A Comprehensive Troubleshooting Guide to Resolve Issues with S-Trap Toilet Bowls

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S-Trap toilet bowls are a common fixture in many households, known for their efficiency and reliability. However, like any other plumbing system, they can experience issues that may disrupt their normal functioning. In this comprehensive troubleshooting guide, we will explore some common problems that may arise with S-Trap toilet bowls and provide step-by-step solutions to resolve them. Whether you are dealing with a constantly running tank, a weak flushing system, or a leaking bottom, this guide will help you troubleshoot and fix these toilet bowl issues effectively.


Water Runs but Tank Won’t Fill Properly


One common problem with S-Trap toilet bowls is when the water continues to run, but the tank won’t fill properly. This can be caused by a variety of factors, including a faulty fill valve or a clogged water supply line. To troubleshoot this issue, follow these steps:

  • Check the fill valve: Start by inspecting the fill valve. Ensure that it is properly connected and not damaged. If you notice any cracks or leaks, it is advisable to consult professional toilet bowl leak services as it may be necessary to replace the fill valve.
  • Clean the fill valve: Sediment and debris can accumulate in the fill valve, preventing it from functioning properly. To clean the fill valve, turn off the water supply and remove the valve cap. Rinse the valve thoroughly and remove any debris. Reassemble the valve and turn on the water supply to check if the issue is resolved.
  • Check the water supply line: If cleaning the fill valve doesn’t solve the problem, the issue may lie with the water supply line. Turn off the water supply, disconnect the line, and inspect it for any clogs or kinks. If necessary, replace the water supply line and test the toilet bowl again. However, if you’re uncertain about your skills, it’s always a good idea to rely on professional toilet bowl choke services.


Constant Water Running


Another common toilet bowl problem that can be avoided by homeowners is toilets constantly running water. This can not only be annoying but can also lead to significant water wastage. If you are experiencing this issue with your S-Trap toilet bowl, here are some troubleshooting steps to follow:

  • Check the flapper valve: One way to prevent your toilet bowl from leaking is to replace your flapper valve. This valve is pivotal in sealing the flush valve and thwarting the continuous flow of water into the toilet bowl. To ensure effectiveness, regularly inspect the flapper valve for any signs of cracks or damage. If wear and improper sealing are evident, a replacement is necessary. 
  • Adjust the chain or rod: Sometimes, the chain or rod connecting the flush handle to the flapper valve can become loose or misaligned. Ensure that the chain or rod is properly connected and has the correct amount of slack. Adjust it if necessary, so that the flapper valve can close completely after each flush.
  • Clean the flush valve seat: There are different types of toilet bowl leaks, including one caused by a leaking toilet bowl flush valve. Sediment and mineral deposits can build up on the flush valve seat, preventing a proper seal. Turn off the water supply and flush the toilet to drain the tank. Use a soft brush and a non-abrasive cleaner to scrub the flush valve seat and remove any deposits. Rinse thoroughly and turn on the water supply to check if the issue is resolved.


Water Level Too Low or Too High

S-Trap toilet bowls like the Magnum 935 Turbo Tornado 1-Piece Toilet Bowl and Magnum 918S Turbo Tornado 1-Piece Toilet Bowl require an optimal water level for proper performance. If the water level is either too low or too high, it can impact its overall functionality. Here are some troubleshooting steps to assist you in adjusting the water level:

  • Adjust the float: The float is responsible for controlling the water level in the tank. If the water level is too low, adjust the float to a higher position. If it is too high, adjust the float to a lower position. Most floats can be adjusted by either bending the float arm or using a screwdriver to modify the float mechanism.
  • Check the fill valve height: The fill valve is connected to the float and controls the water flow into the tank. Ensure that the fill valve is properly adjusted to the correct height. If it is too low, the water level will be insufficient. If it is too high, the water level will be excessive. Adjust the fill valve height as necessary and test the toilet bowl to ensure the water level is optimal.
  • Inspect the overflow tube: The overflow tube prevents the tank from overflowing. If the water level is consistently too high, the overflow tube may be blocked or damaged. Check the overflow tube for any obstructions and clear them if necessary. Replace the overflow tube if it is cracked or broken.

