Toilet Flush System Installation, Replacement & Repair

Toilet Flush System Installation, Replacement & Repair in Singapore

Everyone in the city of Singapore knows that a well-functioning toilet flush system is essential to maintain hygiene and efficiency in any bathroom. Even toilets account for almost 30% of an average home’s indoor water use.

When someone upgrades to a high-efficiency toilet, they can save up to 13,000 gallons of water annually. This is why toilet flush system installation, replacement, and repair service in Singapore is important. 

According to statistics, around 3 gallons of water is wasted per flush of the toilet every day. If your toilet has issues like leaks or weak flushing, then this waste may rise significantly. Not only water waste, but a lot of worse things also happen due to toilet bowl or flush system problems. 

Won’t you think of getting assistance from professionals like Li Fong Handyman? We cure your burden of using a nasty, non-functional toilet tank or flush system. Our years of experience, knowledge, and methods of service can easily provide you with fresh, running, and long-lasting restrooms. 

Types of Toilet Flush Systems

A flush tank or flush system varies in design and functionality. These varieties offer different levels of water efficiency and performance. In Singapore, you may find these types of toilet flush systems:

Single Flush System

A single-flush system uses the same amount of water for every flush. It may be typically around 6 liters per flush. You can find this standard system in many older toilets.

Dual Flush System

Another interesting flush system – dual flush offers two options: a full flush for solid waste (usually around 6 liters) and a half flush for liquid waste (around 3 liters). This design helps conserve water and reduce utility bills.

Pressure-Assisted Flush System

This third type of flush tank uses pressurized air to force water into the bowl. As a result, the user gets a powerful flush from the tank. This system is more efficient at clearing waste. But it has two issues – noise and more expensive to maintain. 

Gravity Flush System

Can you recall Newton’s gravity? Well, the gravity flush system relies on the natural force of gravity to move water from the tank to the bowl. This is the most common type of flush system. It is known for its simplicity and reliability.

Double Cyclone Flush System

It features two nozzles that create a powerful cyclone of water to clean the bowl. This system is efficient as it uses less water per flush than traditional systems.

Tankless Flush System

You can notice these tankless flush systems often in commercial settings. They use a direct water supply to flush the toilet. Additionally, these systems can save space and water. However, they require a strong and consistent water pressure.

Toilet Flushing System Parts

Toilet Flushing System Parts

Multiple essential components work together to ensure proper flushing and water management in a toilet flush system. 

Flush Valve

The flush valve controls the release of water from the tank into the bowl. When you press the flush handle, the flush valve opens. It allows water to flow into the bowl to flush away waste.

Fill Valve

The fill valve (or the ballcock) refills the tank with water after each flush. It is connected to the water supply line. Also, it regulates the water level in the tank.


The flapper is a rubber or plastic seal that sits on the flush valve opening. When you flush, the flapper lifts. It allows water to flow into the bowl. Then, it reseals the opening to let the tank refill.

Flush Handle

The flush handle, or lever, is connected to the flush valve via a chain or rod. When you press the handle, it lifts the flapper and initiates the flushing process.

Overflow Tube

The overflow tube prevents the tank from overflowing by directing excess water into the bowl.  Plus, it helps to maintain the correct water level in the tank.


The float is a buoyant device attached to the fill valve. It rises and falls with the water level in the tank. This way, it signals the fill valve to stop or start refilling the tank.

Chain or Rod

The chain connects the flush handle to the flapper. When you press the handle, it pulls the chain or rod to lift the flapper and allow the flush to occur.


The tank holds the water used for flushing. It houses all the internal components of the flushing system. The tank ensures a sufficient supply of water for each flush.


The bowl is the part of the toilet that holds the waste. It is connected to the tank. Also, it is flushed clean when you release water from the tank.

Wax Ring

The wax ring is a seal between the toilet base and the floor drain. It prevents leaks and ensures a secure connection.

Toilet Flushing System Replacement Cost

Replacing a toilet flushing system involves several components which we have already discussed. Hence, the replacement cost varies depending on the type and quality of the parts. You need to count labor costs with the price of parts. 

ItemCost Range (SGD)
Flush Valve$15 – $50
Fill Valve$20 – $60
Flapper$5 – $20
Handle$10 – $30
Labor$50 – $150
Total$100 – $310

You need to spend around $100-$310 USD to replace a toilet flushing system (including labor costs). However, high-end parts or complex installations may increase the overall cost.

