 to 40 or more millimeters. Permissible size solid particles which can pass through the mechanism, spelled out in the instructions. In order to protect the mechanism from the ingress of large solid objects - stones, gravel, etc., larger than the size established by the design, the suction part of the device is protected by a metal mesh.

Fecal pump(if it is equipped with chopping knives intended only for grinding organic garbage and fibrous inclusions) is used for pumping water, free of solids, because it does not have a filter that delays such inclusions.

Most of the drainage pumps are designed for pumping water with a temperature not exceeding 35-40°C. Therefore, if the device is needed to pump out hot drains (from the kitchen, bath, bath, dishwasher), or you need to drain the basement flooded with hot water due to a breakthrough in the hot water supply system, you must choose a “drainer” designed to work in such “hard » conditions. Those. with a temperature that allows it to work at 70 ° C and above degrees.

It is important to take into account the chemical parameters of the pumped water. If the pump will operate in an aggressive environment, the materials from which it is made are subject to increased corrosion-resistant requirements. There are also drainage and fecal devices designed for pumping out fecal and waste water containing solids.

So Read the instructions carefully before buying - for what, in what water and what inclusions (particle size) the device can pump.

You should not try to use the "drainage" as an element of the water supply system of a country house, because. pumps of this type do not create sufficient pressure.

Remember that submersible pumps designed to work in clean water (for supplying water from a well) are not designed to work with dirty sewage.

What are the types of drainage pumps

To simplify the choice, they can be divided into 2 groups:

Working on the surface.
Submersible.

From the names it is clear where the "drainage" works. Surface is placed next to the place of pumping water. Then a hose is lowered to the bottom of the well or drain pit, through which the waste is pumped out. The device operates in automatic mode. When the liquid level rises to a certain value, due to the float (rising along with the liquid), the pump turns on and begins to pump out water. But submersible devices, as the most convenient to use, have become more widespread. They sink completely into the pumped liquid. Unlike a surface “drainer”, such a pump is not afraid of precipitation and moisture, which means it is better suited for working on the site and is not affected by negative atmospheric phenomena.

Important: the submersible pump (its motor) is cooled by the liquid in which it operates. To protect against "dry running" - "work without water", submersible pumps are equipped with float switches. The float switches the device off and on when the liquid reaches a certain level.

When installing the pump, make sure that the float has a so-called. free workflow. It did not cling to the walls of the well, branches, edges of the pit, etc. Another important characteristic of the "drainer" is the level of emptying (it is prescribed in the instructions). Those. what level of water can remain at the bottom of the tank, after which the pump will stop pumping it out. This value can be ≈ 20-50 mm. A device with such parameters can be in demand if it is necessary to drain small flooded rooms and containers almost “dry”. Pumped water should not contain large abrasive particles.

What are the main criteria for choosing a drainage pump

When choosing a "drainer" you need to pay attention to two main characteristics:

Capacity l/min or m³/h. Those. the amount of liquid pumped in a given time.
Head. This value indicates to what height (height difference between the installation site and the discharge point) wastewater can be pumped out. This parameter affects the ability to pump wastewater over a certain distance.

Let's consider the second parameter in more detail.

xxxl FORUMHOUSE user

I want to buy a sump pump. I need it to pump water from the pool. The height of the pool is about 1 meter. I began to study the technical characteristics of the pump I liked and saw the following parameter: the maximum pressure is 14 meters. I want to understand what this parameter means, and how far the device can drain water.

Hence: for the calculation we need to translate the vertical into the horizontal. Approximately the horizontal head loss ratio will be 1:10. Those. 1 meter vertical head is equal to 10 m horizontal.

A drainage pump is a unit that is used by residents of country houses and summer cottages to pump out sewage and groundwater that flood basements, inspection pits in garages, trenches and living quarters. The compact drainage pump allows you to quickly get rid of a large volume of water from various artificial and natural reservoirs. Below we consider the device of the unit, the features of its choice and self-repair.

Drain pump device - device design

One of the main advantages of the drainage pump is the simplicity of its design. The unit for pumping water from a well consists of a housing, an electric motor and a pump unit. The last element is responsible for the uninterrupted supply and pumping of fluid. Vanes or an impeller are mounted on the pump shaft. The shaft is fixed in the bearing assemblies of the device.

The motor device includes a rotor and a stator, and the design of the pump unit includes a suction pipe and a discharge pipe. The automatic control unit consists of an overheat protection relay, a temperature controller and an automatic switch.

