Purachem HSC1 Physical Properties


Pale yellow liquid


Low Viscosity


1.05 - 1.2g/cm³


Chlorine / Beach


No foam


12.5 (1% solution)

Active Alkalinity:

1 - 10%

Active Biocide:

<3% active Cl.

Available in:

5, 10, 15, 20, 25, 205 & 1000 litre containers and bulk tankers.


For a quote or assistance

Tel: (021) 385 0908

Industrial Strength Chlorinated Pipework Cleanser, with Alkaline Builders and Sequestrants. Especially formulated to neutralise, suspend and remove heavy biological growth, slime and silt within cooling and heating systems.

Purachem HSC1 is a blend of sodium hypochlorite, alkaline builders, sequestrants and water to suit the strength required.


Purachem HSC1 can be used as a pre-commission pipework cleanser. It is ideal for use when implementing a chemical cleaning policy, such as BSRIA BG 29/2012.

Purachem HSC1 is suitable for use in wide range of heating and cooling systems.

Purachem HSC1 can be used to help restore contaminated systems to their original condition. For example after;

Purachem HSC1 is also suitable for cleaning out food processing vessels in dairies etc.


Purachem HSC1 can be supplied in concentrate and in dilute form. The standard concentration requires 25 litres per 1000 litres of system volume. At this strength most contaminated systems can be cleansed in a single operation.

The following procedure, applied in conjunction with the appropriate engineering methods,* will maximise the capabilities of Purachem HSC1

  1. Drain existing system contents. Be sure to empty all dead-legs and open any vents to ensure total drainage.
  2. Refill with fresh water mixed with the appropriate volume of Purachem HSC1 (see above).
  3. Vent the system of any trapped air.
  4. Recirculate for a minimum of two hours and a maximum of 24 hours. Regularly check all filters and clean as necessary.
  5. Repeat 1.
  6. Refill with fresh water.
  7. Repeat 3.
  8. Recirculate for one hour and then take a sample. Test sample to confirm all biological contaminants have been neutralised.
  9. Repeat 1.
  10. Refill with required strength of inhibited heat transfer fluid and good quality fresh water.
  11. Repeat 3.
  12. Re-commission the system and take a second sample for lab analysis. Please refer to the SureFlow Fluid Maintenance Program for more information on sample testing and reports.

For more detailed information on the pre-commission and re-commission cleaning of pipe-work systems, please refer to BSRIA BG 29/2012 guide via


Health & Safety: Please refer to the associated Safety Data Sheet - Available via Login or upon request.

Shelf Life: Minimum of 3 months

Availability: Purachem HSC1 is available from stock in 5, 10, 15, 20, 25, 205 & 1000 litre containers.

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