How to choose a drainage pump: a review of options + rating of the best equipment on the market

Drainage pumps entrusted huge front works. The tireless equipment pumps out water for us from pits, marginal wells, basements, tanks for irrigation and cleaning of territories. The drainage in a country plot has a lot of important functions that it can cope with only with proper selection. Agree, some benefits from the device, which is not used due to technical limitations.

We thoroughly tell the readers of the site how to choose a drainage pump. We understand what kind of need to perform a particular job. You will learn from us all the subtleties and technical criteria according to which a suitable model of a drainage pump is determined.

The author of the article carefully lists all the factors on the basis of which an unmistakable choice can be made. He gives an example and describes in detail the popular drainage pumps, the quality of which has been verified by practice.The information content of the text significantly increase the photo and video applications.

The design and principle of operation of the equipment

Initially, these devices were created for pumping water from basements flooded with water. Later, the use of devices has expanded. Modern models are designed for pumping low-contaminated fluids from pits, wells, pools, buildup and cleaning of wells.

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

Drainage pumps are specific equipment designed for a fairly narrow range of work. Using it for other purposes is not recommended. Despite the fact that drainage systems are used when cleaning shallow wells and mine wells, they are not intended for permanent work in them. The devices cannot work as a fecal pump, although some “craftsmen” try to replace them.

How to choose a drainage pump
Drainage pumps are designed for pumping out and pumping clean or slightly polluted liquids; they can be used for draining small ponds, pumping and cleaning wells

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

Whereas fecal pumps operate in aggressive liquids with the complete absence of solid inclusions. They are necessarily equipped with shredders, which with the help of special blades completely eliminate large contaminants.

If we consider the device device in the most general form, it consists of several elements:

  • Electrical engine.
  • Impeller located on the shaft. Responsible for the movement of fluid inside the device. Can be placed directly on the engine or at some distance from it.
  • Pump knot.It is equipped with a suction nozzle. The liquid enters the device through the openings in the nozzle. Their diameter determines the size of impurities with which the device can operate.
  • Hermetic case. Inside it are all the work items.
  • Circuit breaker.Turns on and off depending on the level of the liquid. This prevents flooding of the equipment or its so-called “dry run”.

Diagram of a typical pump:

Drainage pump
The design of the drainage pump includes several basic elements, which in the form of a diagram are shown in the figure.

When the device is activated, the electric motor rotating the shaft with the impeller starts up. A zone with rarefied air forms around the moving blades, which reduces the pressure inside the chamber.

Liquid is drawn in through the nozzles with holes and goes inside the device. Here, under the influence of centrifugal force, it is pushed to the outlet, from where it enters the pipe or the discharge hose.

For normal operation of the pump, it is important that the amount of solid impurities inside the chamber does not exceed 10% of its volume. Another nuance. Standard drains are not designed for pumping hot fluids.

They can do this for a short time, as the engine of the device is cooled, giving off heat to the pumped liquid. If you need to constantly pump hot water, you should choose a special model.

Types of drainage pumps

Depending on the installation site, two types of drainage equipment are distinguished - surface and submersible.

Surface pumping devices

Designed for installation on the edge of a tank filled with liquid for pumping. The inlet is lowered to the bottom of the tank, where it draws water with impurities.

Such a device is able to function without human intervention, for which a float mechanism that reacts to the level of the pumped liquid is connected to it. When it is raised, the float pops up, which is a signal to turn on the equipment and vice versa.

Drainage pumps
Surface drainage pumps or, as they are also called, self-priming pumps are installed on the edge of the pumped tank. Devices are portable and compact.

Surface devices are easy to maintain and mobile. They are easy enough to transport and install in a new place. All equipment components are available, so their repair is not difficult. Surface devices often have average power. Can be used in pumping stations connected to wells or boreholes.

Submersible Drainage Pumps

Pumps of this type are designed to work directly in the pumped liquid, therefore, must be fully immersed in the tank.The main difference between the equipment is the absence of a suction nozzle.

The liquid enters the pump through special holes located in the bottom of the structure. To protect the device's impeller from large solid impurities, a mesh filter is mounted here.

