How To Solve Upflush Toilet Problems?

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Last Updated on August 9, 2022 by acechapman

An upflush is a toilet that has a macerator inside a small, compact tank. It sits behind the toilet bowl. A small cutting blade is part of the macerator that activates automatically when you pull the lever. The blade rotates to transform solid waste into a uniform liquid solution. The macerator’s pump eventually discharges the waste and the tank is ready for use. They have many advantages, despite the numerous upflush toilet problems that some users may experience.

Another benefit is the toilet’s ease of installation. You can place your new upflush toilet in any location, even the attic or basement. Additionally, upflush toilets can be easily installed and maintained for a low cost. These toilets can be easily moved and can take up the same amount of floor space as regular toilets.

How To Solve Common Upflush Toilet Problems

You should be aware that buying an upflush toilet will bring you a lot of challenges. This guide outlines the problems and possible solutions.

upflush toilet problems

Foul Smell

When used for long periods, upflush toilets can produce a foul odor. After a time, limescale can form in the macerator tanks. The macerator tank is low in the water so limescale and solid waste can form. This can lead to an unpleasant odor.


Sometimes, you can solve the problem by descaling your toilet. To properly decal your toilet, read the user manual. You can then use white vinegar to clean the macerator tank. Leave it there for around 120 minutes before flushing the toilet.


Clogging is another common problem for upflush toilets. They are not equipped to handle human waste, urine, or toilet paper. The macerator tank will eventually clog if any other substance is introduced. It is possible for the macerator pump to get stuck during this process. The toilet may flush multiple times if either the pump or the macerator shredder malfunction. It can be very difficult to stop.

Debris can also block the discharge pipe of the tank, causing the pump to run indefinitely without emptying the macerator tanks. If wastewater is coming out of the drains in bathrooms that have an upflush toilet, it can indicate that the tank has become clogged.


The cause of the blockage will determine the feasibility of finding a solution. These solutions could include:

  • An upflush unit can be purchased that has a grader built into the macerator. The grader can be used to remove any hard objects that might clog your toilet.
  • If your toilet flushes frequently, unplug it. Then, lift the macerator tank lid and use tongs or other pliers to manually remove any foreign objects. For inspection and maintenance, remove any foreign material from the pump.
  • It is best to call a plumber if the debris has become stuck in the tank’s drain pipe. A blockage can also occur if the tank is exposed to extremely low temperatures. You should wait for the daily temperature to rise in such cases.
  • If the pump stops working suddenly and the wastewater is flowing back into your bathroom drains, it’s worth checking if the power outlet has tripped.

Excessive vibration and noise

Upflush toilets are prone to noise and vibration. Disintegrable foreign debris, which then impedes the blade’s movement, is the main culprit.


You must first disconnect the power cable from the pump to cut off its power supply. Then, remove the lid from the macerator tank to inspect it. Clear the macerator if it is blocked after inspecting it. You will need to use thin-nosed, flexible pliers to turn your macerator blade clockwise and remove any foreign objects.

The Macerator Pump Continues to Firing at Random Intervals

If you own an upflush toilet and the macerator pump keeps randomly starting, it is possible that this problem occurs. A defective micro-switch can usually cause this problem. The rubber membrane that activates the switch may be defective. If the membrane is damaged, it can then cause waste to enter the micro-switch. Thus, causing disruptions in its normal function.


When debris is caught between the floor and micro-switch, a micro-switch may become not functional. The micro-switch will not function properly if the macerator tank has become full. To solve the problem, first, empty the tank and clean out any debris. To ensure that the pump is working properly, turn off the power supply and restart it.

You should replace the rubber membrane with the micro-switch if it shows any damage.

The Macerator Pump Foaming from Vent

Macerator foaming is another common problem in upflush toilets. This is a common problem with upflush toilets. It’s usually caused by bleach and cleaning detergents.


First, replace the membrane protecting the micro-switch. The membrane can become loose over time as the rubber wears down. If the solution does not work, replace the whole micro-switch.

Frequently Asked Questions (FAQs).

Are upflush toilet toilets durable?

Today’s upflush toilets are extremely durable. Also, the warranty provided by manufacturers of upflush toilets is on average ten years.

Do you need extra for an upflush toilet on a bathroom floor

Not necessarily. Because the macerator tank is located behind the toilet bowl, an average upflush toilet takes up about the same amount of floor space as a regular one.

Is there a smell from an upflush toilet?

Upflush toilets are more likely to have a foul odor than regular toilets and require frequent cleaning and maintenance.

Wrapping up

This guide should have helped you to understand your upflush toilet. Thus, giving you the knowledge to deal with any potential upflush toilet problems. We welcome your comments and suggestions in the comment section below.

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