Choosing a submersible pump for pumping contaminated water dry from a flat floor

Some users need a drainer with pumping to the bottom - for draining pools or water containers. Not all submersible pumps have this capability. In fact, the water intake neck of the device should be 1-3 mm from the surface. Some models have removable attachments for this purpose, others are directly designed for such “jewelry” work.

What does the market offer?

The situation on the drainage pump market is as follows: the overwhelming number of offers are made in China, a small selection of domestic and European brands, there are American brands that are also assembled in China. Both the price and durability of the pump largely depend on the logo on the drainage pump. Products from the brands KARCHER, Pedrollo, DAEWOO, NOVA, Sturm

.
A good ratio of quality and price will be shown by models from the brands PATRIOT
and
Metabo
. Domestic companies, whose products are also in demand on the market, are not far behind them.

Choosing a drainer with pumping to the bottom

With such selectivity, the choice of device brand fades into the background. A user who needs pumping to the bottom should first of all pay attention to the following parameters of the drainage pump:

Availability of manual mode.

When pumping to the bottom, this function will avoid stopping the unit due to the activation of the float mechanism.

Water intake level.

This value directly affects the ability to pump water to the bottom. Ideally, the distance from the neck to the base of the tank should be within 1-5 mm. In this case, due to the surface tension of the sucked water, the residue level will always be below 5 mm. And in the case of a gap of 1 mm, pumping will be almost dry.

Pumping function to the bottom.

Such pumps have a removable (replaceable) lower part or an adjustable base, which allows you to change the distance from the water intake neck to the surface of the tank.

Pumping depth.

The maximum operating depth of the pump must be no less than the parameters of the pool or other tank.

We invite you to familiarize yourself with our selection of drainage pumps that pump water with virtually no residue. The rating includes units with the largest number of positive ratings from different users.

Tips for choosing

Choosing a pump is not difficult, just keep in mind a few nuances:

• Household pumps with a wet rotor are compact and make less noise during operation. No preventative maintenance is required, and they are easy and affordable to install.
• Circular pumps with a dry rotor are cooled by external air, they need to be mounted to the wall - this way they will be securely installed and will last much longer.
• Water pressure - the higher it is, the better, since the pump is suitable for installation in a house or apartment.
• Energy consumption level. We recommend choosing pumps with a low rating: they will work with good power, and you will save on energy costs.

Top 10. Sturm WP9745PU

Rating (2021): 4.19

5 reviews taken into account from resources: AllInstruments

Resistant to overloads German quality of assembly and component materials provided the Sturm WP9745PU drainage pump with a good margin of safety. Thanks to this, the device can easily withstand overloads during operation and has a long service life.

• Characteristics

  Country: Germany

  Read also:  How to do the installation of water supply in a frame house with your own hands: Step-by-step instructions - Review + Video
• Average price: 4780 rub.
• Power: 450 W
• Capacity: 12 m³/h
• Particles up to: 30 mm
• Head: 6 m
• Immersion depth: 5 m
• Weight: 5.3 kg

If it is necessary to pump water to a minimum level of 1 mm, you can use the Sturm WP submersible pump. With its help, you can drain a cellar, swimming pool, waste pit, etc. For optimal performance, you should select one of the 3 available operating modes depending on the degree of water contamination. The diameter of the passed particles can be from 1 to 30 mm. The overload-resistant motor provides optimal operating speed, with the ability to pump up to 12,000 l/min. The device body is made of impact-resistant plastic and equipped with a carrying handle. The package includes a universal pipe. Sometimes it can be difficult to get the pump in a certain position to start working.

Advantages and disadvantages

• Versatility
• Overload protection
• Long cord

• Long installation

Top 9. Pedrollo TOP 2

Rating (2021): 4.41

High build quality The Italian drainage pump Pedrollo TOP 2 is distinguished by impeccable build quality thanks to strict control at all stages of production.

• Characteristics

  Country: Italy

• Average price: 11,450 rub.
• Power: 370 W
• Capacity: 13.2 m³/h
• Particles up to, mm: 10
• Head: 9 m
• Immersion depth: 5 m
• Weight: 5.10 kg

The Pedrollo TOP 2 submersible pump is intended for domestic use associated with the pumping and drainage of liquids with a maximum solid particle size of 10 mm. Optimal hydraulic performance allows you to pump water from a tank or pool almost to the bottom. With low power consumption, this model demonstrates the best performance results of 220 l/min. Among the advantages is the possibility of short-term (up to 3 minutes) operation in water with temperatures up to 90˚C. The pump operates in continuous automatic mode S1 and confidently copes with pumping out septic tanks and drainage pits, although there is a risk of clogging.

