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Home » What are the common problems of wall-hung toilets, and how to solve them?

What are the common problems of wall-hung toilets, and how to solve them?

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If you are renovating your bathroom and want to add a touch of modern elegance, then a wall-hung toilet is just what you’re looking for. It is a stylish and space-saving option popular among users. However, it can encounter various problems. In this article, we will explore all the common issues of wall-hung toilets and learn how to solve them.

What is a wall-hung toilet?

A wall-hung toilet is mounted directly on the wall, with no bulky base taking up precious floor space. Instead, it’s sleek and stylish, creating a clean and minimalist look in your bathroom. Eliminating the floor-mounted ground makes a more open and spacious feel in your bathroom. It’s perfect for smaller bathrooms or sleek and modern design.

Critical components of a wall-hung toilet

A wall-hung toilet consists of two main components:

  • Toilet bowl
  • Concealed cistern

The toilet bowl is attached to a sturdy metal frame securely mounted to the wall. The concealed cistern holds the water for flushing and is installed within the wall cavity behind the toilet. This concealed installation gives the bathroom a clean and minimalist appearance, with no visible plumbing connections or floor-mounted components.

Learning more about what wall-hung toilets are.

Common Problems of Wall-hung Toilets

Although wall-hung toilets are very stylish, they can experience various problems throughout use. Some common issues with wall-hung toilets are:

The bathroom becoming loose from the wall

Over time, the toilet bowl may become loose from the carrier system due to regular usage or inadequate installation. An open toilet bowl can result in wobbling, discomfort, and potential water leaks around the base.


You can fix this problem by inspecting the mounting brackets and bolts that secure the toilet bowl to the carrier system. Tighten any loose bolts or brackets to ensure a secure connection. If the problem persists, consult a professional plumber to evaluate the installation and make necessary adjustments.

Water running after flushing

If you notice water running continuously after flushing a wall-hung toilet, it indicates a common problem known as a running toilet. Here are some potential reasons for this issue and their corresponding solutions.

  • Damaged Flapper

The flapper is a rubber or plastic valve that seals the flush valve opening at the bottom of the tank. If the flapper is damaged, worn out, or misaligned, it may not form a proper seal, causing water to leak into the bowl continuously.


To solve the water running after flushing due to a damaged flapper: Inspect the flapper for any signs of damage or misalignment. Clean it and ensure it is properly aligned. If it is worn out or not sealing correctly, replace the flapper with a compatible one from a hardware store or contact the toilet manufacturer for a replacement part.

  • Flapper Chain Issues

The flapper is connected to the flush handle by a chain or lift wire. If the chain is too loose or tight, it can prevent the flapper from closing completely, resulting in water running continuously.


You can adjust the chain length to ensure it has enough slack to allow the flapper to close fully but not too much so that it becomes tangled or caught. Make sure to aim for a slight tension in the chain so that it lifts the flapper when the flush handle is released.

  • Float or Fill Valve Problems

The float and fill valve control the water level in the tank. The tank will overfill if the float is too high, leading to constant water running. Alternatively, if the fill valve is faulty, it may not shut off properly, causing continuous water flow.


Adjust the float to the recommended water level indicated on the fill valve or per the manufacturer’s instructions. Ensure the float arm moves freely without any obstructions. If the fill valve is faulty, consider replacing it with a new one that matches your toilet model.

  • Mineral Deposits or Debris

Sometimes accumulation of mineral deposits or debris on the flapper or flush valve can interfere with proper sealing, leading to water running after flushing.


Clean the flapper and flush the valve thoroughly to remove mineral deposits, sediments, or debris. You can use a soft brush or cloth and a mild cleaning solution to scrub away any buildup gently. Ensure all parts are rinsed and free from residue before reassembling.

  • Water Pressure Issues

Water pressure is another issue that can cause the water to run continuously even after flushing. Extremely high-water pressure can prevent the fill valve from shutting off completely, causing continuous water flow.


Measure the water pressure using a pressure gauge. If it exceeds the recommended level (typically around 50-80 psi), consider installing a pressure regulator on the main water supply line to regulate the pressure. Contact a professional plumber if you need assistance with pressure regulation.

Water is leaking into the wall.

If you notice water leaking into the wall from a wall-hung toilet, it is crucial to address the issue promptly to prevent further damage. Water leakage into the wall can lead to significant damage, including mold growth and structural problems. It can be due to some of the following reasons.

  • Loose Connections

Loose or improperly sealed connections can cause water to leak.


Ensure that all connections are tight and secure. Tighten any loose connections, and if necessary, use the plumber’s tape or thread sealant to ensure a watertight seal. If the problem persists, consult a professional plumber to assess and repair the connections.

