Tank Cleaning Works

Service requirement

As per Singapore legal requirement (PUB, Singapore), all management corporations and building owners shall clean, disinfect sterilize and obtain certification for their potable water tank on yearly basis. The water tank referred is potable water tank used to store the water supplied by PUB for drinking purposes.

Purpose of water tank maintenance

The main purposes of the water tank cleaning are listed below (but not limited to)

  • To comply with legal requirements set by PUB, Singapore for water storage tanks
  • To ensure the water is fit and safe for the storage of water for human consumption
  • To ensure the water is free from any contamination / pollution / bacterial growth /moss / leakage
  • To ensure the water is in compliance with latest legal requirements by PUB, Singapore
  • To ensure the security features for the water tank is in-line
         with the legal requirement as stipulated by PUB, Singapore

For more details from PUB Singapore click here

Skilled personnel requirement

Licensed plumber

  • To visit potable water tank installed location for verifying the tank constructed as per PUB standards
  • To notify PUB about commencement and completion of the water tank cleaning
  • To supervise the water tank cleaning and sterilization works
  • To notify PUB upon successful completion of the tank cleaning

Waves Fluid Engineering Pte Ltd have competent PUB approved licensed plumbers who shall visit the water storage tank and ensure the water tank is in-line with all latest PUB Singapore requirement

Confined Space Safety Assessor

  • To perform gas test for the tank to ensure
         the water tank is safe for entry by entrants (cleaning workers)
  • To discharge all duties as detailed in WSH (Confined Space) regulations 2009
  • Waves Fluid Engineering Pte Ltd have MOM approved certified and competent confined
         space safety assessor to perform the gas checks and other duties as required

Confined space supervisor

  • To supervise the water tank cleaning and sterilization workers while performing the tank cleaning
  • To discharge all duties as detailed in WSH (Confined Space) regulations 2009
  • All supervisors in Waves Fluid Engineering Pte Ltd are MOM
         certified and competent confined space supervisors

Confined space attendant

  • To standby at the confined space entrance to monitor
         the tank cleaning worker entering the tank for cleaning / sterilization.

All workers involved for water tank cleaning are medically certified by designated workplace safety and health doctors for safe to enter tank and free from any water-borne disease and competent in confined space entry course

Confined space entrant

  • To enter the water tank for cleaning, sterilization and repair works as required

All workers involved for water tank cleaning are medically certified by designated workplace safety and health doctors for safe to enter tank and free from any water-borne disease and competent in confined space entry course

Rescue team

  • To proceed with the rescue of entrants (cleaning works) as and when required

Waves Fluid Engineering Pte Ltd has competent, experienced and trained rescue team

Products required

While cleaning

  • Scrubber
  • Pressure jet
  • Chlorine solution

While sterilization

  • Chlorine solution

Note: Safety Data Sheet of the chlorine to be used for water tank cleaning and sterilization shall be submitted to the client before the start of the work

Equipment required

  • 4-in-1 gas detector for the confined space safety assessor
  • Personal gas detector to the entrant (water tank cleaning worker)
  • Rescue tripod for the use by rescue team to use, in case of emergency
  • Safety harness for the workers entering the water tank for cleaning
  • Waterproof coverall for all workers entering the water tank for cleaning
  • Rubber Boots for all workers entering the water tank for cleaning

External parties involved

  • Singapore Accreditation Council-SINGLAS approved water
         testing laboratory to test the water sample collected from the cleaned and sterilized water tank

Procedure for tank cleaning

  • Upon receiving the confirmation order from client,
         Waves Fluid Engineering Pte Ltd shall send our Licensed Plumber for onsite
         checking of the tank to ensure compliance with latest PUB requirement

Note: Waves Fluid Engineering Pte Ltd shall not proceed with the tank cleaning and sterilization works if the licensed plumber detects / identified any non-compliance in the water tank to be cleaned

  • Isolation of the tank (LOTO to inlet pipe and outlet pipe)
  • Starts cleaning outside the tank and manhole covers then enter the water tank.
         Water tank / compartment cleaning sequence scrubbing / water jet cleaning the sides
         of the tank below the overflow pipe level, chlorine disinfection to the water
         tank level above the overflow pipe and the roof of the water tank
  • Repeat the above steps until the tank is thoroughly cleared

Procedure for tank sterilization

  • Open the incoming pipe
  • Fill the water tank up to overflow level
  • Add chlorine solution as per the PUB guidelines
  • Keep the tank water filled with this sterilization mix for next 24 hours
  • Next day discharge the sterilization water mix and open the inlet valve
  • Collect water sample from the water tank and send to Singapore Accreditation Council-SINGLAS laboratory for water sample analysis
  • Once the water sample test result is obtained and deemed safe as per PUB guidelines,
         repeat the same procedure for the next compartment of the water tank

Need a quote from Waves Fluid Engineering for potable water tank cleaning and sterilization?

Please contact us at +6591680720 / +6598233464 or email us at sales@wavesfluid.com.sg for further details and discussions.