Drainage pumps Unipump SUB without float: the universal helper. Design and types of submersible pumps with a float

Drainage pumps with an integrated float are used for installation in tanks, storage tanks, tanks, wells and other structures. Several floats can be installed in one tank with different functions: pump control, liquid overflow sensor, emergency level sensor.
They provide protection when used. pumping equipment in the "dry running" mode, and protection against overflow when filling the container. How to use the device with your own hands offers to get acquainted with this article.

Purpose and principle of operation of drainage pumps

Floatless are necessary for use in country and household plots, where they save their owners from many unpleasant problems. The main task of the devices is to ensure the removal of rain, Wastewater, pump out melt water from basements, cellars, wells, ditches, pits.
A drainage floatless pump is used when pumping water from a pool, pit, artificial pond. Special modifications of drainage units allow pumping out contaminated water.
per minute drainage pump, with medium technical specifications, can pump out approximately 180 liters of water. The power of the device decreases with immersion and the distance of the location of the pumping point.

Tip: Most drain pumps are for pumping hot water not intended.

The unit has two pipes:

• Entrance through which water is sucked in from a filled sewage pit.
• Output, through it the liquid is discharged outside the site. Liquid must not enter the engine.
  This may damage the device. In this case, the pump must pump the effluent faster than their level can rise in the pit.

Tip: K sewer system pumps are supplied through nozzles. Therefore, when installing a drainage pump, it is necessary to know the diameter of the sewer pipe with an accuracy of one millimeter.

The main advantage that a floatless drainage pump has is mobility. Equipment can be freely moved to any place where it is needed. Repairs in the event of a breakdown can be done quickly and easily.

Features of drainage pumps with floats

To protect pumping equipment, special float devices are used. The price of such devices is relatively small compared to the advantages they have.
There are two types of float switches:

• Lightweight, used primarily in water supply and drainage systems.
• Heavy, used for drainage, sewer, rainwater.

The float switch is a floating device in a plastic box.
Inside it are:

• Electric switch. It comes with a cable with three wires. different color: One wire is common and two are from the normally open and normally closed switch contacts.
• A steel ball that closes or opens the circuit contacts when the float changes position.

When the float is at the bottom, the circuit is closed with a common wire and normally open. If the float is at the top, the contacts of the wires of the common and normally closed wires are closed.
Wire not used in this moment according to the scheme, it must be insulated.

Tip: When purchasing a float, you should pay attention that the plastic box must be hermetically sealed, and the cable must be moisture resistant.

The cable outlet is sealed with a mechanical seal during manufacture. Remove in cable if necessary mechanical stresses, used special device supplied with the float.
The cavity where the cable enters is insulated and filled with polymer resin, which prevents moisture from penetrating inside. The housing material has good heat resistance, and thermoplastic rubber is used for the cable sheath, which makes the float switch resistant to alcohols that are harmful to the skin. chemical composition uric acid, liquid oils, gasoline and other substances.
On the surface plastic case There are no pores, which eliminates the possibility of all kinds of contaminants sticking to it. Sand, paper and other solids slide off freely without affecting the buoyancy of the float switch.

How to mount the device

The installation procedure for the float switches is as follows:

• The amount of current consumed by the pump is checked. It must be less than the maximum allowable, which is indicated by the instruction manual for the float.

The simplest and fast way– install in the tank.
In this case, a float with a cable and a special weight that comes with the kit are used:

• The weight is put on the cable and the size of the free play of the float is determined empirically.
• The weight is fixed on the cable with a latch.
• The cable itself is securely fastened outside the container.
• The float switch is connected to the pump.

Tip: The installation of a float switch on the supply cable can only be carried out if there is no danger that the float switch can catch or hang inside the tank and only one float switch should be located in it.

When mounting several float switches in a tank, they must be fixed on a special rod. Its role is usually played by a segment plastic pipe placed and securely fixed in the container. After that, floats are attached to the pipe.
For this they are:

• Expose.
• Regulate.
• The rods are spaced along the length so that they cannot interfere with each other to properly perform their intended functions.
• From the float switches, the cables going are fixed with clamps to the rod, as seen in the photo.

• The number of float switches is selected depending on the number of pumps or on the number of protective devices, their types and control panels used.
• There are times when for reliable operation these devices, you need to use several rods.

The quantity and where to mount float switches is determined individually at the place during installation or according to the project.