Li Fong Handyman provides expert plumbing services, including toilet flushing system replacements. Our skilled plumbers offer efficient and reliable service. But all these at affordable rates! 

Toilet Flushing System Replacement Kit

You should have the right kit (like we do) to make the replacement job smoother and more efficient. In a kit, there must be:

Tank-to-Bowl Bolts

You can secure the toilet tank to the bowl with these bolts. The kit should contain bolts with washers on both ends to ensure a tight seal and prevent leaks.

Washers and Wing Nuts

Besides the bolts, these nuts are also helpful in securing the tank. The washers provide cushioning and sealing. Alternatively, the wing nuts allow for easy tightening by hand.

Flex Line

You may find it by another name – the water supply line. It connects the toilet tank to the water supply valve. It’s crucial to fill the tank after each flush.

Flapper Chain

This chain links the flapper to the toilet handle. It allows the flapper to open and close during flushing. You must have the correct length and tension of the chain for proper flushing operation.

Flush Valve and Flapper

The flush valve is the opening at the bottom of the tank through which water enters the bowl during flushing. The flapper seals this opening between flushes. 

Adjustable Height Flush Siphon

Some kits may offer adjustable height flush siphons. They can accommodate different water levels in the tank for optimal flushing performance.

Instructions and Tools

Yes, these non-physical components are also considerable as required tools. If you are doing the job alone, these instructions will be valuable. 

How to Change Toilet Flush System Singapore?

You are a proud Singaporean, aren’t you? Li Fong Handyman loves to keep you happy. In this part, you will learn how to change a toilet flush system following some simple steps:

Turn Off the Water Supply

Locate the shut-off valve behind the toilet. Then, turn it clockwise to stop the water flow.

Empty the Tank

Flush the toilet to drain the water from the tank.

Remove Old Parts

Unscrew the nuts and bolts holding the old flush system in place. Then, remove the flush valve, fill valve, flapper, and handle.

Install New Parts

Now, follow the instructions provided with your new flush system to install the new flush valve, fill valve, flapper, and handle.

Reconnect the Water Supply

Next, turn the shut-off valve counterclockwise to restore water flow.

Test the System

Flush the toilet a few times to ensure everything is working properly.

Contact us if you prefer professional assistance from skilled plumbers to change your toilet flush system efficiently. We ensure that you get a hassle-free experience and proper installation. 

How to Repair Toilet Flush System Singapore?

Like changing, you can repair the system with some basic tools and replacement parts. Let’s follow a simple guide:

Identify the Problem

First and foremost, determine if the issue is with the flush valve, fill valve, flapper, or handle.

Turn Off the Water Supply

Now, shut off the water supply to the toilet by turning the valve clockwise.

Empty the Tank

Next, flush the toilet to drain the water.

Replace Faulty Parts

Replace the flapper with a new one if it is leaking. If the fill valve is not working, install a new fill valve. Next, tighten or replace the handle if it’s loose or broken.

Reassemble and Test

Lastly, reassemble the components and turn the water supply back on. Flush the toilet to test the repair.

For complex repairs or if you’re unsure about the process, we offer expert toilet flush system repairs. Our men can quickly diagnose and fix any issues. In return, you get a working toilet flush tank.


How often should a toilet flush system be replaced?

Usually, a system lasts for 10-15 years. You can increase its lifespan with regular maintenance. However, if you notice any persistent issues (like leaks or weak flushing), you may consider replacing it. 

What are the signs that a toilet flush system needs repair or replacement?

Common signs include:

  • Continuous running water
  • Weak or incomplete flushes
  • Unusual noises
  • Leaks around the base of the toilet or from the tank
  • Difficulty in flushing

How can I reduce water usage in my toilet?

We suggest you install a low-flow or dual-flush toilet. It is one of the best ways to reduce water usage. Additionally, regular maintenance to fix leaks and optimize the flush mechanism can save a significant amount of water​.

Final Words 

An active toilet flush system means efficient water use and overall bathroom hygiene. The parts we have mentioned like the valve, flapper, flush handle, chain, etc. may often go defective. But a professional repair, replacement, or installation can solve them and make the system active again.

For professional and reliable plumbing services, consider Li Fong Handyman. We offer expert solutions to keep your toilet operating smoothly. Our services include everything from installation to routine maintenance.

Li Fong’s skilled plumbers are ready to respond to your call. You may call us at +65 8060 2976 or email us at [email protected].

Thank you for your convenience.

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