A visitor at a public toilet in Punggol may place their hands below an automatic basin tap and find that no water comes out. Another tap may run continuously after the hands have moved away, spray sideways from a loose aerator or activate repeatedly without anyone using it. Do not hit the sensor, cover the lens with tissue, open the tap housing or twist an unfamiliar isolation valve. Use another working basin if one is available and tell the toilet cleaner, building management or facilities team about the exact tap.

The National Environment Agency (NEA) advises public toilet owners to keep all toilet facilities in good working order, rectify leaks and defects promptly and maintain sanitary fittings regularly. PUB also states that faulty taps and water fittings can be reported to the building management or its 24-hour call centre. These responsibilities help distinguish a basin sensor fault from a toilet flush-sensor fault or a wider water-supply interruption. A tap that does not respond is not automatically proof that the building has no water; the operator needs to determine whether the problem is local to one fitting, the sensor, the water supply or the installation.

• Try the normal user position once; do not repeatedly wave objects or strike the sensor.
• If no water comes out, use another basin rather than touching the electronics or opening the tap housing.
• If water runs continuously, report the wastage and any wet-floor risk promptly.
• Avoid using a basin that sprays contaminated water, has a loose fitting or creates a pool on the floor.
• Record the building, floor, toilet block, basin position and observed symptom.
• Tell the onsite cleaner or facilities desk first, especially in malls, libraries, sports centres and community hubs.
• Use PUB’s official contact route for persistent water-supply or faulty-water-fitting concerns where appropriate.
• Never dismantle, tape, clamp or modify a public tap or sensor.

1. What a sensor tap does

A sensor tap uses a detection system to activate water when a user’s hands are placed within a designed sensing area. Its purpose is to make handwashing convenient and reduce the need to touch a shared handle. The system can include a sensor window, control electronics, a valve, a power source and a water connection.

The public user sees only the spout and sensor face. A failure may originate in one of several parts, so a visitor should describe the behaviour rather than diagnose a failed solenoid, battery or circuit. A trained maintenance worker can identify the correct component and service procedure.

2. A basin tap is not a toilet flush valve

A public toilet may have automatic taps at the wash basin and automatic flush valves at the WC or urinal. These are different sanitary fittings. A tap controls water delivered to the basin; a flush valve releases water into the toilet or urinal.

The separate Punggol auto-flush sensor guide covers WC and urinal problems. This article focuses on basin taps. Reporting the correct fitting helps the facilities team send the appropriate maintenance worker.

3. No water when hands are placed below the sensor

A tap may fail to activate when a user places their hands in the normal position. The cause could be an obstructed sensor window, power issue, control fault, closed supply, blocked filter or another technical problem. The user cannot determine which one applies from the lack of water alone.

Try the normal interaction once and check whether there is an obvious posted instruction. If nothing happens, use another basin and tell staff. Do not place an object over the sensor or keep moving hands rapidly in an attempt to force activation.

4. Water starts only after several attempts

An intermittent sensor response can lead users to wave their hands repeatedly or move closer to the spout. This may temporarily activate the tap, but it does not mean the fitting is working correctly. A user should not have to perform an unusual sequence to obtain water.

Describe how many normal attempts were needed and whether the response was delayed. Do not claim a particular sensor setting is wrong unless a technician has confirmed it. A precise report of intermittent behaviour helps the owner inspect the unit.

5. The tap keeps running after hands are removed

A sensor tap is normally intended to stop water when the user moves out of its detection area, according to the product design. If the flow continues, the tap may waste water and leave the basin overflowing or wetting the floor.

Do not place a hand over the spout or try to block the water with tissue. Report the continuous flow to staff immediately. The operator may need to isolate the fitting or close the basin while a plumber or technician investigates.

6. Repeated unintended activation

A tap may turn on when nobody is washing, or activate repeatedly as people walk past. This can waste water and create splashing. The sensor may be dirty, incorrectly positioned or experiencing a technical problem, but the actual cause needs an inspection.

Tell staff whether the activation happens continuously, at intervals or when someone walks past a nearby area. Do not cover the sensor with a bag or tape, because that may conceal the problem or interfere with the intended safety function.

7. Water sprays sideways

A spout may direct water unevenly because of an obstructed aerator, damaged nozzle or loose fitting. A sideways spray can wet clothing, the floor or nearby electrical fittings. A user should not put their face close to the spout to inspect it.