Submersible Drainage Pump
Submersible pumps are designed to work in the pumped liquid, so their body must be tight and very durable

Devices function automatically, turn on only when a certain volume of liquid accumulates. The equipment is necessarily equipped with enhanced electrical insulation, which is explained by its operation in a liquid medium. The great advantage of submersible pumps is their high power and performance, noiselessness, durability, and safe operation.

An overview of a typical submersible drainage pump on the example of the ASP 900 D INOX model:

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Photos of
Model ASP 900 D INOX brand AURORA
Model ASP 900 D INOX brand AURORA
Suction filtering holes
Suction filtering holes
Motor and start capacitor
Motor and start capacitor
Motor power submersible pump
Motor power submersible pump
Pump impeller
Pump impeller
Centrifugal pump - main suction device
Centrifugal pump - main suction device
Float switch - part of automatic system
Float switch - part of automatic system
Power and cable length
Power and cable length

The mechanism is used for pumping water from wells, ponds, basements, etc. The “weak” position of the device is holes in the bottom, which are often silted up, since the device is installed at the bottom of a reservoir or tank. This drawback is inherent in models with suction openings in the upper part of the housing.

Criteria for choosing the right equipment

It is rather simple to choose the drainage pump. Be sure to consider several important criteria.

Characteristics of the pumped medium

Before buying a pump, you should determine which liquid it will have to pump out. It should be relatively clean, without stones, without a high content of dirt or sand, and also without sediment from silt.

These can be flooded rooms or basements, tanks filled with rainwater, wells, ponds, etc. If the pump sinks into the pond, it should stand on a hard bottom.

Submersible Drainage Pump
For each model of the submersible drainage pump in the accompanying technical documentation indicates the maximum size of impurities that the device can skip without loss of performance

Therefore, it is installed in a suitable-sized vat, bucket, or on a special base plate. Each model is designed to work in a specific environment, that is, it specifies the maximum size of impurities dissolved in a liquid that the mechanism can skip without reducing its efficiency.

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Photos of
Basement building after flooding
Basement building after flooding
Pumping dirty water from the storage well
Pumping dirty water from the storage well
Pumping or replacement of water in the pool
Pumping or replacement of water in the pool
Flooding of land after the rains
Flooding of land after the rains

Depending on the contamination of the fluid, all the drains can be divided into groups:

  • For slightly polluted or pure liquids with a size of impurities up to 5 mm.
  • For medium contamination liquids with inclusions not exceeding 25 mm.
  • For polluted, thawed or rainwater. The allowable particle size of pollution from 25 to 38 mm.

In addition to the size of impurities, it is also important to take into account the temperature and chemical composition of the pumped liquid. Aggressive compounds can damage the pump, so you need to know exactly what its elements are made of.

Used in the manufacture of materials

The service life of a drainage pump directly depends on the material used to manufacture its elements.The case of the device can be made of plastic or metal.

In the first case, the cost of the device will be lower, which is more attractive to the buyer. However, the plastic case is not sufficiently resistant to mechanical damage and often crack or deform.

Drainage pump
For a drainage pump, it is optimal to have a metal casing. It can withstand quite large loads and does not crack. In addition, it is almost always maintainable.

In this case, it is no longer repairable. Metal housings are more durable and maintainable, so pumps in this design last much longer. One of the best materials for the body is cast iron and stainless steel, which can work in almost any environment. Another important detail is the material from which the pump blades are made.

They can be made of stainless steel or special technical polymer. Preferred in this case would be the second option. Special impurities that are present in the composition of the polymer, make it more resistant to aggressive media and mechanical stress. A significant drawback - they can not be repaired.The blades of metal wear faster than plastic, so cheaper.

Type of circuit breaker

Almost all modern drainage pumps are equipped with automatic switches that trigger the mechanism to achieve a given level of pumped liquid. The device can be:

  • Electronic embedded. Quite a complex and expensive site.
  • Poplavkov. More simple, reliable and inexpensive item.

Automatic switches of any type exclude the possibility of dry running of the pump, which prevents its serious breakage.

Drainage pump
Automatic switch float type. When the liquid level rises, the pump floats up and turns on and vice versa. Extremely simple, efficient and reliable device

Drainage pump capacity

Performance refers to the amount of fluid, measured in cubic meters, that a device can pump in one hour of operation. This indicator must be indicated in the passport of the device. Determine the required performance by dividing the volume of the reservoir from which the fluid will be pumped, for the estimated time of work.