The blades of the device are made of a durable technical polymer that is resistant to corrosion and mechanical damage. Some modern dirty water models are equipped with steel blades, which are more reliable than polymer parts.

All pump parts are housed in a durable metal case. The body of the submersible drainage unit is made of stainless steel, and the body of the surface unit is made of cast iron or composite alloys.

The principle of operation of the drainage pump

The drain pump works on a very simple principle. Immediately after connecting the unit to the mains, the engine starts, which drives the shaft with blades. Water under high pressure enters the device through the suction pipe, after which the blades act on it. The latter push the liquid through the pump assembly into the discharge pipe. From there, the water is pushed out into the outlet pipe.

For more efficient operation of the pump, the water must contain a minimum of solid particles. It is possible to use a sewage unit in a private house only if the diameter of the fractions in the composition of the water does not exceed 1.2 cm.

The immersion depth of the drainage device is also of great importance. In practice, the shallower the depth, the better, because in extreme cases it will be easier to pull out the equipment and fix the problem in a timely manner.

Drainage and fecal units are quite similar to each other, both in design and in principle of operation. However, there are a number of differences between them.

The main difference between a drainage pump and a fecal pump is the size of the particles that can get inside the device. Most drainage devices are designed for clean water with fractions, the size of which should not exceed 1.2 cm.

The fecal aggregates can be used for contaminated water containing solids with a diameter of more than 10 cm. A more powerful fecal pump for industrial needs is able to absorb particles with a diameter of more than 12 cm.

The second difference lies in the sources for which both types of equipment can be used. Drainage units are intended for the basement, for barrels and other tanks in which more or less clean water accumulates. Often, such units are used for a pool located on the street. Fecal appliances are used only for cleaning cesspools with a lot of sand, lime and debris.

Drainage pump - how to choose the right unit?

When choosing a drainage pump for a summer residence or a private house, certain criteria should be followed. Among the most important factors it is necessary to highlight:

Operating conditions of the device - when buying, you need to remember that the efficiency and duration of the drainage pump depends on the degree of water pollution. Dirt, lime and sand can quickly disable even the most powerful household appliances;
The pressure created by the device - when calculating, you need to remember that one meter vertically is equal to 10 meters horizontally. If the depth of the basement or inspection hole is more than 5 meters, then the pump head according to the passport should be approximately 45–50 m;
Dimensions and noise level during operation - for pumping water from a small basement, a small pump will be best. The mini unit operates quietly, is reliable, easy to connect and durable;
The presence of protection against work on a "dry run" - experts advise buying equipment with a built-in float. With the necessary automation, it is better to choose units equipped with a water flow switch and with a vertical switch;
Pump drive - when buying a hand-held device, you should remember that pumping water with it will take a lot of time and effort. Units with electric motors will be better and easier to operate. With high performance, they consume a minimum of electricity, are easy to install, operate and maintain.

These factors will help determine the appropriate option for use in everyday life and household, and not overpay for it.

The drainage pump is buzzing, but does not pump water - we determine and fix the problem

One of the most common drain pump problems is that the unit does not pump water, but continues to hum. Among the most common causes of this malfunction, it should be noted:

Too low water level in the source;
Short circuit of the motor in the area between the turns;
Mechanical failure;
Air valve failure.

Each drainage pump is installed only under water - this is a prerequisite for the operation of equipment of this type. To protect the device from running dry, it is equipped with a built-in float that automatically turns off the device in the absence of the required amount of liquid.

This function is made possible by a ball located inside the float switch. As soon as there is less water, the ball changes position, opening the contacts in the electrical circuit of the device. Sometimes the pump does not work, but continues to buzz due to a change in cavitation mode. The latter is formed if the unit has an excess of power, due to which the liquid does not always have time to seep through the blades on the impeller. In this case, the device must be lowered a couple of meters deeper.

Another cause of failure is the interturn circuit. This is easy to find out by starting the motor - if it starts to hum and the pump cable heats up, then the reason lies precisely in the circuit. This problem is formed in connection with the operation of the unit on a “dry run”, since the motor is cooled precisely due to contact with the pumped water. If the motor overheats, then this causes a violation of the integrity of the insulation of its internal winding.

Mechanical failure may occur while the motor is running. For example, damage to the impeller blades causes the unit to hum, but not pump out water. To test the pump, you need to disconnect it from the power supply and pull it out of the water source. Next, you need to try to scroll the impeller - if it does not rotate, then you will need to disassemble the unit.

