text: It is advisable to provide a preconditioned ( deionized ) feed water by using a Culligana , Continentala , or equivalent system in front of the MILLIPOREa System to extend the life of the MILLIPOREa cartridges ( see Section 5 , Facilities , Equipment , and Supplies ) .
  
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  The MILLIPOREa cartridges are very fragile and prone to breaking .