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7 Common macerating toilet problems you can easily fix

Categorized as Toilets & Accessories
Common macerating toilet problems

Macerating toilets can be complicated to get used to since you may encounter a few problems here and there. This is why it’s important to know what might be causing your macerating toilet problems.

It could be a minimal clog in the pipeline that needs cleaning or simply an obstruction on the impeller blade. Other times it could be the toilet running continuously, foul odor, or the water level in the toilet bowl failing to go down when you flush.

So this article will walk you through some of these common macerating toilet problems and how to fix them.

Common macerating toilet problems 

1. Leaking

When you have a macerating toilet leaking, it is important to know the type of leak.

There are two types of leaks that can happen with this system – one is an internal seal failure and the other is an external leak.

With an internal seal failure, water will constantly be seeping from the back wall where your tank connects to the bowl.

You might also want to check the water level in the reservoir of the macerator (the tank where all the waste gets chopped up). This might not seem like an issue if you’re only having minor leaks or drips, but it can lead to major problems with flooding over time as more water enters into your system without being used.

You’ll need to call a plumber if this happens so they can replace parts in order for it not to continue happening over time.

An external leak could just require tightening connections which would take five minutes on your part or less depending on how many connections you have.

2. The toilet is running continuously

If your macerating toilet is running continuously, there are a few things you can do to fix the problem.

Check whether or not any buttons on the front of the tank have been pushed and if so, make sure that they’ve been pressed in all the way.

Also, open the cover on top of the fill valve by turning it counter-clockwise with an Allen wrench or screwdriver (slot near the bottom).

You may need to also turn off power at the breaker box for a short period of time by flipping breakers until it stops running before turning them back on again.

If this doesn’t work, reach out to a professional as soon as possible because other parts might be broken or damaged which will require more extensive repairs.

See also: Upflush toilets pros and cons 

3. Foul odor coming from the toilet

Macerating toilets are designed to reduce bad odors compared to traditional toilets.

This is because they tend to grind the solid waste into a slurry before it is flushed down through an outlet and into the drain.

This means that there is less surface area for bacteria to grow on when they are not confined inside one large chunk of solid waste.

However, the only thing you may notice is a faint sewage smell when you first use them – but this should dissipate after just one day. If it doesn’t happen, it could be due to a plumbing problem that may need to be fixed by a professional.

4. The water level in the bowl doesn’t go down when you flush it

There are a few things that could be going on with the macerating toilet water level not going down when you flush.

The first thing is to check if there is any debris in the bowl or clogging up your pipes. If this seems to be an issue, try cleaning out any gunk and then running some hot water for about ten minutes before flushing again.

During winter the waste pipes could be frozen. So running hot water through them will help to melt the ice and unclog anything further back in the pipe which may have been causing problems.

In addition, it will help to get rid of any smells from sitting too long inside your drain pipes and causing a foul odor.

See also: How to unblock toilet paper clog

5. You can hear gurgling or humming noises 

The humming or gurgling noises your macerating toilet is making could be a sign that there’s something wrong.

The most common culprit is small rocks or debris in the trap way area of your system, which can cause a vibration when water passes through it and into the tank.

Other potential causes include loose bolts, not enough water pressure to fill the reservoir, incorrect plumbing connections on either end of the pipe going into or out of the tank.

To determine what’s wrong with your system you’ll need to turn off power to any electrical components associated with using (or flushing) your toilet for about 10 minutes. Clear out any obstructions and then flush so there is no air left inside before turning back on the power again.

6. Bubbles in the bowl

Macerating toilet bubbles in the bowl can be caused by an excess of air from your pipes. The reason for these bubbles is due to air being released from the drainpipe or because of an open vent line.

This could be due to a clog somewhere in the plumbing system that needs to be cleared out immediately.

7. Takes too long to refill after flushing

Macerating toilets are designed to handle a lot more than just liquid waste.

They can also be used for food scraps, which is why they take longer to refill after being flushed.

If you’re looking for relief in the bathroom and your macerator toilet seems like it’s taking too long to fill up again, try adding some water from the sink or bathtub.

This will help flush out any small bits that might have been left behind by larger items. Also, it helps to rehydrate all of the contents within your toilet bowl. You may find this makes flushing easier on your next visit!

See also: Ways to avoid poop sticking on the toilet bowl


Macerating toilets are a great option for people who want to live in an eco-friendly home. They save water, require less maintenance than standard toilet systems and they’re more comfortable to use because the bowl remains at a constant level with no need to refill it after every flush.

These benefits may not be enough though if your macerator is experiencing any of these problems – leaking, running continuously, or making unusual noises like gurgling sounds when you flush.

If this is happening, we recommend having professional plumbers come out right away to diagnose your macerating toilet problems. This will get your system back up and running quickly so that you can enjoy all of the benefits mentioned above without interruption.

By Becky Jones

Becky is a mother and self-proclaimed DIY enthusiast. She blogs about her latest projects, from fixing little things in the bathroom to big DIY hacks and tricks. When she's not writing or doing one of her projects, she keeps herself busy being a mommy.