How to Make Sump Pumps Quieter?

How to Make Sump Pumps Quieter
Sump pumps are useful tools, but they can sometimes be annoyingly noisy. So, how do you make sump pumps quieter? There are methods in doing so. In this article, we discuss some of these methods to silence these machinery without affecting their performance.

Prevention Methods in Making Sump Pumps Quieter

Before we start discussing procedures in lessening noise, you may want to know how to avoid installing noisy sump pumps in the first place. These are some of the things you can do:

1. Buying better sump pump models

High-quality sump pump models tend to have inherently less noisy motors. As such, if you buy a reliable model, you should have few or no problems with the machinery’s noise.

Additionally, buying a better sump pump will gain you some other advantages. For instance, quality sump pumps tend to last for a very long time.

Read more: How many years does a sump pump last?

2. Regular Maintenance

Sump pumps are a piece of machinery. And, all kinds of machinery require sufficient repairs and maintenance. If your machine is poorly maintained, things like loose parts, accumulated gunk and dirt, and rusted hinges can cause undesirable noise.

In fact, noise is the least of your worries if you don’t properly maintain your sump pump. The worst case is that your machinery can actually fail, break down, and stop functioning entirely.
Learn more: What is the most common reason for sump pump failure?

Types of Sump Pump Noises and Solutions

Sump pump noises can come from different sources. Naturally, since the sources are different, the solutions are varying as well. We compiled a list of a few possible noise sources and their corresponding solutions so you don’t need to search for them individually. In this section, we finally discuss how to make sump pumps quieter.

Motor Noises

The most common noise source of sump pumps is their motors. This is especially true for older PVC models. If you failed to buy a model with a quieter motor, you may need to do something about it.

Your best bet in reducing motor noises is to isolate them. You can do so by covering the basin with a lid made of insulating materials. Insulators can block not only heat and electricity but also sound waves to a certain degree.
Some of these insulating materials include plywood, insulating foam, rubber stoppers, mats, and more. If you don’t have any of these, you can also use a thick fabric. Although it works worse, it still surprisingly blocks a lot of noise.

If you have done all of these and the noise is still unbearable, you don’t have a choice but to replace your sump pump. Newer models use a cast iron system which generates less noise. Therefore, if you are planning to replace your sump pump, you may want to choose one with this system.

Clanging Noises

Clanging noises are also common when it comes to sump pumps. Most of the time, the clanging is accompanied by a vibration. This further increases the amount of noise generated by the machinery.

In this scenario, the usual culprit is the discharge pipe. The pipe can strike the basin resulting in the vibration and the clanging noise. Sometimes, the pipe can also roughly brush against the nearby walls. Therefore, the solutions to this problem mainly revolve around dealing with the pipe.

1. Covering the pipe
This method is similar to the one dealing with the noisy motor. However, instead of covering the entire basin, you just insulate the pipe instead. By doing so, you reduce the noise the pump makes regardless of whether it strikes the walls or the flooring.

2. Covering the surroundings
Well, if you find it troublesome dealing with a moving pipe, you can instead cover the areas where the pipe is likely to strike or brush on. You can simply use rubber materials such as grommets and line them in the lid, walls, or basin whichever is possible and useful.

Slurping and Gurgling Noises

When you hear the word ‘slurping’ or ‘gurgling’, it most likely has something to do with liquids. Slurping noises in sump pumps can sometimes be caused by the drainage pipe. Gurgling noises, on the other hand, can be caused by a backflow of water. Here are things you can do:

1. Adjusting the pump switch
Imagine yourself slurping down a bowl of soup. When the bowl is almost finished, you may accidentally suck in some air alongside the soup. This can cause slurping noises.

This is the same thing that happens in drainage pipes. If the water level is low, the pipe can suck in air which results in slurping noises.

The solution to this is to adjust the pump switch so that it stops sucking in water whenever the water level reaches a low enough level.

2. Replacing the check valve
If there are gurgling noises caused by a water backflow, the culprit may be the check valve. Upgrading to a spring-loaded check valve is your best course of action. Spring-loaded check valves are very reliable in guiding the water to flow in only one direction, preventing any reverse flow.


How to make sump pumps quieter? Well, it depends. The most important part is to identify the reason for the noise. If you correctly identify the noise source, you can apply the most appropriate solution to the problem. Hopefully, after reading this article, you now know how to deal with the noise problem of your sump pump.

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