Advantages and disadvantages

• Economical
• High performance
• Hot water pumping

• Short wire

Video description

Video instructions for selecting a well pump:
The value is calculated using the following formula:

Rtr = (E * K + Ssum) / r * n

Rtr – required pressure,

E – friction losses,

K – maximum length of the pipeline, taking into account the distant heating device,

Ssum - the sum of safety factors for fittings, fittings, mixers and other elements,

p – coolant density,

n is the physical value of the acceleration of free fall.

• Centrifugal

In order to calculate the required flow of a centrifugal pump, you need to take into account the speed of the impeller - in fact, it will be equal to the difference in water pressure at the inlet and outlet into the cavity with the impeller. To calculate the theoretical value of the quantity, the following formula is used:

Nteo = y *s *cos a / n

y – peripheral speed,

c – speed of water movement,

cos a – cosine of the angle between the speed at the entrance to the working cavity and the peripheral speed,

n is the magnitude of the acceleration of free fall.

The theoretically calculated productivity is multiplied by the hydraulic correction coefficient (0.8-0.9) and the factor taking into account the number of blades (0.6-0.8). The pressure of the device is calculated in the same way as for analogues.

Top 8. PATRIOT F 600 D

Rating (2021): 4.49

Long service life The PATRIOT F 600 D sump pump has a long service life thanks to the effective sealing of the motor.

• Characteristics

  Country: USA (China)

• Average price: 3740 rub.
• Power: 600 W
• Capacity: 10 m³/h
• Particles up to, mm: 35
• Head: 6 m
• Immersion depth: 7 m
• Weight: 5 kg

The PATRIOT F 600 household drainage pump will be the best assistant in case of flooding of household areas with rain or groundwater. In an hour of operation at zero lift height, the presented model can pump 10,000 liters of liquid. For optimal results, the distance from the water surface to the pump body should be no more than 7 m. Adjusting the base allows you to pump out dirty water including foreign particles up to 35 mm. The pump has a full suction function up to a minimum residue thickness of 1 mm. In general, the unit copes with its tasks adequately, but is a little noisy. An effective sealing system increases the service life of the model.

Advantages and disadvantages

• For dirty water
• Robust housing

• Noisy

Calculation by measurement and calculation

To calculate the minimum force required to start a pump (or head), you need to know the performance (or flow) and the total velocity head, for which the following formula is used:

R = Main * P * Uvzh / 3960

P – water flow power, in horsepower (hp),

Main - total speed flow, measured in meters or feet,

P – productivity equal to water flow, measured in gallons/min (gpm),

UG – specific gravity of the pumped liquid, for water equal to 1,

3960 – correction factor.

To measure data, enter it into a formula and then calculate it, the following algorithm is used:

• The required flow rate is determined. The example considers a pump to irrigate a garden plot from a well, which requires 20 gpm.

When calculating power, the distance from the well to the tap, shower and other consumers must be taken into account Source: well24.moscow

• The vertical distance between the water intake point at the source and the receiver point is measured. For example, the distance between the water intake holes of a pump in a well and the watering point can be 30 meters, or translated into the English measurement system - 100 feet.
• The head loss due to thorn forces in the water supply system is estimated. Using a 1-inch plastic pipe as an example, about 6.3 feet of head is lost for every 100 feet of length. For example, the total length of the pipe, including the horizontal section, will be 150 ft. - the total loss will be about 9.5 ft. This takes into account losses on connections and transitions. If we assume that the pipeline will have 1 rectangular transition and 3 straight threaded ones, the value for this material will be 15 ft. Total 9.5 + 15 = 24.5 ft.
• The total feed height and losses are summed up. In this example – 150 + 24.5 = 174.5 ft. The resulting value corresponds to the value of Main in the above formula. This will be the minimum load that the pump motor must handle.

The more branches in the water supply, the greater the loss of pump power Source znatoktepla.ru

• The measured values ​​are substituted into the above formula and the useful minimum pump power or water flow force in liters is then calculated. With. P = 174.5 * 20 * 1 /3960 = 0.88 l. With.
• The motor power value of the pumping equipment is adjusted taking into account the efficiency indicator. The latter, as a rule, varies in the range from 50 to 85% in modern models. If we take its minimum value as an example, we get = 0.88/0.5 = 1.76 liters. With.