Stop using that tap and report the direction of the spray. Do not unscrew the aerator or push a sharp object into the outlet. Staff can arrange suitable cleaning or replacement without risking damage to the water fitting.

8. A loose tap or spout

A sensor tap may loosen at the basin mounting or at the spout connection. It can move when water flows or when a user touches it. A loose fitting may also leak below the basin where the user cannot see the source.

Do not twist the spout back into position or tighten an exposed nut. The connection may require a specific seal or fixing. Report the movement and any visible leak, and avoid leaning on the tap.

9. A leak beneath the basin

Water may appear around the base of the tap, beneath the basin or inside a cabinet. A leak can create a slippery floor or damage nearby materials. The visible wet area does not necessarily show where the water is escaping from.

Do not open a locked vanity or plumbing panel. Tell the cleaner or building staff where the water appears and whether it is dripping or flowing. The operator can inspect the pipe joints and fittings using the appropriate tools.

10. A puddle caused by a running tap

A tap that does not stop can leave water on the floor. This increases the risk of slipping, particularly for older visitors, children and people using mobility aids. If the puddle is close to an electrical fitting, keep clear and alert staff immediately.

Do not place loose paper or a personal towel on the floor as a long-term fix. The cleaner may need to use a wet-floor sign and clean the area after the leak is controlled. Report the running water and the exact basin so maintenance and cleaning can coordinate.

11. A sensor window covered by dirt

The sensor face may accumulate soap residue, water spots or other deposits. This can affect its ability to detect hands, depending on the product. The user may see a visibly dirty lens but cannot know whether cleaning alone will resolve the problem.

Do not scrape the window or use a rough pad. Public toilet operators have cleaning and maintenance procedures for fittings. Tell staff if the lens appears covered and whether the tap is not responding under normal use.

12. Soap and water near the sensor

Handwashing areas are frequently exposed to soap, water and splashes. Residue near a sensor can interfere with the user interface or make it difficult to see the detection area. A sensor may also be positioned differently from one tap model to another.

Follow the label on the fitting and use the normal hand position. Do not spray soap directly into a sensor or press any small maintenance button. If the tap remains unresponsive, use another basin and report it.

13. Battery-powered and mains-powered designs

Different sensor taps use different power arrangements. Some may use a battery, while others may be connected to the building’s electrical system. The public cannot determine which design is installed just by looking at the spout.

Do not open a battery compartment or unplug wiring under the basin. A qualified worker must identify the product and use the correct replacement part. Tell staff whether other taps in the same toilet are affected, but do not attempt to reset electrical equipment.

14. The water supply may be interrupted

A tap that produces no water might be affected by a local fitting fault or by a wider interruption to the building’s supply. If several taps and other fixtures in different rooms are also affected, the issue may be broader than one sensor.

Ask staff whether the building has an announced maintenance interruption. Do not open a common valve cabinet. PUB’s official help service provides reporting for water-supply problems and low pressure, while the building operator can inspect its internal fittings and plumbing.

15. One tap versus every basin

If one sensor tap fails while nearby basins work normally, the fault may be local to that fitting. If all taps on a floor are dry, there may be a broader supply or building maintenance issue. These are useful observations, not proof of the underlying cause.

Tell staff whether other basins work and whether nearby toilets or pantry taps have water, if you can observe that without entering staff areas. The facilities team can establish whether the problem is local or building-wide.

16. Low water pressure at the tap

A tap may produce a weak stream rather than no water at all. Low flow can arise from a local blockage, an internal valve or a wider supply issue. A sensor may still detect the user’s hands and activate while the flow remains weak.

Describe the flow as weak, intermittent or reduced compared with other basins. Do not remove the aerator or adjust a flow-control screw. PUB’s help and feedback service has a route for reporting low water pressure where the issue may involve the water supply.

17. Water quality and unusual appearance

If the tap produces discoloured or unusual-looking water, do not assume that the sensor is the cause. The issue could relate to the local fitting, internal pipework or wider water supply. PUB advises customers to identify whether discolouration is localised to one appliance or affects several outlets.

Do not drink water from a public wash basin. If the appearance is unusual, stop using it for handwashing and tell the facility manager. For a wider water-supply concern, follow PUB’s official water-quality guidance and contact route.

18. NEA’s maintenance expectations

NEA’s Advisory to Owners of Public Toilets says owners should ensure toilet facilities are in good working order, keep floors dry and rectify leaks or defects promptly. It also recommends regular inspection and maintenance of sanitary fittings and other amenities.