How does a float switch work

Several options for using float switches. The water supply system when filling and emptying the reservoir tank is in progress.
In this case:

• The tank filling pump will turn off the float switch on the ascent when the tank being filled is full, and turn it on when sinking to the bottom if the tank is empty.
• the device will turn on the water supply when it is on the surface, the tank will be full, and turn off the station when it sinks to the bottom, in which case the tank will be empty.
• The device will give a command to close the valve or valve with a servo, when raised to the surface, the container will be filled and open the valve or latch when lowered to the bottom, the container will be empty.
• The device will give a command to the dispatcher at the point or the operator, when raised to the surface, the tank is full, and it will give a signal about the lack of water, when lowered to the bottom, the tank will become empty.

Sewer system:

• The device will turn on fecal pump, if it floats on the surface, the container is full, and turns off the pump, when lowered to the bottom, the container will be empty.

Two pumps can be connected to one float: one pump will fill the tank if the float is in the lower position, at this time the second pump is not working, and in the upper position of the device the second pump works, pumping out the tank, and the pump filling the tank, at this time work will not.
Such a scheme for using a float switch is not very effective, there may be interruptions in the delivery of liquid, for a while when filling the container. How a drainage pump with a float works is well shown in the video in this article.

Operation, repair and maintenance of float switches

Under all operating conditions, the float switches operate long term without repair. If the device is used in the plumbing system or when draining water, it does not require periodic maintenance.
If the float switch will work in sewer pits, it is necessary to flush the float and the pump with a jet of water under pressure at least once a month, which will prevent the float from sticking or sticking to the drainage pump or pipe. If the contacts burn, moisture gets inside the float, or the cable insulation is damaged, the float switch cannot be repaired, but it needs to be replaced.

Submersible drainage pumps pump both clean and dirty water. Therefore, during the pumping process, the device controls the minimum liquid level on its own, using a float sensor. After all, only this unit can protect the unit from overheating or damage to the pump part due to dry running, since when the level drops below the critical level, the “fallen” float turns off the pump motor.

That is why units equipped with float sensors will last longer than pumps without this unit. After all, overheating and dry running destroy both the engine compartment and the working chamber of pressure equipment.

And in this article we will consider a list of the most popular drainage pumps equipped with a float sensor. You may be able to find in this list optimal model drainage equipment suitable for domestic use(irrigation of the garden, pumping out wells and basements, draining pools or puddles, and so on).

In this list, you will find both expensive European models and Chinese or domestic equipment available to a wider range of buyers. But all these pumps have one common feature- they are in steady demand, both from the end user and from the assemblers of drainage systems. And this list includes the following samples of drainage equipment:

Italian quality - Pedrollo TOP

The Italian brand Pedrollo specializes in the manufacture of pressure equipment and components for pumping stations. In the drainage segment, the most famous series of this brand is the TOP line, which includes units with a capacity of 10 to 25 thousand liters per hour.

In addition, pumps from this series pump water both from standard 3-5 meters, and from a greater depth - up to 10 meters. And some Pedrollo models from the TOP series can even be placed in a narrow casing pipe with a diameter of 220-250 millimeters. Moreover, the filter at the bottom of the pump passes only medium-sized particles with a diameter of up to 10 millimeters. Therefore, this series is used for pumping light or "gray" wastewater.

Of course, such equipment needs a sensitive float valve, and Pedrollo has the foresight to manufacture its own liquid level control unit.

And thanks to such a device, Pedrollo pumps are famous for their durability, supported, among other things, by other technological know-how of this manufacturer (ceramic seals, a special shape of the impeller, stainless steel shafts and filters, etc.).

The cost of pumps from the TOR series ranges from 6-7 to 13-14 thousand rubles.

Russian-Chinese breakthrough - Dzhileks "Drainage"

The Drainage series of the Gileks brand was developed in Russia, but is produced by Chinese partners. Moreover, the product quality control system in this Russian-Chinese company is built according to the best European standards.

As a result, the series is famous for its powerful pumps operating in harsh conditions (the unit pumps liquid with the inclusion of solid particles up to 35 mm in diameter) for a fairly long period (up to 10-15 years).

And the best pledge such longevity is the float valve designed specifically for this series. With the help of this unit, the pump is protected from overheating and is turned off in case of contact between the working chamber and air. And the "Drainer" has an internal heat exchange chamber, which allows you to turn on the pump even if it is not completely immersed in the pumped out medium.

