Neutralising Filters for Acid Water - Wellington Water Filters and Kapiti Pure Water

Neutralising Filters for Acidic Water

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.

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"	15	$ 749.00
MN935	25	9" x 35"	1"	25	$ 815.00
MN1054	50	10" x 54"	1"	45	$ 1120.00

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

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 ½" ( 15mm ) 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"	½"	10	$ 506.00
UFN 735	15	7" x 35"	½"	15	$ 649.00
UFN 935	25	9" x 35"	½"	25	$ 715.00

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.