Macerating toilets are well-known for their space-saving design and efficient waste removal system. Unlike standard gravity-fed toilets, these units use a powerful motor and rotating blades to grind waste and pump it through narrow pipes to the main sewage line. While they offer great convenience and flexibility, noise is one common issue that raises concern among homeowners.
Macerator toilets have a reputation for being noisier than traditional toilets, which can be quite bothersome, especially during nighttime use. If your macerating toilet is making a loud or unusual noise, it’s often a sign that something is wrong within the system.
So, Are Macerating Toilets Really That Loud?
Not all macerator toilets are excessively noisy, but certain models, poor installation, or lack of maintenance can increase the sound level. The noise typically comes from the motor, blades, or vibration against surfaces, and sometimes even a bad odor can accompany the noise if the system isn’t functioning correctly.
Common Causes of Noise in Macerating Toilets:
- Motor malfunction
- Worn-out or damaged blades
- Clogged or obstructed macerator pump
- Old or faulty seals
- Overfilled waste tank
- Air trapped in the pipes
- Incorrect installation or misalignment
- Defective or broken check valve
- Foreign or hard objects stuck in the macerating chamber
- Improper water flow – either too high or too low
- Kinked or damaged discharge pipes
- Vibrations from loose mounting against walls or floors
- Degraded pump bearings
- Electrical connection issues
- Use of low-quality or incompatible replacement parts
- Worn-out rubber or plastic components
Effective Solutions to Reduce Macerator Toilet Noise:
- Install sound insulation: Surround the macerator unit with acoustic panels or foam to muffle vibrations.
- Use a noise-reducing cover: Specialized covers are available to dampen operational noise.
- Perform regular maintenance: Clean the system and keep the blades sharp to avoid strain and unnecessary noise.
- Create a false wall or cabinet: Enclosing the unit behind a wall helps isolate the sound.
- Upgrade to a quieter model: Newer models are often engineered for low-noise performance.
- Mount with anti-vibration pads: Reduce noise transfer by using vibration-absorbing materials.
- Keep the bathroom door closed: A simple but effective method to block sound.
- Install a pre-tank or buffer tank: Helps reduce sudden water flow and noise.
- Blade adjustment: Make sure the cutting blades are properly aligned and functioning smoothly.
- Schedule toilet use wisely: If the noise can’t be completely eliminated, use it during hours when it’s less disturbing.
Is Noise a Common Issue with Macerator Toilets?
Yes, macerating toilets are generally noisier than standard gravity toilets. These toilets use a high-powered pump and a set of macerator blades to grind waste before flushing it through a narrow pipe. During operation, this mechanism can produce noticeable noise, especially when the pump is actively grinding waste and pushing it through the system.
In comparison, traditional gravity toilets flush waste using natural water pressure and gravity, which creates significantly less sound. Macerating toilets, on the other hand, can emit mechanical noise that some users find disturbing—particularly in quiet environments or during nighttime use.
The typical noise level of a macerating toilet is around 50 decibels, although newer, more advanced models are designed to be quieter, operating between 40 and 45 decibels. However, if the blades encounter resistance due to clogs or worn-out components, the noise can intensify, sometimes sounding like the unit is vibrating, shaking, or malfunctioning.
Why Do Macerating Toilets Make Noise?
The noise from macerator toilets is mainly due to:
- The motorized pump
- Rotating macerator blades
- Vibrations during operation
- Potential blockages or mechanical faults
If the unit makes unusually loud or irregular noises, it may indicate an internal blockage or a faulty component that requires maintenance. When the blades are obstructed or malfunctioning, the system can produce sharp grinding or rattling sounds.
How to Reduce Noise from a Macerating Toilet
Although macerating toilets are inherently louder due to their mechanical nature, there are several ways to minimize the noise:
Install Soundproofing Around the Macerator Unit
Placing soundproofing materials—like acoustic panels or insulation foam—between the macerator and surrounding walls or floors can significantly reduce noise transmission. Consider using soundproof spray foam or installing a sound-insulated cabinet if the unit is installed behind a wall.
Use a Rubber Anti-Vibration Mat
Macerators can create vibrations that amplify sound, especially if installed on a hard surface. Placing a rubber anti-vibration mat beneath the unit helps absorb these vibrations and minimizes rattling. These mats are inexpensive, easy to install, and highly effective at dampening noise.
Perform Regular Maintenance and Descaling
One of the most common causes of loud noise in macerating toilets is build-up around the blades. Over time, waste materials and mineral deposits can accumulate and clog the system, causing the blades to struggle and make louder grinding noises.
To fix this:
- Use a descaling solution specifically designed for macerator toilets.
- Run the solution through the system regularly to remove build-up.
- Contact a plumber or technician if the noise persists, as internal components may need cleaning or replacement.
Final Note:
While macerating toilets offer flexible installation options—especially in basements or places where traditional plumbing is not possible—they do come with the trade-off of being noisier than standard toilets. However, with proper installation, soundproofing, and regular maintenance, you can greatly reduce the noise from macerating toilets and enjoy their convenience without the unwanted disturbance.
Are Macerating Toilets Noisy? Common Issues You Should Know
Macerating toilets, also known as upflush toilets, are an innovative solution for homes where installing a traditional plumbing system is challenging. However, despite their convenience, these toilets come with a few common drawbacks. Let’s explore the most frequent problems associated with macerator toilets, especially if you’re wondering, “Are macerating toilets noisy or troublesome?”
