What Causes A Noisy Pool Pump?

Everybody hates a noisy pool pump, and it includes you and your neighbors. The screeching of the bearings can annoy people regardless of where is the placement of the actual pump. Aside from that, it can cause serious issues in your pool and with how your neighbors will treat you. If it is running loud, the first thing you need to do is to listen to the sound and figure out where it is coming from.

What causes a noisy pool pump? If your pool pump is becoming noisy, it might be the motor’s bearing that is malfunctioning and needed a replacement. If the failing bearing is not replaced, it can cause the motor to overheat and the windings to fail.

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In this article, you will find about the causes of a noisy pool pump and what are the necessary actions needed to fix it.

The Causes Of The Loudness

A lot of people conclude that it is the vibrations that are causing the rotor of the pool to produce some noisy sound. Though it might not be the rotor that is at fault here, there are many other causes. You should consider a lot of things when trying to find out the probable cause of the noise. It is because each of them has a distinct frequency.

Pump Bearing Problems

Bearings can play a vital role in the loudness issue of your pool. Typically bearings are located onto the pool pump motor to limit the friction as the electromagnets are responsible for the motor shaft to spin.

But when the rolling elements start to wear off, vibrations will be the output. You’ll find the number of bearing falls or rollers to be the culprit that causes the vibrations. The manufacturer of the bearing can verify it.

Bent Pump Shaft

A bent shaft causes high axial vibrations in the pump. You’ll notice that if the bend is near the shaft center, certain vibrations can be produced at 1X RPM. These dial indicators are best-used to identify a bent shaft in a pool pump.

Misalignment Of The Shaft

Vibrations are perfectly normal, as it is how pool motor works. It creates vibrations to work properly. But it takes a professional to be able to differentiate the normal ones from the excessive ones.

It is true, especially to the misalignment of the shaft causes excessive vibrations. They can also predict how far it can affect the overall performance and the reliability of the pool itself.

You can generally diagnosed a misaligned shaft by excessive oil leaks at the bearing seals, some heat discharge oils, excessive coupling, cracking of the shafts, different high temperatures near the bearing, and excessive axial or radial vibrations.

Imbalance Of The Pump Impeller

The imbalance of pump impeller can mean a lot of things. One of them is that severely loud noises and vibrations can cause it. It can make your pool pump overheated, misaligned, and have a bad bearing.

Ultimately, you will be able to figure out excessive vibrations to it, and it is essential to know that this can cause some severe damage to your pool system. It can be manifested in the seizing of the poop pump, mechanical packing failures, and the deflection of the shaft.

A centralized poop pump impeller can cause more of a force imbalance compared to a couple of imbalance.


Pump cavitation happens when the net positive suction head becomes insufficient. The normal behavior should be that the pressure of the liquid in the impeller should not approach the liquid-vapor.

It is what prevents some pockets from forming and then collapsing as they pass the impeller. Eventually, the contrast will happen, and the cavitation occurs. The cavitation is the one who causes the vibrations in the pumping system.

In simpler terms, the pump is starved of water while the impeller continues to spin. As they spin gradually, it can cause some loud clattering sound and excessive vibrations. It can be identified by a rumbling rock sound or some popping noises inside of the poop pump.

Pump Flow Pulsation

The pool pump should be working when it is near the shut-off head. It happens when the pump continues to run with the discharged valve still closed. If it is left unattended, the pump flow pulsation will be most likely happen, leading to the vibration of the pump itself.

The lack of proper feed is one of the major causes of pulsation. It also includes leaking valves, worn packing, piping designs that have a low restriction, spring rates that are improperly configured, and multiple pumps on a common header.

How To Get Rid Of A Noisy Pool Pump Motor

The pump motor is the one responsible for circulating water through your filtering system that keeps the water of your pool free of bacteria and debris. It is the main core of the filtration system. When operating a pool pump, the noise it creates should be on the lower decibels, and it should be more at least bearable.

But when it becomes louder, it is a sign that something is wrong on the inside. Aside from that, it is also a clear indication that the filtration system is jeopardized.

The good news is the problem can be fixed with simple inspection and proper maintenance. Here are some of the solutions and some proceedings you can implement to have your pool pump back in action.

Check the Water Level

If the water level decreases to mid-height, the air might be getting into the filtration system of the pool. When the air gets inside, it meddles with the pump’s vacuum environment that is responsible for filtering the water.

It puts a strain in the poop pump and, as a result, conveys a heavy sound as it keeps on working. Adding water to the pool might be the easiest solution to this problem. The water should be on the level up to the third skimmer faceplate.

Pump And House Filter Should Be On The Same Level

Having installed the pump and the filter base on the same level can have a big impact. If the filter system is on an uneven structure or ground, the internal parts of the pool pump will cause the filter and the motor to vibrate.

In pool construction, it is ideal to have even ground level to avoid this scenario. It is essential to know that to get rid of the noise. You need to secure first a solid base for the system to work correctly on their own.

Skimmer and Pump Basket Should Always Be Clean

Sometimes it is more on the simple things. You can prevent getting noise issues because of your poop pump by always clearing the pump and skimmer basket with a garden hose.

But if your pump and skimmer basket is dirty, the motor has to work twice as hard to make to get the water from the pool and push it forward to the filter. When a poop pump motor is overworked, it can lead to excessive vibrations and can make a loud noise.

Examine And Clean The Pump Impeller

Same with the skimmer and pump basket, the pump impeller should be clean and examine as well. In order to do this, you are required to turn off the filter, remove the plug, and open the pup basket.

Pull out the pump basket and reach out to the tube leading from the pump towards the impeller itself. You can feel if there’s any debris into it or if it is wobbly. Too much debris and wobbliness can cause the pump to make loud noises.

Replace Bad Bearings

At some point, there’s not much anything you can do to prevent some noises generated in your pool pump. There’s a big chance that if you encounter any noise that becomes unbearable, it might be the perfect time to have a replacement of the bearings.

Replacing bad bearings will be a good idea since the first one you have it was when your pool was originally built. Professionals should do it, so it is essential to contact your developer or any local technician available in your area to work on with your pool pump motor.


Overall, if the noise of your pool pump becomes excessive, it is their way of saying that there is something wrong happening inside. Listen carefully to the noise it produced, and you will have an idea of what or where the fault will be. Once you identified the cause, it is time to implement some solutions that will help you to get it back to normal.

These are the simple but essential steps that you should be taking to have your pool pump working correctly again. It might not be the easiest for the most part, but you can always call someone in order to assist you in times of need. The key is to keep everything clean and always remember that your safety is the priority.

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