Performance specific models from the “Drainer” series depends on the motor power and the dimensions of the pump working chamber. For example, an 880-watt Drainer 200/10f pumps up to 12 thousand liters per hour, lifting liquid or suspension from a depth of up to 8 meters. However, in this series there are also less productive units powered by a 200-watt motor with a capacity of up to 9000 liters per hour.

The average cost of pumps from the Drainager series is 4-5 thousand rubles, which, given the high performance, is quite good.

Hungarian classic – Grundfos Unilift

The Hungarian company Grundfos produces high-performance pumps in the Unilift series that can work with any media. After all, the bodies of these devices are made of stainless steel, and the special design of the working chamber makes it possible to turn on the pump not only in the classic "vertical" position - Grundfos Unilift is launched on an inclined plane, and even "lying" in a horizontal position.

Therefore, on the basis of Unilift, it is possible to assemble both portable and stationary system pumping ground water or artificial containers (including sewer sedimentation tanks or drainage wells).

After all, these pumps raise up to 14,000 liters of wastewater per hour with a 10-meter head, and their electric motor consumes no more than 400 watts.

That is why Unilift are quite expensive - from 14-15 thousand rubles, depending on the model.

Ukrainian unit - pump GNOM

A well-known brand from a neighboring country since Soviet times received a portion fresh ideas from a modern manufacturer - the company "Polesyeelectromash". And now the GNOM pump is packaged in a cast-iron casing and equipped with removable filters that can be cleaned even in the field.

Well, thanks to the “Soviet” hardening, this unit can be used not only in almost “greenhouse” conditions, pumping water from a pool or storm well, but also in hardcore mode - when pumping fluid from a construction pit, when pumping wells, and so on.

And even in these difficult conditions, the "Gnome" will not let its user down, providing a rise in water with a 16-meter head and a capacity of 12-16 thousand liters / hour.

And for all this you will have to pay only 5000 rubles!

European choice - Grundfos KP

Another product of the Hungarian company Grundfos - a series of drainage pumps KP - is focused on semi-professional use.

After all, Grundfos KP are quite expensive (from 13 thousand rubles), but I also work “for three”, pumping about 14,000 liters / hour with a 9-meter pressure.

And the KR also has a durable stainless steel case and its own thermal protection system, thanks to which the pump can be installed anywhere: even in a narrow well, even in a pit. And no need to maintain the mechanical part! Yes, this is not a pump, but just a gift!

Affordable Italy - Ergus Drenagio 400 F

Italian companies offer the global market not only expensive, but also budget equipment. At the same time, the level of quality and assembly remains almost unchanged.

And good example Such an inexpensive and high-quality pump is the Ergus Drenagio 400 F model - a centrifugal-type drainage pump equipped with a float sensor to control the liquid level in the area being drained.

This unit costs only 2.5-3 thousand rubles, but this did not affect its performance. The 400 F is capable of pumping 35mm solids from a depth of 5m up to 7500 liters of liquid per hour.

BUT low price due to the use in the design of a low-power motor (400 watts) and affordable structural material- almost all parts of this pump are made of structural polymers, which does not prevent it from competing with more durable devices, subject to careful handling of the unit body.

Chinese pump - Herz WRS 40/11-180

It is very powerful (energy consumption - 1.5 kW) and heavy unit (weight - 31 kilograms). But the performance of this device justifies everything. After all, the Herz WRS 40/11-180 pumps almost 20,000 liters per hour (330 liters / minute) from a 10-meter depth, and the pressure of this unit is 23 meters.

Moreover, the Herz WRS series is focused on working with fecal water and suspensions, and a special grinder is installed in the lower part of these units, crushing oversized fibers.

And taking into account all these design features, the price of the WRS 40 / 11-180 model - 14 thousand rubles - looks quite justified.

German legend - Karcher SDP 5000

This unit is the youngest model of the well-known series of submersible drainage pumps that pump out dirty water. Moreover, the entire "household" series Karcher SDP is famous for high quality knots and precise assembly. Indeed, in the design of such pumps there are parts from the professional equipment of this company.

The Karcher SDP 5000 model is designed for pumping wastewater with a solids content of "caliber" 5-10 millimeters. The pressure of this model is 6 meters, and the immersion depth is 3-5 meters. The performance of the SDP 5000 is moderate - the unit pumps about 80 liters of wastewater per minute, which guarantees minimal energy costs - this pump consumes no more than 300 watts.

