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Progard® XL Pretreatment Pack

For optimal protection of reverse osmosis (RO) membranes from hard water

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Progard® XL-S-C Pretreatment Pack


EPDM rubber cartridge
carbon cartridge (activated )
filter (silver-impregnated activated carbon)
polypropylene and polyethylene cartridge

Quality Level


pkg of 1 unit




2-40 °C temp. range
4.2 L/min flow rate
6 bar max. pressure

H × W × D

20.8 in. × 6.1 in. × 3.1 in.


11 mm female inlet and outlet (O-rings)


for use with AFS®
for use with Elix® Large
for use with Milli-Q® CLX
for use with Milli-Q® HR
for use with Milli-Q® HX
for use with RiOs Large

shipped in


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General description

The Progard® XL-S-C pretreatment pack pretreats feed water by removing large particles and free chlorine from tap water. It protects the RO membrane against mineral scaling, organic fouling, and chlorine oxidation.
The pretreatment pack includes prefiltration to remove particles, activated carbon to remove chlorine, and an anti-scaling agent to minimize the risk of scale formation. The Autoclean pack option includes a built-in chlorine cleaning tablet that will automatically clean the RO membrane when this new pack is installed.
For use with larger RiOs, Elix®, Milli-Q® HR, HX, CLX and AFS® E water purification systems.


The packs protect and maintain good performance of RO membranes in water purification systems.

Features and Benefits

  • Optimal protection of reverse osmosis (RO) membrane.
  • Ensures system lifetime and performance are optimized.
  • Depth-filtration removes particles and colloids.
  • Polyphosphate protects from scaling.
  • Silver-impregnated activated carbon filter reduces free chlorine and provides bacteriostatic protection.
  • EfferSan Effervescent (formerly ROProtect CR) tablets provide automatice RO maintenance.
  • e-Sure tag RFID technology for instant visibility on pack parameters, automatic pack parameters archiving and full traceability.
  • Replace every 6 months for optimal results

Legal Information

AFS is a registered trademark of Merck KGaA, Darmstadt, Germany
ELIX is a registered trademark of Merck KGaA, Darmstadt, Germany
Milli-Q is a registered trademark of Merck KGaA, Darmstadt, Germany
PROGARD is a registered trademark of Merck KGaA, Darmstadt, Germany
RIOS is a trademark of Merck KGaA, Darmstadt, Germany

Storage Class

11 - Combustible Solids

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