On average, a mechanism with a capacity of about 10 cubic meters is quite enough for home use. m / h For professionals, models with a capacity of 100 cu. m / h

Head of the device for pumping water

It can vary in the range from 5 to 50 m. The size of the pressure depends on the type of pump, which determines the distance to which water is drained, or the height of the pumped liquid.

These indicators are indicated in the technical documentation. Between themselves, they are correlated in a ratio of 1:10. Thus, if it is stated in the passport that the pump can lift the liquid to a height of 5 m, it means that he will be able to transfer it to a length of up to 50 m.

It is clear that these are average indicators that do not take into account any other parameters, for example, the diameter of the hose. Therefore, for clarification is to contact the seller. For the most common calculations, you can use such data.

For household models, it will be quite sufficient if the pressure indicated in the technical documentation exceeds the design pressure by 3 m. If a large inflow of water is expected or there is a lot of water, the “supply” of pressure should be greater.

Drainage pump
Performance and pressure are the most important characteristics that determine the choice of a drainage pump.Experts recommend for the exact selection of the device to use special charts developed by manufacturers

Outlet Diameter

For the most efficient operation of the pump, you must accurately select the size of the outlet nozzles. If pumping water is intended, a small diameter model is suitable: from 0.5 to 1.5 inches.

In the case of pumping out contaminated liquid, it is better to choose an 8-inch or even larger option. In addition, pipes for horizontal and vertical connections are available. It is necessary to choose a suitable model for the type.

And a few more important points. The hose that will be connected to the outlet should have a similar diameter. For domestic use, you should choose portable lightweight models. They are more mobile and convenient to use. It is worth asking and the residual level of fluid that remains after the operation of the drainage pump. If you want to pump out the water "dry", you should choose a model that leaves no more than 2 mm of liquid.

Proven brands and popular models

In the rating of drainage pumps, you can see both expensive devices and quite low-end models.Let's talk about the most popular pumping equipment from consumers.

Italian brand Pedrollo

The company declared itself in the 70s of the last century. She quickly gained popularity with the high quality of her products, which is successfully combined with an affordable price.

Today Pedrollo is one of the leaders in the production of pumps of various types. The line of drainage devices of this company is quite wide. It is possible to distinguish a particularly popular series of TOP.

Drainage pump
The case and working elements of the Pedrollo brand drainage pumps are made of a special “proprietary” technical polymer, characterized by high strength

These are drainage submersible units with an open impeller of centrifugal type. Designed for automatic operation for lifting and collecting fluid without abrasive particles. Cases of pumps of this series are made of technopolymer, reinforced with fiberglass, which gives them increased impact resistance. The impeller and suction grille are also made of technical polymer.

One of the most popular models of the series is Pedrollo TOP Vortex. As with all pumps of the TOR range, the structural elements of the device are made of a “proprietary” technopolymer.

This allows it to work in various corrosive environments and to pump not only water, but also chemical reagents. The device is designed for pumping dirty liquids and fecal waste, the size of the solid fraction in which does not exceed 20 mm.

The model is designed for continuous use, capable of operating in the mode of incomplete immersion, equipped with an emergency shutdown device. This is a fairly powerful drainage pump, extremely easy to use. It is got for removal of water from garages, cellars, pools. It can be used for watering the site and even for organizing a small fountain.

Russian pumps Dzhileks

The domestic manufacturer began to supply its products to the market in the 90s of the last century. Pumps brand Dzhileks very much in demand, thanks to its adaptation to the Russian conditions of operation.

For example, they are not so sensitive to frequent voltage drops in the network. In addition, they are of high quality, and their cost is much lower than that of imported counterparts.

Drainage pump
Drainage pumps domestic brand Dzhileks specifically designed for operation in the Russian context.They, for example, have additional protection against power surges in the network.

In addition, in our country the network of service centers Dzhileks is well developed, which guarantees the absence of problems with the repair and spare parts. Drainage pumps of this brand are represented by a ruler under the general name Drainage.

These are submersible devices of various capacities, made of special plastic or stainless steel. They can function in environments whose size of pollution is from 5 to 40 mm.