This means an unresponsive or leaking public tap is a suitable maintenance report. The visitor should not be asked to diagnose the plumbing. The operator is responsible for arranging cleaning, inspection and repairs under its own maintenance process.

19. PUB’s role in faulty taps and water fittings

PUB’s published Water Fittings guidance explains that taps and mixers are regulated water fittings and must meet the applicable standards for use in potable water installations. PUB’s consumer guidance has also directed members of the public to report faulty taps and water fittings to building management or its 24-hour call centre.

For a tap fault in a mall or public toilet, the first practical contact is usually onsite management because it controls the fixture. PUB’s current Contact Us page provides the official 24-hour call centre details. Use it when the issue concerns a broader supply or water-fitting matter, rather than assuming PUB will dispatch a plumber for every isolated basin sensor.

20. A shopping mall toilet

A shopping centre may have several washrooms on different levels and a central facilities team. A faulty tap in one cubicle cluster should be reported with the floor and restroom location so the team can direct its cleaner or technician to the correct unit.

The retailer beside the toilet may not manage the basin plumbing. Use the mall’s information counter, cleaning staff or official facilities channel. If water is running onto the floor, notify staff promptly rather than relying on a later review.

21. A hawker centre or coffeeshop toilet

Toilets in food premises are public-facing facilities and their operators have responsibilities for cleanliness and working amenities. A basin tap that does not activate can make handwashing difficult after a meal. A leak can also create a wet-floor and hygiene problem.

Tell the premises operator or cleaner which basin is affected. NEA’s public toilet guidance explains maintenance expectations. Avoid assuming the nearest Town Council owns a toilet inside a privately managed coffeeshop or food centre.

22. A community hub, library or sports centre

A community hub may have several tenants and shared facilities. The toilet operator could be the building manager rather than the library, sports centre or community programme using the space. Identify the actual building and floor when reporting.

For Punggol Regional Library or a sports facility, onsite staff can usually direct you to the proper facilities team. A public tap issue should not be sent to the operator of an unrelated service just because it is located in the same building.

23. HDB estate facilities and private premises

Some toilets are part of a public community facility, while others are inside private commercial or residential premises. The responsible owner or manager depends on the actual property. A toilet near an HDB block is not automatically a Town Council asset.

Use the premises sign, customer-service counter or OneService routing where the issue is genuinely a municipal common facility. For a private mall or condominium, contact the managing agent or facilities operator.

24. Why soap availability is a separate problem

A tap may work normally while the soap dispenser is empty or blocked. That is a separate hygiene-amenity issue. Conversely, a working soap dispenser does not make an unresponsive tap acceptable.

Our Punggol public toilet soap and hand-dryer guide covers those amenities. Report the soap issue and the tap issue separately if both occur, so staff can assign the right maintenance or replenishment task.

25. Why the hand dryer is not part of the tap fault

A hand dryer may be broken while the tap is functioning, or the tap may be dry while the dryer still works. These are separate fittings, often with different power and service arrangements. An electrical fault at the dryer also should not be used to infer a tap fault.

Describe each component accurately. Do not attempt to reset the dryer or use its electrical socket to power an improvised tap device. The operator can assess both faults through the correct maintenance process.

26. How to report the correct basin

A public restroom may contain a row of similar taps. The report should identify the basin closest to the entrance, the leftmost basin when facing the mirrors, or a fixture number if one is displayed. The floor and toilet block are also helpful.

Do not photograph other people washing their hands. A wide image of the restroom entrance or floor sign can help identify the location, while a short written description identifies the tap. Respect privacy in washrooms.

27. What a safe photograph should show

A photo may show the tap, sensor face, spout and any visible leak, if the basin is unoccupied and the image can be taken without touching the fixture. It can help staff distinguish a no-response issue from a continuous flow or damaged nozzle.

Do not film another user, a child or someone in a private moment. Avoid taking a close-up while water is spraying onto electrical fittings. If a photo would be intrusive or unsafe, provide a written description instead.

28. Why not use a bottle to trigger the sensor

A visitor may try to activate the sensor with a phone, bottle or other object. This does not represent normal use and may cause unexpected water flow or damage. The sensor’s detection behaviour is part of the installed design.

Use the normal hand position once. If the fitting does not respond, stop and report. Do not pour water over the sensor or attempt to trick it into activating.

29. Do not tape the sensor on

Taping over the sensor may cause continuous activation, conceal a broken lens or leave adhesive residue. It can also make the tap unsuitable for the next user. A sensor tap should be adjusted and repaired only by authorised staff.