The float sensor in this model is “proprietary” - it was developed by Karcher engineers. And in this case, it guarantees the timely shutdown and inclusion of the unit. But for older models from the Karcher SDP series, this sensor is associated with an intelligent control system that automates the operation of drainage equipment.

The cost of the SDP 5000 model ranges from 3 to 4 thousand rubles.

Drainage pumps with a float switch are widely used both for domestic purposes and in various fields of industry, construction and Agriculture. With their help, it is possible to remove blockages, clean wells and perform a bunch of other useful things. No wonder these pumps are so popular and in demand in the modern market.

From this article you will learn what types of drainage systems exist, study their principle of operation, structural part, and installation features.

1 Principle of operation and features

1.1 Types of float drains

The classification of drains is carried out depending on the method of their location. Allocate pumps and surface type. There are also units with vertical arrangement float switch.

1.2 Drainage pump with built-in submersible float

The submersible drainer has a sealed housing, which allows it to function when completely immersed in water. Such designs are often more powerful than surface type pumps, since they need to lift the pumped liquid to a greater height, which requires high pressure.

Compared to surface drainage pumps, submersible unit has the following advantages:

• Minimum noise during operation;
• High productivity;
• Versatility - these pumps are able to pump liquid from large quantity mechanical pollution;

The disadvantages include:

• The complexity of the repair, due to the violation of the tightness of the body during disassembly;
• The need for periodic cleaning of the pump and float switch, as they clog very quickly in dirty water;
• Limitation - a submersible drainer is not able to pump out effluents from shallow water bodies (a minimum depth of 30 centimeters is required, as this requires constant cooling of the electric motor with water)

1.3 Drainage pumps with built-in surface type floats

In such devices, wastewater is taken through a sleeve - rubber hose, or PVC pipes, which descends into the waste liquid, while the pump housing itself is located on the soil surface. The float switch on an extended cable is lowered into the wastewater along with the hose.

The main advantages of such pumps are ease of installation and maintenance. The disadvantages include the noise that the device emits during pumping water. Cooling power unit in such devices is carried out by means of a pumped liquid.

1.4 Drainage fecal pumps

Fecal pumps are used to pump sewage from septic tanks and cesspools. In fact, they are an improved version of a conventional drain, and can fully perform all of its functions. A feature of such devices is increased power - since fecal effluents are generally much thicker than ordinary sewage.

The fecal pump has an additional structural element- a special mesh that grinds large waste. According to the location method, such a device is identical to conventional drains: there is a submersible and.

1.5 Vertical drains

Such pumps are equipped with a vertical float switch, which allows automatic pumping of water from confined spaces. Most often, vertical float pumps are used to drain failed pipelines. If necessary, they can be operated as conventional drains.

1.6 Main manufacturers

Today, the range of drainage pumps in the domestic market is clearly divided into two categories: budget devices, which include a variety of domestic and Chinese manufacturers, and expensive foreign pumps.

An analysis of supply and demand showed that in the category of budget drains, the most the best option are the Malysh pumps, while the leader in the segment of high-quality devices is the company "".

2 Stages of connecting drainage pumps

After connecting the float switch to the pump, it must be configured. It is best to do this in a full water container of a suitable volume, and only then give the pump a “battle test”. Connection and configuration is carried out in several stages:

If several drainage pumps are used in the water pumping system, and accordingly several floats, then they are mounted on a rod, the role of which is usually played by an ordinary plastic pipe.

Features of direct installation of the drainage pump are as follows. To drain the pumped liquid, use a hose whose diameter is identical to the diameter of the pressure pipe of the drainer.

If the hose is thinner, the drain pump drive with float switches will be permanently overloaded due to unnatural pressure drop. This mode of operation has a very negative effect on the resource of the device.

Under the drains of a submersible or semi-submersible type with a lower water intake, it is necessary to substitute some kind of platform (even an ordinary sheet of metal will do) so that the pump does not pick up silt and sand from the bottom of the pumped out tank.

A submersible fecal pump can be installed directly on the bottom of the septic tank if it is concreted and has a flat and hard surface.

If the sewer pit is simply dug in the soil, then it is better to hang the fecal pump on a steel cable 15 centimeters from the bottom, since during the operation of the septic tank, the soil at the bottom can soften and absorb the submersible pump.