Devices differ in profitability and the impressive term of operation. One of the most popular models of the line - Drainage 200 / 10f. This is a fairly powerful pump with a depth of up to 8 m. The device is economical, its rated power is 880 watts. The device is equipped with a float switch, the operation of which can be adjusted by the user.

The drainage pump has a high-strength plastic casing and is equipped with an overheat protection system. The number of advantages of the device can be added the ability of long-term operation in the mode of incomplete immersion. It can be used for drainage of wells, reservoirs, sewage tanks, etc. The cost of such a device is quite democratic.

German quality from Karcher

Time-tested German manufacturer Kärcher produces reliable and durable drainage pumps. They are excellent for pumping even large volumes of liquids, since some models have a capacity of 18,000 l / h.

Drainage pumps
Easily recognizable drainage pumps of the brand Kercher are distinguished by high build quality, power, performance and long service life.

The Dirt series is designed for pumping out dirty water, the size of impurities in which does not exceed 30 mm. Pumps from this line are perfectly designed to work in ponds or flooded cellars, basements.

Drainage pump
The company Kärcher offers drainage pumps with a residual liquid level of no more than 1 mm. They pump out the water almost dry

For pumping clean or slightly contaminated liquids, the manufacturer offers the Flat series. These devices can be installed in pools or drainage wells. The peculiarity of the line is that the devices leave a layer of water no higher than 1 mm, that is, they pump out the liquid almost dry. Kärcher pumps are equipped with an intelligent level sensor with an adaptive algorithm.

This allows the device to almost instantly react to contact with the liquid and adapt to changing operating conditions over time.The SDP 9500 model has earned high praise from consumers. It is quite a powerful device for pumping dirty liquids with inclusions no larger than 20 mm in size. Equipped with a float switch and a ceramic-granite gland, significantly increasing the life of the device.

Cheap drainage pumps from PRORAB

LLC "Prorab" appeared on the market relatively recently. The company is engaged in the sale of equipment and tools under its own brand PRORAB. Products have an attractive balance between cost and quality. In the line of drainage pumps four samples. One of the most popular models is the PRORAB 8720 PP, which is notable for its low price and good performance characteristics.

Pumps Foreman in the rating of drainage equipment
Pumps for pumping dirty water of the Foreman brand are distinguished by an attractive ratio of affordable cost and high quality.

The device works with dirty water with inclusions no more than 35 mm in diameter, equipped with a float switch. The pump can be lowered into a liquid to a depth of no more than 5 m. The device capacity is about 12,000 l / h. At the same time, it has rather modest dimensions and relatively low power consumption.The drainage pump is easy to maintain and can be used for work in a pond or well.

Pumps for dirty water brand GNOM

Produced by the Moscow Pumping Plant. In the line of drainage devices there are household and professional models. The devices are equipped with a built-in hermetically sealed electric motor. Are intended for work with liquids with a density up to 1100 kg / m ³. The allowable size of impurities is 5 mm. Devices designed to work in a liquid medium with a temperature of from 35 to 60C, are labeled "T".

In the line of drainage equipment pumps one of the most popular varieties is the model 10-10. This is a submersible pump with a 1.1 kW electric motor. The head of the device is 12 m, the flow of liquid is up to 18 m. Such characteristics make it possible to use the device for pumping out sandy or clay water from deep trenches and trenches, flooded basements of a large area.

Drainage pump
The sought-after model GNOM 10-10 can be used to lower the level of continuously flowing groundwater

The drainage pump GNOM 10-10 can be used to lower the level of continuously staying groundwater.In addition, the equipment is used for watering greenhouses, greenhouses and gardens. The device has an air release button that speeds up its launch and ensures stable operation of the device. I must say that many owners of private estates and summer residences consider this particular model to be one of the best.

Conclusions and useful video on the topic

Types of drainage pumps:

Important selection criteria for a drainage pump:

How to choose a drainage pump:

The drainage pump must be in the household of a country house or cottage. Its functionality is quite wide. The device will successfully cope with pumping out water from a flooded basement or well, and will also help the owner in watering the area.

When choosing drainage equipment it is important to clearly understand how it will be used. This is the only way to choose a model that is optimally suitable for specific conditions. It should be remembered that its service life is directly dependent on the quality of installation and operating conditions.

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