Reference! The power of the pump motor can be indicated in both watts and horsepower. 1 l. With. = 746 W. In the above example, the device is 1.76 liters. With. corresponds to 1312 W, or 1.3 kW.

Top 7. Belamos Omega 55 F

Rating (2021): 4.50

33 reviews from resources were taken into account: Yandex.Market, AllInstruments

The most popular pump for pumping out The domestic drainage pump Belamos Omega 55 F is distinguished by its ergonomics (float inside the body) and durable design, which, coupled with a balanced price, determines the increased demand for this model.

• Characteristics

  Country Russia

• Average price: 4500 rub.
• Power: 550 W
• Capacity: 10 m³/h
• Particles up to, mm: 16
• Head: 7 m
• Immersion depth: 7 m
• Weight: 4.75 kg

The Belamos Omega submersible drainage pump can be the best assistant when pumping lightly contaminated water and organizing a garden irrigation system. The unit begins to draw water at a level of 5 mm, which allows you to effectively drain a pool or other filled container to the bottom. The compact dimensions of the model and the float built into the body allow it to be used in small tanks. Owners of this pump note its quiet operation and ease of use over many seasons. The ceramic seal and stainless steel shaft parts increase the service life of the device. There are reviews of the float freezing and running idle.

Advantages and disadvantages

• Thermal protection
• Quiet
• Long service life

• No float setting

Video description

Video example of calculating pump power for heating:
The pressure value is calculated as follows:

1. When there is a spare tank located above the pump. Rtr = Rgeo + Rloss + Rfree – Rheight of the tank.
2. When the water source is below the pump. Rtr = Rgeo + Rloss + Rfree + Rheight of the source.

The performance of a surface-type pump is calculated using a standard method, taking into account a correction factor.

• Circulating.

A circulation pump is used to pump coolant in an autonomous heating system. For effective operation of the latter, particularly careful calculation of both the pressure value and the performance indicator is required.

Productivity is calculated using the following formula:

Ptr = Tneobh / (1.16 *Tout – Tin)

Ptr – required performance,

Тneobh – thermal power of the boiler,

Tout – Tin – temperature difference between the coolant at the outlet to the system and the inlet to the unit,

1,16 – specific heat capacity of water.

The pressure of the circulation pump is determined not by the difference in height between the source and the receiver, but by the value of the hydraulic resistance.

Top 6. Dab VERTY NOVA 400 M

Rating (2021): 4.53

For long-term operation without interruption The Dab VERTY NOVA 400 M pump has a heavy-duty design and an efficient engine cooling system, making it ideal for continuous operation.

• Characteristics

  Country: Italy (Hungary)

• Average price: 15290 rub.
• Power: 550 W
• Capacity: 11.2 m³/h
• Particles up to: 5 mm
• Head: 9 m
• Immersion depth: 7 m
• Weight: 5 kg

The high-quality drainage pump Dab VERTY NOVA will be an excellent assistant in the household. Its compact dimensions allow you to pump water from small wells and tanks with inlet diameters up to 25 cm. The presence of a manual mode makes it possible to pump out liquid to a level of 2 mm, which is very convenient for draining the pool. The device is designed to work with clean water; particles up to 5 mm are allowed. The float switch in this model is located directly in the housing, thereby eliminating the risk of jamming. The pump is equipped with an efficient cooling system and is designed for increased loads. Users note that switching modes is not very convenient.

Advantages and disadvantages

• Build quality
• Highly durable housing
• Thermal protection
• Easy cleaning

• It’s inconvenient to choose a mode

Features of external pumps

These devices are designed for periodic pumping of water.
Their prolonged use puts a lot of stress on the mechanism, which leads to breakdown. Liquid intake occurs through flexible hoses. In this way, it is possible to pump out liquids up to eleven meters deep. Moreover, the presence of large particles up to ten millimeters in water is acceptable.

Centrifugal type unit design

The unit has a pump chamber and a motor compartment. The rotor (shaft) connects the working compartment and the engine. The shaft contains wheels with blades designed to pump liquid and maintain high line pressure. This pump is easy to install. The body is mainly made of polymer or stainless steel.

Manufacturers of these pumps are such global brands as Gardena, Pedrollo, Karcher, Dab. There are also domestic manufacturers - Gileks and Sprut. The most popular brand of devices for pumping out dirty water is Pedrollo Pkm60. This model is capable of maintaining pressure up to forty meters, as well as pumping up to two thousand liters of water in 1 hour. Equipped with a cast iron body.

