7 Common Plumbing Problems in Singapore Homes

Key Takeaways

• Hair, grease, food waste and unsuitable flushed items can clog drains and toilets
• Small, unnoticed leaks can waste significant amounts of water.
• Damp ceilings, mould and peeling paint may indicate plumbing or waterproofing problems.
• Blocked fixtures, pipe issues and faulty booster pumps are possible causes.
• Early diagnosis can prevent unnecessary expenses and additional property damage.

Imagine coming home from work to wash your tupperware and water bottles, only to realize your kitchen sink is all clogged up when you are just about to finish rinsing. Annoying right?

Whether you live in an HDB flat, condominium or landed property, we’re near certain you face at least ONE common plumbing problem including blocked drains, leaking taps, running toilets, water leaks, low water pressure and damaged pipes.

Some issues are straightforward to resolve, while others require professional inspection. 

But if you don’t know what the common plumbing problems are, then don’t worry! We list 7 of them for you.

1. Clogged Kitchen Sinks and Bathroom Drains

Clogged drains are a familiar household frustration, especially when kitchen sinks take longer to empty or bathroom floor traps overflow. 

Common causes include:

• Cooking grease and food accumulating inside kitchen pipes.
• Hair and soap residue collecting around bathroom floor traps.
• Dirt and foreign objects obstructing drainage outlets.
• Construction debris entering pipes during renovation works.

HDB advises residents to use kitchen sink strainers and avoid disposing of food waste into sinks, as accumulated waste can cause drainage blockages.

What You Should Do if you have a clogged sink

Start by removing visible debris from the sink strainer or accessible floor trap.

Avoid repeatedly pouring harsh drain cleaners into blocked pipes, especially when the cause is unknown.

If wastewater keeps backing up or the blockage returns repeatedly, engage a plumber to inspect the drainage system.

2. Clogged Toilets and Poor Flushing

Nobody wants to deal with a clogged toilet, especially when it happens right before leaving for work.

Common causes include excessive toilet paper, wet wipes, foreign objects and obstructions deeper inside the discharge pipe.

Other warning signs include:

• Water rises unusually high after flushing.
• Slow drainage or incomplete flushing.
• Gurgling sounds from the toilet.
• Repeated blockages despite clearing the bowl.

What You Should Do

A toilet plunger may clear a minor obstruction near the bowl.

However, avoid repeated flushing when water is already rising, as this could cause wastewater to overflow, which is very gross.

If the toilet remains blocked or several sanitary fixtures experience similar problems, professional clearing is  necessary.

3. Leaking Taps and Worn-Out Fixtures

That occasional drip, drip, drip may not seem urgent, but leaving a faulty tap unrepaired wastes water over time.

According to PUB’s leak detection guidance, a leaking tap can waste up to two litres of water per hour.

At that rate, water wastage could reach:

• 48 litres per day
• 1,440 litres over 30 days

Again, these are illustrative calculations based on PUB’s leakage figure, not the average wastage from every dripping tap.

Common causes include worn internal seals, damaged cartridges, loose connections and ageing fixtures.

Repair or Replace?

If the problem involves a replaceable cartridge or seal, repairing it may be sufficient.

However, older taps with corrosion, recurring leaks or damaged components may be better replaced.

4. Constantly Running Toilet Cisterns

Sometimes the toilet looks perfectly fine, but water continues trickling into the bowl long after flushing.

This often points to problems with the flushing mechanism, inlet valve or internal seals.

According to PUB, a silently leaking flushing cistern can waste more than 10 litres of water per hour.

That means water wastage could exceed 240 litres daily, even without a visible puddle.

How to Check for a Leaks

For an accessible cistern, PUB recommends using a leak detection tablet or a little food colouring in the tank.

Wait without flushing and observe whether coloured water appears in the toilet bowl.

If it does, water may be escaping through the flushing mechanism.

5. Concealed Water Leaks and Damp Ceilings

Not every water leak produces an obvious puddle.

In older HDB flats, water can seep through damaged waterproofing, deteriorating pipe joints or concealed plumbing.

