Filter Man

 

Wellington Water Filters
and
Kapiti Pure Water

 

 

Phone:  (04) 904 7873
              0800 115 516

Fax:      (04) 902 7875
 

 

 

39 Amohia Street
Paraparaumu
New Zealand

 

 

 

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Locally Owned and Operated
 
 

Acidic Neutralising Filters

 

 

Are you having Acidic Water problems ...
Green / Blue Staining from Copper Corrosion?

 

       
 

When Carbon Dioxide (CO2) dissolves in water it lowers the pH* of the water ( typically to between 5.5 and 6.8 ), thus making the water aggressive toward metal plumbing and fittings. The result of this is generally green staining on baths and basins as well as bitter tasting water.

 

This water is also very aggressive toward copper hot water cylinders. This is very common with rain water or bore based water supplies which generally have a low pH.

 

The solution is simple, by installing a pH Neutralising Filter, which will correct the pH of the water to a neutral pH (between 7.0 and 8.0)... the problem is solved. This is a clean safe way of fixing the problem without the addition of any chemicals.

 

The media is made of specially heat treated Dolomite limestone granules called Akdolit. This media has a high surface area that enables it to react quickly and efficiently. It is sacrificial and will need to be topped up periodically.

 

Maintenance is very simple. Backwash for 5 minutes once per week and replenish with fresh media as required, usually around every 3 to 6 months.

 

* pH is a measurement of acidity in both liquids & some solids.
The scale ranges from very acidic at 5 to very alkaline at 9.
A Neutral pH is measured as 7 on the scale.

  Neutralising Filter
       

 

 

 

Standard Back Washable Systems

 

Standard systems are designed to be back washed periodically to remove any built up dirt and sediment and to lift and 'fluff up' the media to enhance water distribution through the media.

 

Model No Typical Flow
( litres per min )
Filter Tank Size
( D x H in inches )
Inlet / Outlet
( Inches)
Akdolit Media
( Kg )
Price
( Excl GST )
MN735 15 7" x 35" 1 inch 15 $   573.00
MN844 25 9" x 35" 1 inch 25 $   660.00
MN1054 50 10" x 54" 1 inch 45 $   909.00

 

 

Minimum operating pressure 138 kpa ( 20 psi)
Maximum operating pressure 680kpa ( 100psi)

 

Note: Prices exclude GST. Please allow $20.00 for delivery.

 

 

 

Upflow Neutralising Filters

 

Smaller systems can be designed as an "Upflow" system which does not require backwashing as the system is literally plumbed in reverse so that the water enters from the base of the tank and therefore continuously lifts and mixes the media.

 

Upflow filters are suitable only for lower flow rates ( Max 30 litres per minute ) as the outlet of the system is restricted to a ¾ inch ( 20mm ) outlet. They are ideal for small to medium houses or where water is treated to a storage tank.

 

 

Model No Typical Flow
( litres per min )
Filter Tank Size
( D x H in inches )
Inlet / Outlet
( Inches)
Akdolit Media
( Kg )
Price
( Excl GST )
UFN 618 15 6" x 18" ¾ inch 10 $ 290.00
UFN 735 20 7" x 35" ¾ inch 15 $ 378.00
UFN 844 25 9" x 35" ¾ inch 25 $ 466.00

 

 

Note: Prices exclude GST. Please allow $20.00 for delivery.

 

 

 

Notes:

 

  • What is Akdolit?

    Akdolit is made by heating natural Calcined Dolomite to 600 degrees Celsius.
    The heat treatment process changes the natural Dolomite form CaCo3.MgCO3 to CaCO3MgO.


  • The size of the system will to some extent be dependent on the level of acidity in the
    water as well as other parameters. If you do not have a recent water test available,
    we may need to take a water sample before we can recommend a suitable system.
    A full comprehensive water test costs $ 120.00 incl. GST.

  • An Automatic backwash assembly can be fitted to automatically reverse the flow through the system every week. Please add an extra $ 500.00 + GST for this option.

  • Replacement Akdolit retails for $ 8.00 per Kg + GST.

  • Please Contact Us for further details about a Neutralising Filter for your particular situation.