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Water pumps motor: discover all the answers to your needs

The Motor is one of the most important parts in the operation of a water pump.

So, any business that wants to get into the marketing of water pumps must educate themselves about the questions consumers can ask about the water pump motor.

This will allow you to prepare yourself to respond with much more clarity to the questions customers will ask you when making a purchase.

In this guide, we will tell you about all the questions consumers may have about the water pump motor, whether they are looking to buy or looking for information.

Besides, you will discover the answer to all these questions.

So let’s start with the very first question!

What are the common water pump motor problems and how to fix them?

For domestic well water users and some water users on construction sites or in agriculture, water pumps play a very important role in their daily operations.

Mainly to facilitate the MCK process during cooking.

It is not surprising that many people try to buy the best water pump so as not to disrupt household activities.

However, regardless of the quality of the electronic equipment, there are some drawbacks that we sometimes ignore, especially for new users and those unfamiliar with the characteristics of water pump motors.

Among the many problems that often arise with water pump motors from Shimizu, Sanyo, Panasonic and other brands, here are the most common problems and how to solve them.

Water does not flow even if the pump is on

Not only is it often encountered by those who have just installed pumps, but this problem is also often encountered by old pump owners.

A water pump that starts and rings but does not produce water is usually caused by these facts:

There is no source of water. During the dry season, conventional wells and boreholes can experience drought so that no water rises when the pump motor is turned on.

For this problem, one can find out by listening to the sound of the engine on the water pump.

A water pump that sounds normally, is not slow, does not hum, and the engine that is running, indicates that there is no water available to be sucked using a water pump.

The well is too deep. The motor of each water pump has certain specifications that allow it to suck water to a certain depth.

Therefore, before buying a water pump. It is a good idea to consider the depth of the well and then choose a water pump whose specifications can be used to draw water to the maximum depth. If the pump you are currently using does not meet the required specifications, you can replace it immediately and buy a new one with deeper suction.

Pipe leak. Leaks can occur in the vacuum pipe at the bottom.

This leak usually occurs at pipe joints which makes it difficult for water to move up.

Damage to the water pump valve. The Tusen valve serves to hold water from returning to the well. If the valve is damaged, the water will return to the well and the pipe becomes empty.

To be able to raise the water, we usually have to provoke it by pouring water on the machine.

Water pump or pipe clogged. If a water source is available and there are no leaks in the pipes, the water may not be flowing due to a blockage.

The sound of the water pump is buzzing and there is no pressure

A buzzing, tension-free water pump is usually the result of three things:

The water pump motor does not turn. The pump dynamo that does not turn may be caused by a dry plug or clog.

The pumps are crisp and dirty. The build-up of residue or scale and dirt on the pump can disrupt and slow down the rotation of the water pump motor.

This will trigger a hum in the engine.

Unstable electrical voltage. If the voltage in your home fluctuates, it can also cause the pump motor to hum.

Damage to the capacitor. The capacitor is a coil that works to help turn the pump motor. Damaged water pump motor capacitors can be replaced, and the price is very cheap.

The water pump motor does not stop automatically when the tap is closed

The sound of the water pump motor is humming and there is no pressure.

A humming and unstressed water pump is usually the result of three things:

The dynamo doesn’t rotate. The pump dynamo that does not rotate can be caused by a dry plug or clog.

Pumps are crusty and dirty. The build-up of residue or scale and dirt on the pump can cause the motor rotation to be disturbed and slow down. This will trigger a hum in the engine.

Unstable electric voltage. If the voltage in your house fluctuates, it can also cause the pump engine to hum.

Damage to the capacitor. The capacitor is a coil that functions to help rotate the motor on the pump. Damaged water pump engine capacitors can be replaced and the price is very cheap.

The water pump motor starts/stops continuously

The water pump motor that keeps turning on and off (tick-tick) often occurs when we don’t open the tap or it can happen just after we close the tap. What are the causes?

There is a leak in the pipe. The high water pressure setting on the engine will cause the engine to start easily even if there is a small leak.

The water tube of the machine is leaking or full. The tube of the water pump machine is very easily prone to leakage if it has been used for a long time. Small leaks can cause the motor to start and stop continuously. To remedy this problem, you can plug the leak and then drain the water into the tube.

The water pump must be primed each time it is started

If every time you turn on the water pump, the water does not flow and you have to constantly prime it, this problem can be solved by checking:

If there is a leak in the inlet pipe circuit. Leaks in the inlet pipe that enter the well will cause the pipe to empty.

Faulty valve. A damaged water pump engine valve will cause the water pump to be unable to hold water in the suction pipe.

Well, above we have presented various common problems that often occur in water pumping machines. Now let’s move on to the cause of a dead water pump motor.