Weak Flushing


A weak flush is a common toilet flush problem that can be frustrating and may require multiple flushes to clear the bowl effectively. If you are experiencing weak flushing with your S-Trap toilet bowl, follow these troubleshooting steps:

  • Check the water level: Ensure that the water level in the tank is adequate for a proper flush. Adjust the float and fill valve height, as mentioned earlier, to achieve the correct water level. If the water level is too low, it can result in a weak flush. 
  • Clean the rim jets: Mineral deposits and debris can accumulate in the rim jets, affecting the water flow during a flush. Turn off the water supply and use a thin wire or a small brush to clean the rim jets. Remove any obstructions and rinse thoroughly. Turn on the water supply and test the flushing system to see if it has improved.
  • Inspect the flush holes: Small flush holes are situated around the rim of the toilet bowl. Over time, these holes can get clogged with mineral deposits or debris, resulting in weak flushing. To tackle this, employ a wire or a small brush to clean the flush holes and guarantee unobstructed water flow. Alternatively, it’s recommended to enlist professional toilet bowl flush system services to prevent potential damage stemming from a lack of expertise.


Tank Leaking at the Bottom


If you notice water pooling around the base of your S-Trap toilet bowl, it indicates a leak at the bottom of the tank. This sign of toilet bowl leaking should be addressed promptly to prevent further damage. Here’s how you can troubleshoot and resolve a tank leak:

  • Inspect the tank bolts: The tank bolts secure the tank to the bowl. Check if they are loose or damaged. Tighten any loose bolts or replace them if necessary. Ensure that the tank is securely attached to the bowl to prevent leaks.
  • Check the tank gasket: The tank gasket creates a watertight seal between the tank and the bowl. Inspect the gasket for any signs of wear or damage. If it is cracked or deteriorated, it will need to be replaced. Drain the tank, remove the old gasket, and install a new one according to the manufacturer’s instructions.
  • Examine the tank-to-bowl connection: Inspect the connection between the tank and the bowl for any cracks or gaps. If you notice any issues, it may be necessary to replace the tank or bowl. Consult a professional plumber if you are unsure about the severity of the damage or if the toilet bowl leak persists after attempting these troubleshooting steps.


Detachable Parts are Broken or Malfunctioning


S-Trap toilet bowls such as Baron W-203A 2-Piece Toilet Bowl and Baron W-368A 1-Piece Toilet Bowl consist of various detachable parts that can break or malfunction over time. These parts include the flush handle, flush valve, fill valve, and flapper valve. If any of these components are broken or not functioning properly, follow these troubleshooting steps:

  • Identify the broken or malfunctioning part: Inspect each detachable part to determine which one is causing the issue. Look for cracks, leaks, or signs of wear. Once you have identified the faulty part, proceed with the appropriate troubleshooting steps.
  • Replace the broken part: Purchase a replacement part that is compatible with your S-Trap toilet bowl. Follow the manufacturer’s instructions to remove the broken part and install the new one. Ensure that all connections are secure and properly aligned.
  • Test the toilet bowl: After replacing the broken or malfunctioning part, test the toilet bowl to ensure that it is functioning correctly. Flush the toilet multiple times and check for any leaks or abnormalities. If the issue persists, it may be necessary to consult a professional toilet bowl installation and replacement services for further assistance.

Contact Toilet Bowl City Singapore for Professional Toilet Bowl Installation Services

If you have tried all the troubleshooting steps mentioned in this guide and are still experiencing issues with your S-Trap toilet bowl, it is recommended to seek professional assistance. Contact Toilet Bowl City Singapore to experience professional toilet bowl installation services, ensuring that your toilet bowl is installed correctly and functions optimally. Our team of experienced plumbers can diagnose and resolve any complex issues you may be facing with your S-Trap toilet bowl.



S-Trap toilet bowls are reliable and efficient fixtures that can enhance the functionality of any bathroom. However, like any plumbing system, they can encounter problems that may disrupt their normal operation. By following this comprehensive troubleshooting guide, you can diagnose and resolve common issues with S-Trap toilet bowls, such as water running but the tank not filling properly, constant water running, water level being too low or too high, weak flushing, and tank leaks at the bottom. If you are unable to resolve these issues on your own, it is advisable to seek professional assistance from Toilet Bowl City Singapore. Remember, a well-maintained and properly functioning S-Trap toilet bowl is essential for a clean and comfortable bathroom experience. Visit our website to know more about Toilet Bowl City Singapore and the comprehensive services we provide.


At Toilet Bowl City Singapore, we understand the need to keep home service expenses within your budget. Hence, we offer honest and reasonable pricing for any of your toilet bowl installations works. Select from our range of toilet bowl brands, browse our past toilet bowl installation projects for inspiration, or read up on toilet bowl-related articles to find out more about toilet bowl installation services. Get in touch with us now via WhatsApp at +65 8241 0032!