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  Top » Catalog » FAQ » Media Filters, Pre/Post Treatmnt
Media Filters, Pre/Post Treatmnt

Media Filters/Pre & Post Treatment

  1. How long will 1 cubic foot of Calcite last?
  2. How much calcite is required to neutralize the water?
  3. Where is Calcite used?
  4. Do Pyrolox filters require a gravel underbedding?
  5. Will Chlorine destroy the Pyrolox media?
  6. Why is a daily back-wash necessary when using Pyrolox?
  7. What is the life expectancy of Pyrolox?
  8. What pH range is ideal for Pyrolox?
  9. Are there any impurities that are a problem for Pyrolox?
  10. What are the limits of removal by Pyrolox?
  11. What is Pyrolox and what is it used for?
  12. How often do I need to add Salt to my Brine Tank? How Much?
  13. How do you dispose of the resin in a water softener?
  14. How often should I change the resin in a water softener?
  15. Would soft water be preferred as feed for an RO?
  16. What is the total time to regenerate a water softener?
  17. How long does the brine refill take for a Water Softener?
  18. How long is the Rapid rinse for a Water Softener?
  19. How long is the brine and slow rinse for a Water Softener?
  20. How long is the backwash time for a Water Softener?

  1. How long will 1 cubic foot of Calcite last?
    a. Multiply the liters of water used by amount of carbon dioxide in mg/l. Let us call this number X.
    b. Divide 96,800,000 by ‘X’. This will give you the number of days 1 cubic foot of Calcite will last.

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  2. How much calcite is required to neutralize the water?

    Each 100 mg/l of Calcite will neutralize 44 mg/l of carbon dioxide. So 1 cubic foot (about 100lbs) of Calcite will treat about 96,800,000 mg of carbon dioxide. If water has 20 mg/l of carbon dioxide then 1 cubic foot will treat: (96,800,000 / 20) liters of water. Or 4,840,000 liters or 1,278,730 gallons of water. If the water usage is 10,000 gallons/day, then 1 cubic foot of Calcite will last 128 days.



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  3. Where is Calcite used?

    Adding calcite to water gives water alkalinity which offsets the acidity (low pH) of water caused by dissolved carbon dioxide.

    Carbon dioxide in small amounts is present in all natural waters. In reverse osmosis membranes remove the alkalinity present in water but not the carbon dioxide, because it is a gas. This creates a low pH in the product water.



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  4. Do Pyrolox filters require a gravel underbedding?

    Yes. Without and underbed you will find the filter can have a poor backwash distribution. It is important to use an underbed that is heavier than Pyrolox to prevent migration into the media.



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  5. Will Chlorine destroy the Pyrolox media?

    No. Actually, using chlorine or other oxidants is strongly recommended as they will extend the life of the media.



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  6. Why is a daily back-wash necessary when using Pyrolox?

    Back-washing removes contaminants on the surface of the media allowing for better performance. Since Pyrolox™ turns sulfur, iron, and manganese into a particulate, the solids begin to coat the surface of the media, weakening its oxidation capacity. Thorough back-washing keeps the surface of the media free to continue the oxidation process.



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  7. What is the life expectancy of Pyrolox?

    The medium will last for an indefinite time. However, about 10-15% per year is lost due to attrition or lost fine media during backwash and should be replaced.



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  8. What pH range is ideal for Pyrolox?

    Pyrolox works best between a pH range of 5 to 9. Ideal pH is between 6.5 and 7.



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  9. Are there any impurities that are a problem for Pyrolox?

    Yes. Organic iron, sulfur, bacteria, tannins, chloride levels over 500 mg/l are all either not removed or affect the efficiency of the Pyrolox filter.



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  10. What are the limits of removal by Pyrolox?

    These are the limits:
    pH 5-9 ( Best at pH higher than 6.5 )
    Hydrogen sulfide 10 mg/l
    Iron 10 mg/l
    Manganese 8 mg/l



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  11. What is Pyrolox and what is it used for?

    Pyrolox is a granular water filtration media used for the removal of hydrogen sulfide, iron and manganese. Through a natural chemical reaction, Pyrolox has the ability to help you produce clean, high-quality water. Pyrolox works because of a catalyst reaction whereby hydrogen sulfide, iron, and manganese are oxidized on the media. Daily backwashing then flushes trapped particulate from the filter bed. Pyrolox is a natural mineral form of manganese dioxide, making it an environmentally sound means of water filtration.



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  12. How often do I need to add Salt to my Brine Tank? How Much?

    The brine tank should be filled with salt to slightly above the water level. The tank is self filling, so no additional water needs to be added. Check the tank regularly, and add salt as necessary to maintain the proper level of salt.



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  13. How do you dispose of the resin in a water softener?

    Softening Resin Disposal. It is a non-hazardous product that you can throw out with regular trash.



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  14. How often should I change the resin in a water softener?

    Softening Resin Life (Approximate):
    No chlorine: 8 years
    Chlorine: 3-4 years



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  15. Would soft water be preferred as feed for an RO?

    Hardness is easily precipitated as a scale on the membrane surface as the pure water is removed by the membrane. For residential membranes, the removal of the hardness may prolong the membrane life if the soft water is used.



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  16. What is the total time to regenerate a water softener?

    The total to regenerate is between 1.5 to 2 hours.



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  17. How long does the brine refill take for a Water Softener?

    This time is a minimum of 4 minutes.



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  18. How long is the Rapid rinse for a Water Softener?

    Rapid rinse is typically 10 minutes minimum.



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  19. How long is the brine and slow rinse for a Water Softener?

    This depends on
    the salt dosage selected for the softener. The default setting is 60 minutes.

    Salt Dosage, lb/cuft Brine and Slow rinse Time, minutes

    5

    60
    10 80
    15 100


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  20. How long is the backwash time for a Water Softener?
    Minimum backwash time is 5 minutes. Generally the backwash time is factory set at 10 minutes. If the water is not clear then the backwash time can be as long as 20 minutes.

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