We should also highlight the OPTIMA JET 80S-PL pump, which has established itself as the best among the owners of country houses. The case is made of steel and has a power of up to eight hundred watts. Maintains pressure at a distance of up to thirty-three meters. Capable of pumping water up to 3 cubic meters. m/hour.

Centrifugal units

The housing of centrifugal pumps can be monolithic or cantilever.
The top of the device performs a protective function, and the work area is located at the bottom. The chamber contains impellers with an impeller in a circle. There is a filter with a mesh under the wheels. There is a stand on the bottom of the device. They have a throughput capacity of no more than two to two and a half centimeters. The following brands of submersible pumps are Aquatica, Grudfos, Gilex, Metabo, Sturm.

The most common is the Aosta AB SMP 400SS DO pump, which has a power of up to four hundred watts. The unit has an auxiliary discharge connection. Automated operation occurs through a float switch. Can work at a depth of up to five meters. Withstands water pressure at a distance of up to ten meters. Capable of pumping liquids up to 298 l/min.

You can also highlight the domestic pump Drainage 200/25, produced by the company Gilex.

Vibration units

The liquid is pumped through the oscillating movements of the resonator. Centrifugal devices are represented by dynamic devices, and vibrating devices are volumetric devices.

The working chamber of such devices has a membrane that serves as a closure to the engine compartment. It is fixed on a metal rod. The engine here is replaced by a capacitor, which attracts liquid during the working process.

At the same time, the working chamber expands, and water is drawn in through a vacuum. When the chamber narrows, the liquid is pushed into the pipe and the inlet is closed using an inverse valve. This ensures water supply without jerking. In terms of productivity, this type is inferior to the centrifugal one.

Water pumps of both submersible and surface types are quite expensive. So, for periodic use, it is not always advisable to purchase an expensive electric pump. The best option here would be to purchase a hand pump. This device is made like a pneumatic hand pump. Here the piston represents the working element.

When the handle is lifted upward, the rod and cylinder are tightened. In this case, the chamber is filled with rarefied air and water begins to be absorbed. When the handle is turned down, the pressure increases and the liquid closes the valve in the suction hole and all water under pressure is discharged through the pipe.

Naturally, in terms of functional characteristics, a manual type device cannot compete with electric devices, but in terms of ease of operation it can compete with electric models.

Top 5. WWQ ND-250V

Rating (2021): 4.55

17 reviews taken into account from resources: AllInstruments, DNS

Best price Drainer WWQ ND-250V is the most inexpensive among the participants in the rating. The closest competitor, a pump from DENZEL, will cost the consumer 30% more.

• Characteristics

  Country Russia

• Average price: 2800 rub.
• Power: 250 W
• Capacity: 6 m³/h
• Particles up to, mm: 10
• Head: 6.5 m
• Immersion depth: 8 m
• Weight: 4.1 kg

The inexpensive WWQ ND drainage pump is perfect for draining drains, swimming pools and tanks. Mechanical inclusions in water should not exceed 10 mm. In case of overheating, a single-phase motor automatically switches off and resumes operation after it cools down. The model is equipped with an air valve and a dry running sensor. There are automatic and manual modes of operation, with which you can pump out water from the container almost to the bottom. The location of the pump does not affect its performance in any way. Among the advantages, users highlight compact dimensions and quiet operation. The water intake holes are larger than the permissible particle size, and this is a minus.

Advantages and disadvantages

• Price
• Convenient design
• Quiet operation
• Life time

• Inconvenient hose adapter

Design differences

Hydraulic pumps come in the following design types:

Top 4. DAEWOO DDP 17000

Rating (2021): 4.60

21 reviews taken into account from resources: Yandex.Market, AllInstruments

Best performance The DAEWOO DDP drainage pump has the most powerful motor of 1300 W, thanks to which the equipment demonstrates the best performance in the rating. The closest competitor, Metabo, pumps 3 cubic meters per hour less.

• Characteristics

  Country: South Korea

• Average price: 6190 rub.
• Power: 1300 W
• Capacity: 17 m³/h
• Particles up to, mm: 35
• Head: 11 m
• Immersion depth: 7 m
• Weight: 5.5 kg

The powerful DAEWOO DDP drainage pump is equally good for working with clean and contaminated water with particles up to 35 mm. The model demonstrates better throughput, so pumping large volumes does not take much time. Optimal lifting heights make it possible to organize the most distant water drainage without loss of pressure. The device is effective in completely drying containers and pools. Liquid is pumped out almost to the bottom, even in the presence of a small admixture of sand and silt. The package includes a universal adapter for different hose diameters. According to users, there is not enough side mounting for more convenient diving.