Before lowering the device into cesspool, on mounted flexible hose for sewage disposal (depending on the branch pipe, it can be fastened with a coupling or thread, if no fastening is provided, fix the hose with a plastic clamp).

If you want your drainage pump to fully work out its working life, it is necessary to carry out preventive cleaning from time to time. It is not required if a submersible pump is used to drain clean water without mechanical impurities.

However, if the device is used in a contaminated environment, such as a sewer pit, it should be cleaned once a month. It is done simply: with a stream of water under strong pressure (from a hose), the pump and the float are washed from dirt. Thus, you need to clean and.

2.1 Overview of the design of the drain pump with a float (video)

As options expand, modern pumps become more and more functional. The presence of automation and the possibility of connecting several pumping systems into one complex significantly increases the operational benefits. A wave of technological development also swept traditional water intake units, resulting in a drain pump with a float switch and electronic control. The introduction of new systems allowed the owners of such devices with great comfort perform business tasks. This can be pumping water from the basement, emptying tanks, watering operations, etc.

Pump device

Most models are small in size, which facilitates operational activities. In the manufacture of the body is used stainless steel or plastic. Although synthetic materials add in strength characteristics, in terms of reliability, nevertheless more profitable purchase metal aggregates. But in this case, it is necessary to prepare for an increase in mass. It performs the function of an internal suction device. Depending on the version, it can be either a small device for working with relatively clean water, or a high-performance drain pump with a float switch that can effectively cope with contaminated compositions. True, the very concept of pumps of this type makes it possible to work with large particles and abrasives in aquatic environment. For this reason, most models are equipped with a wide working chamber for optimal throughput.

Principle of operation

A traditional drainage pump is immersed in water and starts pumping it out. But in this case, it is worth paying attention to which makes its own corrections in the process. The device is designed to protect against operation in the "dry run" mode, which insures against breakage. The usual way operation assumes that the pump will run until it is stopped by the operator. For this reason, even after the tank is empty, the unit can continue to perform its function, which is very harmful for the technical stuffing. This risk completely eliminates the drain pump with a float switch, the principle of which allows automatic shutdown. The need to stop is signaled by the baro relay regulator, which is located in the float device and reacts to the water level. The autonomy of the operation of such units goes far beyond the scope of one-time events. The pump can be left in a flood area and will pump out every time a certain water level is reached.

Main characteristics

The main indicator of the performance of a drainage pump is productivity. Models for domestic use can provide pumping with a productivity of the order of 140-170 l / min. For right choice it is necessary to estimate the volumes of water that will need to be serviced and compare this value with time. The higher the productivity, the less time will be spent on the workflow. The direction of the pressure, which will be provided by the drainage pump with a float switch, should also be taken into account. The instruction for such units usually gives the characteristics of the fence on the basis that the value of the vertical pressure per 1 m corresponds to a similar force in vertical position but at a distance of 10 m.

Manufacturer reviews

The market is divided into models for professional and domestic purposes. For private needs, the brands Gardena, Metabo, Al-ko Drain and others are recommended. Separately, users praise the drainage pump with a Dzhileks float switch, which is represented by compact but efficient modifications. Quite a few positive feedback and about the Karcher brand. Some of the models of this brand are capable of dehumidifying up to a level of 5 mm.

Concerning professional equipment, then Speroni is the leader in this segment. Although the models of this company are massive in size, in terms of reliability, this is one of the most the best options. If you need a device to work in problem areas with a high content of impurities in the water, then you should choose this particular drainage pump with a float switch. Reviews note that it is quite possible to use it for organizing drainage system not only within a private area, but also in specialized farms.

Pros and cons of the unit

The design of drainage pumps allows them to be used in a variety of areas - from maintaining pools to watering a summer cottage and draining a basement. Manufacturers tend to endow such equipment with small cases, which also increases the ergonomic advantages of the pumps. The shortcomings of the equipment appear already in the process of long-term use. Since the drain pump with a float switch is designed for operation in close contact with water, after a while traces of deformation can be found on the surfaces of the housing. It can be said that manufacturers increase the durability of units through the use of high-strength and durable materials, but aggressive environments leave no chance in the long term and quality plastic, and metal alloys.