Do not place paper, stickers or bags over the sensor window. Tell the operator what happened and leave the control in its original state. A maintenance worker can decide whether cleaning, calibration or replacement is necessary.

30. A Punggol mall example

A parent visits a public toilet at a Punggol shopping centre and finds that the basin tap does not activate. Two neighbouring taps work normally. The parent uses another basin and informs the cleaner which tap is affected, rather than assuming the whole water supply is down.

This is a hypothetical example and does not allege a fault at any named Punggol mall. It shows how a simple observation can help the operator identify a local fitting problem.

31. A park toilet example

A jogger uses a public toilet in a park and notices that a tap continues flowing after hands are removed. The jogger does not twist the spout or turn a hidden valve. They inform the park or facilities operator and identify the affected basin.

This example is illustrative, not a statement that a Punggol park toilet currently has a faulty tap. The key point is to report water wastage promptly and leave the repair to the responsible operator.

32. A water-supply interruption example

Several visitors report that all the basins on one floor have no water. The facilities team checks whether the building has a planned interruption and whether other fixtures are affected. If the issue appears to involve the wider water supply, the operator may contact PUB through its official route.

The public should not open risers, switchrooms or water valves to investigate. A building-wide issue requires the owner and water agency to coordinate safely. A single tap not responding may need a different response.

33. What to say in a report

A useful report might say: ‘At [Punggol premises], Level [number], the basin [position] has a sensor tap that [does not activate / keeps running / sprays sideways]. I noticed this at [date/time]. Nearby taps [do/do not] work. Please inspect and make safe.’

This statement avoids guessing whether the sensor, valve or supply has failed. It gives the operator enough information to find the correct fitting and decide whether a plumber or electrical technician is needed.

34. What if the tap is still running when you leave?

If the tap continues flowing, tell staff immediately and explain whether water is reaching the floor. Do not stay in the restroom trying to block the flow with personal items. If staff are not visible, use the facility’s published contact or help channel.

A continuing leak may waste water and create a slip hazard. The operator can arrange isolation or temporary closure. If the water reaches electrical equipment or creates an immediate hazard, keep clear and seek urgent assistance.

35. What if the tap starts working after a delay?

An intermittent tap may work on a second visit or after the sensor has been cleaned. That does not establish that the fault is gone. Record the time and the exact behaviour, especially if it has happened more than once.

Do not repeatedly test the same tap. A maintenance team can examine intermittent faults using the proper service process. A clear history helps distinguish an isolated user interaction from a recurring defect.

36. Why repair timing depends on the fault

A simple cleaning task may be resolved quickly, while a faulty valve, electrical supply or internal pipe connection may require parts and a qualified contractor. A building manager may temporarily close one basin while keeping other facilities open.

Do not promise a fixed repair time or claim that every fault must be fixed within one hour. Report the condition and follow the actual operator’s updates. A temporary alternative basin can be useful, but it does not replace the need to repair the defective fitting.

37. How maintenance records help

NEA recommends public toilet owners keep inspection and maintenance arrangements for their facilities. A report that gives the correct basin and time can be matched to cleaning or repair records. Repeated problems may indicate that the fitting needs more than routine wiping.

If the fault returns, quote the earlier report or case number. Avoid accusing the cleaner of negligence: cleaning and plumbing repair are different roles. The operator can decide which team should inspect the unit.

38. Water conservation without unsafe interference

A tap that runs continuously wastes treated water. The right response is to report it and allow the owner or PUB to address the fitting. Water conservation does not mean a member of the public should shut an unknown isolation valve or tamper with a shared control.

PUB’s water-efficiency guidance explains the role of appropriate water fittings and maintenance. A visitor can help by reporting leaks and avoiding unnecessary use without attempting technical repair.

39. When a tap appears unsafe to touch

A loose, cracked or electrically exposed sensor fitting should not be used. If the basin is wet around a power point or a component is visibly broken, keep clear and alert staff. Do not use a wet hand to touch a damaged electrical fitting.

The premises operator should isolate the area if necessary and arrange inspection. A normal no-water fault is not the same as an electrical hazard, so describe exactly what you see and seek the appropriate urgency.

40. The practical takeaway

A public sensor tap should deliver water reliably and stop according to its intended operation. When it does not, use another basin, protect privacy, report the exact unit and leave repairs to the operator. A tap problem should not be confused with a WC flush sensor fault or a building-wide water interruption.

