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Iron and Manganese Reduction (DWI Approved for Private Water*)

Iron and Manganese Reduction (DWI Approved for Private Water*)

Iron and manganese are commonly found in waters. They can cause unsightly staining and they can cause health problems. Catalytic oxidation is a tried and tested method of both oxidising the iron and manganese to form a precipitate and then holding on to it until it is automatically backwashed to drain. This method is good for iron if the pH is over 7 and manganese if the pH is over 8.5. Often this is not the case and iox exchange method comes into its own.

Ion exchange by Crystal Right
Crystal Right ™ removes iron, manganese and hardness (and reduces ammonia). The minimum pH requirement is 6.0 and Crystal Right ™ balances the pH in these acidic waters. Crystal Right ™ works at it’s best on clear water, i.e. when the iron/manganese are in a dissolved form. Crystal Right ™ will also reduce hardness with no extra treatment. The media bed can be sanitised with chlorine from time to time (some valves can do this automatically). The regeneration process is exactly the same as that used in a water softener and requires regeneration with salt (sodium chloride). 

There are two types of Crystal Right ™, CR100 is used where the pH is between 6 and 7 and CR200 is used where the pH is 7 or above. Crystal Right has a number of advantages over conventional systems in that pH correction, iron/manganese removal, ammonia reduction and softening can all be addressed in a single process. It can reduce dissolved iron and manganese even at pH 6 (most other medias can not).

*The Private Water regulations 2009 say products used for drinking water supply in private water installations must be DWI approved. Many of the Whisper Pumps filter systems are approved. 

Find out more about iron and manganese removal in our latest blog here

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