Conclusion

The organization of the drainage system requires integrated approach to the choice of its components. In most cases, a drain pump with a float switch is used as the basis, but for its full operation, a whole set of accessories should be purchased. These can be adapters, hoses, fittings, fasteners and other devices that increase the reliability and performance of the drainage function. Also, the latest versions of the pumps are equipped with automatic systems, thanks to which the control of the unit by the user is facilitated.

To private house was beautiful and comfortable to live in, needs maintenance and care. Various technical devices, among which it should be noted a drainage pump with a float switch.

It is useful, compact and easy to use. It will help to cope with everyday problems and will be indispensable in some emergency situations. Consider the features of the application, internal device this device and some other aspects.

The scope of use of drainage pumps with a built-in float switch is quite extensive. First of all, as the name implies, this is to ensure the effective functioning of the drainage system.

drainage system and storm sewer are indispensable components of a well-equipped site. They remove excess moisture, protecting the foundation from destruction, and the site from waterlogging. But with heavy rainfall or melting snow, the systems may not be able to cope. Then there is flooding of basements and ground floors. Drainage pumps, which are designed to pump out not very clean water, will help to remove water.

If the house is built initially on a wetland with a close location of groundwater, then the drainage system does not always cope. In this case, a pit is made to collect water, from where it is pumped using a drainage pump with a float. It is also periodically required to pump out water from the collector of the drainage system.

Rice. 1 Water pump

But the scope of these pumps is not limited to drainage. They are used to create artificial reservoirs with fountains, waterfalls and other elements that require constant movement of water.

Such electric pump help organize the irrigation of the site. It can also be used for pumping clean water in the domestic water supply system.

Types of drainage pumps

There are two main types of such pumps with built-in floats: submersible and surface.

Submersible drainage devices are equipped with a sealed housing, which allows them to work when completely immersed. Their power is higher than that of the surface.

Drainage submersible units have certain advantages. They are less noisy than surface appliances. Greater productivity and versatility.

disadvantages submersible models are the complexity of the repair, since it is required to break the tightness of the case. If the pump works in dirty water, then it will have to be cleaned periodically. In addition, there are restrictions on the use. Such a device cannot be used when the thickness of the water layer does not exceed thirty centimeters.

Surface drainage pumps are placed outside the water. Fluid intake is performed using a hose. The float switch is lowered into the liquid to control the pumping process.

The main advantages of surface models are ease of maintenance, installation and repair. The disadvantages are lower power and significant noise from the operating unit.

In some cases, drainage pumps are divided into groups according to the nature of the pumped water. In such cases, in addition to the usual drainage devices also excrete fecal matter. They are able to cope with a heavily contaminated liquid in which there are fibrous inclusions. Very often, the fecal submersible unit has a special grinder so that the inclusions do not create blockages.

Design and principle of operation

All pumps related to drainage have approximately the same internal design. There are two parts: an electric motor and a working chamber, which are hermetically separated. The electric motor is in a hermetic case and a carefully insulated cable is connected to it. AT working chamber there is a wheel with an impeller. The latter has special form to effectively impart centrifugal acceleration to the liquid. The more complex shape impeller, the more sensitive it is to water pollution. However, it provides more power.

The principle of operation of a float pump is quite simple. The float for the drainage pump has a small weight, which allows it to tend to the surface. As the water is pumped out, its level decreases and the position of the float changes. When the level reaches the minimum for a particular device, the float is in such a position that the switch is activated.

The switch is inside the float. It consists of several parts, one of which is a ball. When the float tilts, the ball rolls and the system automatically turns off. Such a scheme makes switching on and off automatic and allows the use of an electric pump without constant supervision of it.

Features of choice

When choosing pumping equipment, they usually first of all pay attention to the power of the device and the water pressure it creates. When choosing a pump by power, you should not focus on maximum performance. With their increase, the dimensions and weight, the amount of energy consumed and the cost increase. In addition, a powerful device heats up faster. Much more important indicator is pressure. It should be enough to run the scheduled processes.

When calculating required pressure the depth from which the water must be pumped out and the length of the horizontal sections of the hose are taken into account. In addition, the diameter of the hose has an effect. If it is more than one inch, then its hydraulic resistance is excluded. In other cases, as the diameter decreases, the resistance increases.

The choice between submersible and surface models is made based on the nature of the intended application. It is also worth considering whether the pump is selected for dirty water or the pumped liquid will be relatively clean. All these parameters are important when choosing a drain pump with an integrated float switch.