What Causes a Dead Water Pump Motor?

The existence of domestic problems often hinders work.

One of the things that housewives have often encountered is the sudden stoppage of their water machine.

Given the importance of water pumps to our needs as a source of clean water in the home, we are surely confused about how to deal with a non-functioning water pump motor?

A dead water pump is not a new problem in domestic issues.

It is normal and often found in all types of water pumping machines.

Mum is confused but before concluding the cause of the dead water pump motor, it is better to know a little more about the cause of the stoppage of our water pump at home.

Indeed, many causes make the water pump stop completely. Here are some of the explanations we have prepared for mum.


The power cable is cut

Mom, as a first step, should try to check the cable section.

If you find a broken power cable, it might have made Mama’s water pump die.

The absence of electricity is connected to the cause of the water pump not turning on.

So, to fix this, you can also check the power cable for the water pump at home and make sure nothing is disconnected.

Don’t forget to ask your husband for help to check the pump socket and the power source.

Stop faucet closed

The second cause of death of mum’s water pump machine is this: a closed faucet can also cause the water pump to not work, you know.

then, Ma, opening the closed faucet will automatically make the pump work.

The reason is that when the pressure becomes higher because the faucet is closed, it will make the pump automatically cut off the electric current which makes the water pump stop.

Ma can take the right action, which is to immediately open the closed faucet so that the water can flow again.

The capacitor is damaged

In addition to checking the cable or turning on the faucet, Mama and her husband can check the capacitor which plays a big role in driving the dynamo rotation.

The water pump motor does not stop automatically when the tap is closed

If there is a damaged capacitor, the water pump motor will not be able to rotate.

Where? do you know? Damage to the water pump capacitor can be sensed from the sound of holding when the water pump is turned on, listen.

When it sounds like a buzzing sound, the dynamo doesn’t move and just makes a stifling sound.

With this sound, Mama must immediately replace it with a new one.

Automatically stop the pump

Another way to find out the cause why the water pump machine is broken may be the presence of an automatic part.

However, there are two types of automatic water pump machines, the first is the automatic water pump in the pump engine and the other is the automatic part on the buoy radar.

Then immediately carry out the electricity by connecting two cables that lead to automatic, if the pump starts when the cables are connected, then you can be sure your Mama’s water pump is automatically damaged.

So Mama can automatically replace the water pump with a new one.

The dynamo caught fire

If a dynamo motor is found that is burning, it is the cause of the water pump to die completely.

The windings in the dynamo are usually cut due to the effects of burning.

Ma, make sure to check the dynamo windings by looking at the dynamo fuse first, okay?

If it is damaged, Mama can replace it immediately, but if the coil looks burnt then the motor dynamo coil must be rewound or replaced.

To make repairs to a dead water pump engine, Mama can find out the 5 causes above to make it easier for us to check further.

How to calculate the usage power of a water pump?

The use of a water pump in a house is more of a tool for distributing water to meet the daily needs of the residents of the house. Broadly speaking, two ways are often used, full use and certain needs.

The meaning of full use is to rely on the existence and function of a pump as a tool for distributing water for all the needs of water use for the residents of the house.

Meanwhile, the definition of usage for certain needs is that water pumps are used only to meet the needs of water usage at certain times and purposes.

Currently, many water pumps on the market are equipped with an automatic start-stop feature. This feature makes it easy to use the pump without worrying about “overload “due to the water pumps motor that never stops.

That way, the pump running for water use can take place at any time by anyone in the house.

Everything runs automatically without the slightest supervision.

Because it can be used anytime and by anyone, no one can be sure when the pump should or will be turned on and off.

If you cannot determine the time of on and off, you will never know how much electricity has been used to power the pump in a day.

Wow … when did the pump just turn on, we didn’t know.

The question is, how to calculate the power consumption of the pump used in this way?

Water Volume as a Basis for Calculation

The basis for the most sensible calculation is to use the ratio of the total volume of water used by the occupants of the house.

The total volume of water usage in a day in a house with 4 people, in general, is 790 litres¹. So, in a day, the average water consumption of one resident of the house is 197.5 litres.

One-third of the total usage of 1 person is used for the needs of the toilet (bathing-washing-toilet).

Fifty litres of the toilet needs, used only for latrines.

The remaining two-thirds apart from the toilets are used for other needs, such as drinking water, processing food or watering the garden.

I tried to cross-check the volume of water consumption at home by recording the numbers printed on the PAM water meter on the 1st of the current month and the 1st of the following month. The difference between the final recording value and the beginning is divided by the number of days in the current month and the number of residents in the house, and then the average usage volume of water per person in a day will be obtained.