1. Highly Dependent on Electricity
One of the major disadvantages of macerating toilets is their reliance on electricity. The macerator pump runs on power, and if there is a power outage, the toilet becomes non-functional. This makes it unsuitable for areas with frequent blackouts unless you invest in a battery backup system. Without power, waste cannot be processed or pumped, which can lead to significant inconvenience and hygiene issues.
2. May Offer Limited Benefit in Homes with Existing Plumbing
In many residential homes, traditional gravity-fed toilets connected to a standard sewage line already exist. Installing a macerator toilet in such cases may not provide much added value and could even disrupt the overall plumbing flow. Since each home is usually connected to a centralized drainage system, a sudden addition of an upflush toilet might cause backflow or technical mismatches if not properly integrated.
3. Prone to Clogging
Macerating toilets are more susceptible to clogging than standard toilets. The grinding blades inside the macerator unit can become jammed if inappropriate materials are flushed. Items like feminine hygiene products, baby wipes, paper towels, or too much toilet paper can overwhelm the pump.
4. Flushing and Tank Complications
The flushing mechanism in macerator toilets involves a pump system and holding tank, which can be delicate and more prone to issues if not used regularly. Infrequent use may cause mechanical problems or allow solid waste to harden, affecting the blades and impeller function.
5. Unpleasant Odors
Since macerating toilets use less water per flush, odor control can be an issue. The reduced water flow may leave behind waste residue, and gaps between the tank and pump can allow foul smells to escape. Poorly sealed connections or infrequent flushing may exacerbate the problem.
6. May Violate Local Building Codes
Not all macerating toilets are legal in every area. Some local plumbing or building codes prohibit the use of upflush toilets in primary bathrooms or certain types of properties. Installing one without checking these codes can result in fines or issues during home inspections.
Which macerating toilet models rarely make any noise?
#1 Saniaccess 2 Macerator Toilet
The Saniaccess 2 is one of the top-rated macerating toilets that operates with minimal noise. Powered by a 1/2 HP thermally protected motor, this toilet provides fast and effective waste removal while maintaining a noise level under 53 decibels—quieter than most household dishwashers.
Key Features:
- Ultra-Quiet Operation: Emits less than 53 dB during operation, making it suitable for homes where noise is a concern.
- Efficient Waste Handling: Effectively breaks down human waste and toilet paper.
- Vertical Pumping Capacity: Can pump waste up to 15 feet vertically and 150 feet horizontally, making it ideal for basements and locations below the main sewer line.
- Powerful Shut-Off Head: Offers a maximum shut-off head of 17 GPM.
- Complete Toilet Kit: Comes with a full-size toilet bowl and tank combo for convenience.
- Ventilation Support: Includes vent connections to remove odors, with the option to add a mechanical vent if needed.
- Durable Construction: Features a robust non-return valve on the discharge elbow to prevent backflow.
The discharge system is well-designed, with a 1-1/2″ inlet pump housing and a solid discharge elbow that supports long-term durability. Its odor-eliminating vent system keeps the bathroom fresh at all times.
#2 Venus Silent Macerating Toilet
If you’re looking for a completely silent macerating toilet, the Venus Silent Macerating System is an excellent choice. Its design prioritizes noise reduction while delivering powerful waste removal performance.
Why Choose Venus Silent?
- Whisper-Quiet Operation: Specially engineered for near-silent performance.
- High Power Output: Equipped with a 600W motor and 34 GPM flow rate for smooth waste discharge.
- Non-Clog Stainless Blades: Heavy-duty blades handle solids with ease and resist clogging.
- Strong Build Quality: The bowl and tank are crafted from premium-grade materials to ensure long-term use.
- Rear Discharge Design: Allows for easy installation in tight spaces.
- Dual Flush System: Saves water while offering flexible flushing options.
- Compact Installation: Works with 4″ diameter pipes and a 5″ bell housing, minimizing noise during waste transfer.
Thanks to its sleek design and advanced engineering, the Venus Silent toilet is perfect for small bathrooms, apartments, or homes where plumbing noise is a concern.
Conclusion: Are Macerating Toilets Loud?
While older models of macerating toilets were often associated with loud gurgling and grinding noises, modern macerating toilets like Saniaccess 2 and Venus Silent have significantly reduced operating sound. These quiet units are a great choice for eco-conscious homeowners, saving water and requiring minimal maintenance.
However, noise issues can still occur if the blades become clogged with foreign objects or mineral buildup. If you hear rattling, humming, or gurgling, it may indicate a need for cleaning or repair. Persistent issues should be addressed by a licensed plumber.
So, are macerating toilets noisy? Not if you choose the right model. With quiet operation, efficient performance, and odor control, today’s top-rated macerating toilets offer a smooth and peaceful bathroom experience.
We are really lucky to have a hard-working, multi-skilled plumber on our team. Collin D. Gallegos, a professional plumber who has worked with us since 2012, is an expert in vent, septic, and drainage systems. He is a Certified Master Plumber and has worked on various commercial plumbing projects. He usually helps our readers resolve plumbing and pipe-related issues with a proper DIY troubleshooting and repair guide.