Advantages and disadvantages

• Strong pressure
• High performance
• Stainless steel inserts
• 3 year warranty

• Inconvenient cable mount

See also:

• 10 best drainage pumps for dirty water under 5000 rubles

Top 3. DENZEL DP500E

Rating (2021): 4.62

The best combination of price and quality The DENZEL DP500E drainage pump pumps out water without residue, has balanced performance characteristics and a fair price.

• Characteristics

  Country: Germany

• Average price: 3990 rub.
• Power: 500W
• Capacity: 7 m³/h
• Particles up to, mm: 5
• Head: 7 m
• Immersion depth: 7 m
• Weight: 4.9 kg

To pump clean water from narrow tanks, wells, barrels or swimming pools, you can use the compact DENZEL DP drainage pump. The model is equipped with an electronic switch and can operate in manual and autonomous mode. The advantage is the ability to completely withdraw fluid to a level of 1 mm. The unit has protection against overheating, the housing is resistant to mechanical and chemical influences. Users note the high quality of parts and durability of the pump. However, it cannot boast of the best throughput performance. With a power consumption of 500 W, the device is capable of distilling liquid up to 116 l/min.

Advantages and disadvantages

• Electronic sensor
• Build quality
• Durability

• Doesn't turn on right away
• Pumping speed

See also:

• 10 Best Sump Pumps

Top 2. KARCHER SP 5 DUAL

Rating (2021): 4.65

The most durable The reliable motor design, the materials used and the protective filter make the KARCHER SP 5 DUAL drainage pump the most durable among the participants.

• Characteristics

  Country: Germany

• Average price: 9990 rub.
• Power: 500W
• Capacity: 9.5 m³/h
• Particles up to: 20 mm
• Head: 7 m
• Immersion depth: 7 m
• Weight: 4.85 kg

The multifunctional model SP 5 DUAL from the famous manufacturer KARCHER is popular among owners of private houses. Using this submersible pump, you can not only organize watering of the area, but also drain a flooded basement or drainage hole. The unit is capable of pumping up to 9500 l/h with a small volume of solid particles with a diameter of up to 20 mm. To completely empty the pool before winter storage, you can use the pumping function to the bottom. To do this, you only need to replace the filter. An additional advantage is the increased service life of this drainage pump. One of the shortcomings is the lack of an adapter for a ¾-inch hose in the kit.

Advantages and disadvantages

• Reliability
• Good speed
• Ceramic seal

• No adapters for hose of different diameters

See also:

• 20 Best Submersible Pumps

Top 1. Metabo TPS 14000 S Combi

Rating (2021): 4.68

The most reliable The high fault tolerance of the Metabo TPS 14000 S Combi pump has been achieved thanks to high-quality components, impeccable assembly and modern design solutions.

• Characteristics

  Country: Germany

• Average price: 6900 rub.
• Power: 700 W
• Capacity: 14 m³/h
• Particles up to, mm: 20
• Head: 8.5 m
• Immersion depth: 7 m
• Weight: 7.7 kg

The Metabo TPS combination pump is characterized by high build quality and ergonomics. The model is equipped with a comfortable handle and a float with fence level adjustment. To set the desired mode, you only need to change the position of the lower console. When pumping clean water, the unit will provide an almost dry bottom with a minimum liquid level of 1 mm. The ability to pump slightly contaminated water allows you to use a drainage pump to drain a swimming pool or artificial reservoir. The sealing system will protect the engine in the event of particles larger than the permissible diameter. The body of the product is made of durable plastic with stainless steel elements. It is larger than most models in size and weight, so it is not very convenient to handle.

Advantages and disadvantages

• Ergonomic
• High fault tolerance
• Easy to set up

• Heavy

See also:

• 10 best pumps for watering your garden

to the beginning of the rating

Types of automatic systems

Most submersible well pumps on the market today are based on two automation principles:

• Application of hydropneumatic system;
• Use of electronic components.

simpler hydraulic accumulator system is a combination of a reservoir (hydraulic accumulator) and one or more relays, which allows you to regulate the fluid pressure in a pipeline or hose system.

The electronic automatic system allows you to achieve significantly higher efficiency, since digital mini-units are installed directly into pipelines, or even into the device body (for example, Grundfos). However, the accuracy of adjustment and high service capabilities dictate a significantly higher cost of the entire system as a whole.

On the one hand, a well pump with automatic pneumatic type costs much less. On the other hand, it has much lower productivity and accuracy of water supply adjustment.