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  • Writer's pictureKelly Bryant

CWS or Sack Frame?

If you're unsure whether to use the CWS or Sack Frames, we've put together this explainer to help...

​CWS

Single/Double Sack Frame

Requires 110V Power

No Power required (unless using submersible pump)

Indefinite recycle of wash water

Immediate discharge

pH control required at end of use

pH control required throughout

Uses water from CWS

Uses water from truck

CWS Concrete Washout

All solids are retained in the Adsorption Sack, each sack will take up to 50wash offs. The CWS will recycle washwater indefinitely without needing to be emptied.

For pH correction this system requires manual adding of 2-4drums pH neutraliser. System requires 110V Power supply.

Recommended - The CWS is the easiest to use and most efficient washout for retaining solids, recycling washwater and neutralising pH.


Double or Single Sack Frame

All solids are retained in the Adsorption Sack, each sack will take up to 50wash offs.

These systems require manual adding of reducer in 50ml doses, mixing/agitation & checking pH in between each additional dose until desired pH is achieved.

Double Sack Frames provide the added benefit of no downtime as the system has 2no sacks, allowing you to continue washing into 1 sack whilst replacing the other. Also a larger water capacity allows for less frequent pH treatment.


Bulk discounts available on Adsorption Sacks:



If you're still unsure or need any additional info, please give us a call +44 (0)1889 508944.


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