NEA’s maintenance advice and PUB’s water-fitting guidance make the division clear: owners maintain public toilet fixtures, while PUB provides official support for water-supply and fitting issues. Accurate, prompt reports help restore a hygienic place to wash hands and reduce avoidable water wastage.

Public sensor-tap reporting checklist

1. Identify the building, floor, toilet block and exact basin position.
2. Describe whether the tap does not activate, runs continuously, sprays sideways or leaks.
3. Try the normal hand position once; do not strike, cover or dismantle the sensor.
4. Use another basin if available and report the fault to onsite staff.
5. Keep clear of wet floors, exposed wiring or damaged fittings.
6. For a public toilet, notify its owner or facilities operator as the first step.
7. Use PUB’s official contact route for wider supply or water-fitting concerns where appropriate.
8. Do not turn unknown valves, open plumbing panels or tape the sensor.
9. Take only a privacy-safe photograph if useful.
10. Keep a case reference and report recurring faults factually.

Frequently asked questions

Why does a sensor tap not turn on?

The problem may be at the sensor, control, valve, power source or water supply. The operator must inspect the installed fitting.

What if the tap keeps running?

Tell staff promptly because it wastes water and may create a wet-floor hazard. Do not block the spout or open the housing.

Can I wave an object in front of the sensor?

Use the normal hand position once. Do not use phones, bottles or other objects to trigger it.

Can I cover the sensor with tape?

No. That can cause continuous flow or damage the fitting. Leave repairs to authorised staff.

Who maintains a tap in a shopping mall toilet?

The mall or premises facilities operator is normally the first contact for its public toilet fixtures.

Who maintains a park toilet tap?

The responsible park or toilet operator. Use onsite signs or official park contact information.

Should I call PUB for every broken tap?

Start with the building or toilet management for an isolated fitting. PUB’s official help and contact channels are for water-supply and relevant water-fitting matters.

What is PUB’s 24-hour call centre number?

PUB’s current official Contact Us page lists 1800-CALL-PUB (1800-2255-782) locally.

What if only one tap is not working?

Report that particular basin. Other taps functioning nearby may suggest the issue is local, but the operator must confirm.

What if all taps are dry?

Tell facilities staff that several fittings are affected and ask whether a planned or wider water-supply interruption exists.

What if the water looks discoloured?

Stop using that tap and notify management. Follow PUB’s official water-quality guidance if the issue may involve the supply.

Can I unscrew the aerator?

No. Do not dismantle public fittings or use sharp objects to clear the spout.

What if the tap sprays sideways?

Stop using it and report the spout or fitting condition. Do not adjust or force the nozzle.

Is a sensor tap the same as an automatic toilet flush?

No. One controls basin water; the other flushes a WC or urinal.

Does NEA require owners to maintain public toilet taps?

NEA advises owners to keep all toilet facilities in good working order and rectify leaks and defects promptly.

Can I photograph the fault?

Only if the basin is unoccupied and the image does not capture other users. A text report is sufficient when privacy is at risk.

Can I close the water valve myself?

Do not turn an unknown shared valve. Contact the facility operator or PUB as appropriate.

What if water is pooling on the floor?

Warn staff promptly and keep clear. The cleaner may need to isolate and dry the area while maintenance repairs the leak.

What if the tap works again after a few minutes?

Report intermittent behaviour if it recurs. One successful activation does not establish that the underlying fault has been fixed.

What is the shortest useful report?

‘At [Punggol building/floor], basin [position] tap [does not activate/runs continuously/leaks] at [time/date]; please inspect.’

Official sources and related Punggol reading

• NEA — Advisory to Owners of Public Toilets: Working Fixtures and Prompt Leak Rectification
• PUB — Water Fittings Standards, Taps and Mixers
• PUB — Official Contact Us and 24-Hour Call Centre
• PUB — Help and Feedback: Water Supply and Damaged Drains
• PUB — Water Quality: Discoloured Water and Local Fitting Issues
• NEA — Code of Practice on Environmental Health (2025 Edition)
• eduKate Punggol — Automatic WC and Urinal Flush Sensor Problems
• eduKate Punggol — Public Toilet Soap and Hand Dryer Problems

Updated 15 November 2026. This guide concerns public wash-basin sensor taps, not WC or urinal flush valves. It does not allege that any named Punggol toilet has a faulty tap. Owners and facilities operators maintain their installed fixtures; contact PUB through its official channels for relevant water-supply or water-fitting concerns.