All sensor flush valves must meet specified standards

PUB, the national water agency, thanks Mr Lim Boon Seng for his letter (Auto-sensor toilets can waste a lot of water; Forum Online, March 9) and is heartened by his interest in water conservation.

PUB has followed up with Mr Lim on the details pertaining to his experience and investigated the matter with the relevant building management.

To safeguard public health and for hygiene reasons, public toilets are required to be fitted with sensor-operated flush valves. This requirement for public toilets is stated in the Code of Practice for Environmental Health by the National Environment Agency.

All sensor flush valves must meet the requirements specified by PUB to ensure their proper operation before they can be sold or installed. Flushing should be activated only after the user moves out of the sensing distance.

Building managements are required to carry out regular maintenance to ensure that the sensors for flush valves continue to perform properly, so that unwanted and multiple flushing does not occur.

They are also encouraged to display the contact numbers of the building maintenance service in the public toilets. This will help the public to report any faulty fittings for immediate rectification to minimise water wastage.

PUB conducts spot checks on water fittings installed in public toilets and will advise building owners if fittings are not maintained properly. If they fail to comply, enforcement action will be taken.

The public can report any faulty flush valves, taps or water fittings to the buildings' management or PUB's 24-hour Call Centre on 1800-CALL-PUB (1800-2255-782).

Michael Toh


Water Supply Network Department