Some drain pumps are equipped with additional air release valves. The ball placed in the valve sometimes sticks if the water to be pumped out is too dirty. The sticking of this ball complicates the exit of air, due to which the engine starts to idle. To eliminate the malfunction, you need to lower the unit into clean water and let it work in such an environment for about half an hour.

Often, when starting the pump, the circuit breaker may turn off, which leads to the melting of the cable supplying the unit. This situation occurs due to the jamming of the shaft between the bearings or when the motor overheats. In this case, a sharp smell of burnt wiring will be felt.

Another cause of failure lies in a clogged filter. As a result, the pressure of the fluid that enters the hose drops sharply. Identifying this problem is quite simple - in this case, the pump will buzz and heat up a lot. To solve the problem with your own hands, you need to dismantle the filter, clean or replace it. You will also need to check all connections for depressurization. If necessary, the joints will need to be treated with a special sealant and FUM tape.

In the life of the owner of a private house, there are many such trifles that a resident of a city apartment does not even know about, one of which is a drainage pump. This device is used for pumping water: from a pond, pool, fountain, basement. Although it is not used every day, it is indispensable. On the Internet and in stores you can find thousands of offers for the purchase of a drainage pump. Various companies offer equipment that differs in appearance, size and technical characteristics. This article will help choose a drain pump which will exactly match your requirements. The right choice will not only extend the life of the equipment, but also save money by avoiding overpaying for unnecessary features.

Why is a sump pump needed?

You need to start with this question, because in order to know the necessary technical parameters and functions of the device, you need to understand what task it performs and in what conditions it will work. There can be many situations when a drainage pump is needed. Here are the most typical ones:

Drain the fountain tank for repairs;
Pump out rain or melt water from the drainage well;
After a pipe break, water has to be pumped out of the basement;
The cellar was flooded with spring floods - it is necessary to remove the water;
To irrigate the site, you need to pump water from the nearest natural reservoir.

As already mentioned, this pump is used to pump out water - clean water. The above cases assume that the water is relatively clean and does not contain large amounts of large particles, silt, sand or dirt. Otherwise, you will have to purchase a fecal pump - but this is a different type of equipment.

Manufacturers of some types of drainage pumps indicate in the technical specifications that the pump can pump dirty water. It also determines the size of the particles that the equipment is able to filter. If you intend to pump contaminated water, you need to purchase just such a pump. But you can not abuse the filtering capabilities - this can disable the equipment.

What are drainage pumps

All such pumping equipment can be conditionally divided into two large groups:

Surface pumps;
Submersible pumps.

Surface pumps are not demanding in installation: the equipment is installed on any flat surface near the tank, with which it is connected by a drainage pipe. It is capable of pumping water from a shallow depth, up to 10 m. Maintenance is quite simple and includes cleaning and lubricating parts. A significant disadvantage of this pump is the noise of operation.

Submersible pumps, as the name implies, are partially or completely submerged in water in the working position. They do not require complex installation, thanks to their small size and weight they are easy to carry, so the submersible pump will cope with any drainage task anywhere in your home or yard. It is easy to operate and maintain, reliable and durable. The advantage of this equipment is its noiselessness. Often submersible pumps are able to pump water from a greater depth than surface pumps. For domestic purposes, this type of equipment is most often used.

Device and principle of operation

The submersible drainage pump has a monoblock structure. An electric motor and a pump unit are placed in a hermetically sealed case made of plastic or stainless steel. The electric motor rotates the impeller, which creates a vacuum in the pump assembly, which leads to the movement of the liquid.

The impeller is in constant contact with water, so the material from which it is made is important. The impeller blades can be made of stainless steel or polymer. Traditionally, metal blades are considered more durable and more expensive. What you choose depends on the operating conditions of the pump in your area. For frequent operation and pumping large volumes, it is better choose a drain pump with steel blades.

To protect the electrical part, the pump is equipped with a float switch and a temperature relay. The float switch monitors the level of the working fluid and controls the pump: at the maximum level it turns on, and at the minimum it turns off. This protects the pump from emergency running dry. The temperature relay monitors the heating of the engine and, when the critical temperature is reached, disconnects the pump from the power supply, preventing the motor from overheating.

