How to Soundproof a Macerator (3 Easy Steps)

If you have a macerator in your home, you know how annoying it can be to hear it running whenever someone flushes the toilet or does laundry. It’s even worse if you live in an apartment building with thin walls and other tenants who are also trying to soundproof their macerators. 

The most effective way to soundproof a macerator is by using a water-based soundproofing spray. This type of spray works by creating a barrier between the macerator and the surrounding area. The barrier will stop vibrations from coming through from the machine and make it much quieter.

The amount of noise a macerator can produce is very high. They are noisy to operate, even when housed outside the property. They produce sound levels of over 85 dBA when installed indoors, which can be extremely loud.

In this article, I’ve explained a step by step process that will help keep your macerator quiet without breaking it.

Step by Step instructions to Soundproof a Macerator

Step by Step instructions to Soundproof a Macerator

Step 1: Remove the macerator

The first step is to remove the macerator from the wall, so that you can access it more easily. To do this, remove the cover by removing all screws that hold it in place. Then, take out all bolts that hold the macerator to your wall and then set them aside.

Step 2: Soundproof using water-based soundproofing spray

Now that you have the macerator in place, it’s time to soundproof it. Since this process is pretty straightforward, I’ll just give you all of the steps at once:

  • Using a water-based soundproofing spray, coat the macerator from a distance of about 8 inches. Be sure to use even strokes and cover as much surface area as possible with each pass you make.
  • Let your spray dry for about 20 minutes before testing out its effectiveness by turning on your appliance again and seeing how much louder or quieter it sounds.
  • If it is still loud, then again apply the spray and test after 20 minutes. Repeat this process until the macerator will be adequately quieter.

Step 3: Install soundproofing kit

The third step is to install the soundproofing kit. Soundproofing kits are available at hardware stores and can be purchased for as little as $20.

The instructions on how to install a soundproofing kit will vary, but most kits require you to drill holes in the top of your macerator and fit rubber O-rings into them.

The O-rings should then be tightened down with nuts and bolts that come with the kit. If you follow these instructions carefully, you should be able to successfully soundproof your macerator using a soundproofing kit.


We hope that you have found the above information on soundproofing a macerator helpful. If you are still unsure about how to soundproof your macerator, we recommend speaking with a professional who can help provide more specific solutions.

Frequently Asked Questions (How to Soundproof a Macerator)

Can you soundproof a macerator?

The noise from a macerator is typically caused by the high-speed rotation of its blades. The best way to soundproof a macerator is to install a water-based soundproofing spray between the macerator and the wall. This will help absorb the vibrations that cause the loud noise and reduce it significantly.

How do you soundproof a noisy water pump?

To soundproof a noisy water pump, place it inside a box with acoustic insulation material, such as Roxul Comfort Board or Quiet Rock Sound Deadening Foam. If you want to cut down on the vibration further, you can also add some felt pads under each corner of the pump.

Why is my macerator so noisy?

The macerator is noisy because you don’t have enough water in the tank. The water acts as a cushion for the macerator pump. Without enough water, the pump will run at full speed all the time, which means more noise.

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Brendan Ratliff
Brendan Ratliff

As a soundproofing and acoustical professional, I have helped new homeowners, builders and remodelers with their projects. I also help contractors/designers learn how to properly install soundproofing in their clients homes.
I enjoy helping people understand the process of soundproofing and acoustical construction. is a one-stop solution for all of your soundproofing related questions.