  • Cracked Tank or Bowl

Inspect the tank and bowl for any visible cracks or damage. Cracks in the porcelain can lead to water leakage.


If you find cracks, replacing the tank or bowl entirely is recommended. Contact the manufacturer or a professional plumber to obtain the correct replacement parts and ensure proper installation.

  • Damaged Seals or Gaskets

Check the seals and gaskets around the tank and bowl. Over time, these components can wear out, causing water to leak.


Replace any damaged or worn-out seals or gaskets. Ensure that the new seals or gaskets are the correct size and properly installed to create a watertight seal.

  • Faulty Wax Ring

The wax ring is located between the base of the toilet bowl and the floor, providing a waterproof seal. If the wax ring is deteriorated or improperly installed, it can cause water to leak into the wall.


Remove the toilet bowl and inspect the wax ring. Replace it with a new wax ring if it is damaged or not creating a proper seal. Follow the manufacturer’s instructions for correct installation to ensure a tight seal.

  • Structural Issues

In some cases, water leaking into the wall may result from structural issues, such as damaged or deteriorated pipes within the division.


If you suspect structural issues, contacting a professional plumber to assess and repair the plumbing system is best. They can identify any damaged pipes, improve them, and ensure proper sealing to prevent future leaks.

Flushing Problems

Flushing problems with a wall-hung toilet can be frustrating but often solvable.

  • Weak Flush

If your wall-hung toilet is not flushing with enough force, it may not effectively clear waste from the bowl.


Check the water supply valve behind the toilet to ensure it is fully open. Check the main water supply for any issues if the water pressure seems low. Additionally, mineral deposits or debris might obstruct the rim or siphon jets. Clean these areas with a brush or a mixture of vinegar and water to improve water flow.

  • Partial Flush

When you flush the toilet, and only a portion of the water is released, leaving waste behind, it indicates a partial flush.


First, check the water level in the tank. It should reach the marked fill line. If the water level is too low, adjust the float arm or the fill valve to increase the water level. If that doesn’t resolve the issue, there might be an obstruction in the flush valve or the tramway. Use a toilet auger or a plunger to clear any clogs.

  • Double Flushing

Double flushing occurs when you flush the toilet multiple times to clear the waste completely.


Inspect the flapper or flush valve seal. It may not create a proper seal if worn or damaged, causing water to leak into the bowl and requiring a second flush. Replace the flapper or flush valve seal if necessary. Also, ensure the flush lever or button releases when pressed to allow a full color.

  • Phantom Flushing

Phantom flushing refers to the toilet spontaneously refilling and flushing without anyone pressing the flush lever or button.


In most cases, phantom flushing is caused by a faulty flapper or flush valve seal. If the flapper doesn’t sit properly, water can leak into the bowl, triggering the fill valve to refill the tank. Replace the flapper or flush valve seal to ensure a tight seal and prevent unnecessary flushing.

  • Noisy Flushing

Excessive noise during flushing can be bothersome and may indicate a problem.


The noise might be due to a loose or worn-out fill valve or float ball. Tighten any flexible components or replace them if necessary. Also, check for a water hammer, a loud banging noise caused by water pressure surges. Installing a water hammer arrestor or adjusting the water pressure regulator can help resolve this issue.

Tank Condensation

Condensation can form on the concealed tank, especially in humid environments, due to temperature differences between the tank and the surrounding air. Condensation can lead to moisture buildup, potential water damage to the wall, and mold or mildew growth.


Consider using a tank liner or insulating material to minimize temperature differences and prevent condensation. Improve ventilation in the bathroom to reduce humidity levels. Regularly wipe down any condensation on the tank to prevent moisture accumulation.

Difficulty in Maintenance

Wall-hung toilets can be more challenging to access for maintenance than standard toilets.


During the initial installation, ensure sufficient access space for maintenance. If maintenance or repairs are required, consult a professional plumber with experience in wall-hung toilet systems to ensure proper handling.


Due to improper cleaning or faulty traps, odors can emanate from the toilet bowl or drain pipe. Problems: Persistent odors can make the bathroom unpleasant and indicate potential hygiene issues.


Use appropriate cleaning agents to clean the toilet bowl, including under the rim, regularly. Ensure that the trap in the drain pipe is properly sealed and functioning to prevent sewage gases from escaping. If the problem persists, consult a professional plumber to evaluate the drainage system and make any necessary repairs.


While wall-hung toilets offer space-saving benefits and a sleek appearance, they can experience common problems that require attention. By understanding these issues and their potential causes, you can tackle them effectively and keep your wall-hung toilet in excellent condition.

Georgebathroom has many experiences with toilets; if you have any problems, contact us for the best solutions.

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