Pump selection according to technical characteristics

Drainage pumps are characterized by two main parameters: pressure and performance. Let's start with the choice of performance, or, as it is otherwise called, throughput. This parameter indicates the ability of the drainage pump to pump out a certain volume of liquid per unit time and is measured in cubic meters per hour (m 3 / h). You should choose, focusing on the maximum load. For example, the pump will be used to pump water from a drainage well with a diameter of 1.5 meters and a depth of 6 meters. By mathematical calculations, we determine the volume of the well, which is about 10 m 3. At maximum load, the entire volume of liquid must be pumped out in 2 hours. Dividing the volume by the time, we obtain the estimated pump capacity - 5 m 3 / h. If the pump successfully copes with its task at maximum load, then it will cope with simpler tasks even more so.

Now we will select the drainage pump by pressure. This value characterizes the ability of the pump to raise water to a height and is measured in meters (m). If, according to the passport, the pump head is 10 meters, then it can raise water to a height of no more than 10 meters. When determining the magnitude of the pressure, one should take into account not only the vertical water supply system, but also the horizontal one, because energy is also spent on pumping water through horizontally laid pipes, although in a much smaller amount. The approximate ratio of pressure in the horizontal plane is as follows: in order to pump water through 10 meters of a horizontal pipe, 1 meter of pressure is needed.

In our case, the submersible drainage pump is installed at a depth of 6 meters, and the water is discharged into the rain sewer, the receiver of which is located at a distance of 20 meters from the drainage well. To raise water to the surface, a pressure of 6 meters is required, and to pump it into a rain sewer - 2 meters (remember the ratio of 10 meters of a horizontal pipe to 1 meter of pressure). So, to complete our task, the pump must have a head of 8 meters.

Conclusion: focusing on the calculated value of productivity and pressure, for specific conditions of maximum load on the equipment, you should choose a drainage pump with a capacity of 5 m 3 / h and a pressure of 8 meters. If you choose a pump with a lower capacity, it will not cope with the task of pumping out water within a given time, and if you make a mistake in choosing the pressure value, then the pump will not be able to raise water to the desired height.

What else you need to consider when operating a drainage pump

In order for the dirt that has settled to the bottom not to clog the parts of the pump, it should be installed at a certain distance from the bottom. If the pump is going to be constantly used for pumping dirty water, equipment with a top intake can be purchased. This will allow you to disassemble the pump less often and clean the filter element, and will also have a positive effect on the duration of the unit.

When buying a drain pump, keep in mind that ordinary garden hoses will not fit it, since the diameter of the pump outlet is usually larger than the diameter of the garden hose. So, when purchasing a pump, you should take care to purchase a hose of the right size.

The purchase of a drainage pump allows you to solve many problems that face the owners of private houses. In addition, this equipment is not expensive. Pumps of domestic firms are traditionally a little cheaper than imported ones. When purchasing a drainage pump, be guided by the compliance with the technical specifications and reputation of the manufacturer. In this case, the purchased equipment will faithfully serve for many years.

Drainage pumps pump out water for us from pits, low-yield wells, basements, tanks for irrigation and cleaning of territories. On a suburban area, they have a lot of important functions that drainers can handle only with proper selection. Agree, there is little benefit from a device that is not used due to technical limitations.

We tell readers of the site in detail how to choose a drainage pump. We analyze what kind is required to perform a certain job. Here you will learn all the subtleties and technical criteria, according to which a suitable drainage pump model is determined.

The article presented for review lists all the factors that ensure an error-free choice. Popular drainage pumps are given as an example and described in detail, the quality of which has been verified by practice. The information content of the text is supplemented by photo and video applications.

Initially, these devices were created for pumping water from basements flooded with water. Later, the area of use expanded. Modern models are designed for pumping lightly contaminated liquids from pits, wells, pools, pumping and cleaning wells.

In addition, they are used in production, included in the technological process. Most devices are capable of pumping liquids with impurities of about 10 mm in size.

Drainage pumps are specific equipment designed for a rather narrow range of work. It is not recommended to use it for other purposes. Despite the fact that drainers are used in shaft wells, they are not intended for permanent work in them.

The devices cannot work as a fecal pump either, although some "craftsmen" are trying to replace them.

Drainage pumps are designed for pumping and pumping clean or slightly contaminated liquids, can be used for draining small ponds, pumping and cleaning wells

Drainage equipment can only work with lightly contaminated liquids. The amount of solid impurities, depending on the type of apparatus, varies from 3 to 40 mm.