Warning signs include:

• Damp patches appearing on walls or ceilings.
• Peeling paint, bubbling surfaces or persistent mould.
• Musty smells around bathroom or kitchen fixtures.
• Unexpected increases in household water consumption.
• Water stains that continue spreading.

In this scenario, we recommend straight up hire a professional plumber for this. For more information on how much a plumber costs in Singapore, check out our guide!

Responsibility for Ceiling Leaks in HDB Flats

For leaks involving the floor or ceiling slab between flats, HDB generally requires the affected owners to coordinate repairs and share the costs.

However, when a leak originates from common property, such as the roof above a top-floor unit, the Town Council is responsible for rectification.

6. Low Water Pressure in HDB Flats

Weak shower pressure can make everyday routines unnecessarily frustrating.

However, low water pressure does not always mean your entire plumbing system needs replacing.

Possible causes include:

• Blocked tap aerators or showerheads.
• Partially closed water valves.
• Deteriorating or obstructed pipework.
• Malfunctioning water booster pumps.
• Temporary water supply disruptions.

Start by checking whether the problem affects one tap or multiple fixtures.

• If only one outlet has weak flow, the problem may involve its aerator or fitting.
• If several taps experience reduced pressure, the issue could involve the wider water supply system.

For HDB flats, contact your Town Council if a building booster pump is suspected. Condominium residents can approach their management office or MCST.

7. Burst Pipes and Emergency Water Leaks

A burst pipe requires immediate attention because escaping water can quickly damage flooring, cabinetry, electrical installations and neighbouring units.

Pipe failures may result from corrosion, deteriorating joints, accidental damage or ageing materials.

Immediate Steps to Take

1. Shut off the water supply: Locate the relevant stopcock or isolation valve.
2. Avoid electrical hazards: Keep away from affected electrical outlets and appliances.
3. Contain the water: Use towels or containers where safe.
4. Document the damage: Take photographs for repair records or insurance claims.
5. Contact a plumber: Arrange an assessment and necessary repairs.

HDB advises residents to shut the stopcock at the PUB water sub-meter when dealing with leaking water pipes.

Avoid attempting temporary repairs on severely damaged pressurised pipework without the necessary expertise.

DIY Plumbing Repairs vs Professional Assistance

Some minor maintenance tasks are manageable without professional assistance.

Choosing a Reliable Plumber in Singapore

Most plumbing problems begin with small warning signs, such as slow drainage, a dripping tap or unusual moisture around bathroom fixtures.

Addressing these symptoms early can reduce water wastage, prevent property damage and avoid complicated repairs.

If the issue involves recurring blockages, concealed leaks or damaged pipes, professional diagnosis is usually the safer option.

Listing Singapore helps Singapore homeowners compare plumbing service providers based on their repair needs. Browse the Top 10 Plumbing Services in Singapore and contact suitable providers for quotations before arranging repairs.

Frequently Asked Questions About Common Plumbing Problems in Singapore

What Is the Most Common Plumbing Problem in Singapore?

Blocked drains, leaking taps, toilet malfunctions and pipe leaks are frequently encountered household problems. However, there is no verified nationwide ranking establishing which occurs most often.

How Much Does It Cost to Fix a Plumbing Problem in Singapore?

Straightforward household plumbing jobs may cost approximately S$80 to S$350, depending on the fault and scope of work. Concealed leaks, extensive pipe repairs and emergency services can cost more.

Who Pays for Water Leakage Between HDB Flats?

When a ceiling leak involves the shared floor or ceiling slab between two flats, the affected owners generally coordinate repairs and share the costs. Different arrangements apply to leaks originating from common property.

Do All Plumbing Repairs Require a PUB-Licensed Plumber?

No. PUB allows certain simple plumbing works, including replacing taps and clearing blockages, to be carried out without a plumbing licence.

Can I Use Chemical Drain Cleaners for a Blocked Sink?

Chemical cleaners may damage certain plumbing materials or create handling hazards if used incorrectly. Removing accessible debris and arranging professional clearing for persistent blockages are generally safer approaches.

When Should I Call an Emergency Plumber?

Seek urgent assistance for burst pipes, uncontrolled water leaks, overflowing wastewater or plumbing failures threatening electrical safety or causing significant property damage.