The value that I get from this recording action is 233 litres per person in a day (7 m³ or 7000 litres divided by 30 = 233 litres).

I will use this 233 litres value as the basis for calculating the power consumption of the water pump in the next lines.

Calculation based on water usage per day

After getting the value of the volume of use in a day, it remains only to look for the water pump capacity specifications in distributing water.

The specification of the pump capacity for distributing water per minute can be found in the writing on the outer surface of the packaging box.

Or, a description of the pump specifications on the pump usage manual sheet.

The criteria for pumps that are commonly used in residential homes are shallow well pumps.

Generally, the criteria for such a pump capacity value are in the range of 35 litres per minute with electricity consumption of 350 VA per hour or 350 x 0.8 = 280 Watts per hour (0.8 = power factor value).

So, to produce 233 litres of water per day, the pump takes as long as:

= 233 liters / 35 liters per minute

= 6.6 minutes.

The electric power required to operate the pump for 6.6 minutes is:

= 280 Watt x (6.6 minutes / 60)

= 280 Watt x 0.11 hour

= 30.8 Watt


= 30.8 Watts / 1,000

= 0.0308 kWh

Thus, the electric power needed by the pump to accommodate the use of a volume of water of 233 litres per day is 0.0308 kWh.

If the calculation is implemented for water consumption in a month, then it becomes:

= 0.0308 kWh x 30 days

= 0.924 kWh.

For usage for a month in a house with 4 occupants, this will be:

= 0.924 kWh x 4 people

= 3,696 kWh.

Here are some other frequently asked questions related to the water pump motor

So far we have addressed the issues relating to the various problems that the water pump motor could have.

Now to wrap up we will generally go over another question that consumers might ask you when making a purchase.


What are the different types of water pump motors?

There are two different types of engine namely:

Mechanical motors and electric motors.

Mechanical engines are the types of engines that run on gasoline or diesel fuel.

On the other hand, electric motors work with electric currents.

How long does the submersible Water pumps motor last?

It usually lasts between 15 and 20 years.

On the other hand, a pump remains a mechanism and, like all good mechanics, several factors come into account when it comes to its lifespan.

Is its use only residential or is it for other purposes? Is its expansion tank the right size and properly adjusted?

Is it a good quality pump?

Is my water pump motor powerful enough?

This obviously depends on the strength of the motor and the galling of the pump, but also on the depth of the well, the water level, the quantity of water that the well supplied the desired pressure, its wear and its type of use.

It is easy to verify if the pump is suitable for the current installation with a few tests. In addition, during installation, each pump should be installed according to the manufacturer’s curve.

Is there any special maintenance to be done on my submersible water pump motor?

There is no maintenance to be done directly to the water pump motor, other than checking the air in the expansion tank for the desired pressure adjustment.

How to read the label of a water pump motor?

Let’s learn how to read the label of a pump

Horses represent a value to estimate the power of a pump and are expressed with the acronym HP – an acronym for horsepower- The same action power can be expressed in kilowatts and is indicated with the abbreviation KW.

To find out how many HP data KW corresponds to, you will need to use conversion.

Knowing that 1 HP equals 0.7457 kilowatts, to get an accurate estimate it will be sufficient to perform the following proportion:

1: 0.7457 = the reported number of HP: X

Consequently, assuming that the pump to be analyzed is 2 HP, we should perform the following calculation:

2×0.7457 / 1

If, on the other hand, we know the number of kilowatts of the electric pump, for example, 7, and instead we wanted to know how many HP they correspond to, we should perform this proportion:

1: 0.7457 = X: 7

Consequently, the correct calculation to know how many HP the pump is this:

7×1 / 0.7457

Another piece of information that we can deduce by looking at the code on the label is the type of pump power supply.

In the case of a single-phase pump, there will be a code type 1×220 / 230, in the case of a three-phase model, it will instead be 3×220 / 230.

Instead, we remind you that, if we are interested in knowing the Volts absorbed by an electric pump, they are 240v, in the case of a single-phase pump and 400 volts, in the case of a three-phase pump.

Also on a graphic level, to distinguish a single-phase from a three-phase starting from the reading of the label or tag, if you prefer, just observe the final letter which will be M, in the case of a single-phase pump and T, in the case of a three-phase.

In some models the weight is also reported but, unless there is some particular need, it is a rather irrelevant figure, except for the estimate of shipping costs.


We are at the end of this series of information on frequently asked questions about water pump motors.

This article is a guide you can consider visiting whenever you need to answer questions consumers might have about water pump motors.

Besides, if you have any other concerns or want to acquire suitable submersible pumps for your needs, HANGGE is one of the leading water pump manufacturers in China which will best meet your needs and much more.

Do you have any questions?

Please feel free to let us know or contact us directly.

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