NZ Filter Warehouse Limited Water Title 1
NZ Filter Warehouse Limited Water Title
NZ Filter Warehouse Limited Logo  
Water Filter Cartridge Ultraviolet Logo

CALCITE - PH Increase NSF Media


PH Increase NSF Media
Calcite PH Increase and Neutralizing Media. NSF Approved and Made in the USA. The main advantage is that Calcite in most conditions in NZ it will not over correct acidic water, so it will not waste the media. These heavy 22.68Kg bags and will not be delivered for our online freight offer but we will be happy to quote delivery to your closest towns freight depot to be collected at your convenience.

A click and collect Product only.
NZ$ 189.90 including GST
22.68 KG bag
Purchase Qty:

Calcite is a crushed and screened white marble media which can inexpensively be used to neutralize acidic or low pH waters to a neutral, less corrosive effluent.

Calcite is a naturally occurring calcium carbonate media. One of the advantages of Calcite is its self-limiting property. When properly applied, it corrects pH only enough to reach a non-corrosive equilibrium. It does not overcorrect under normal conditions. Upon contact with Calcite, acidic waters slowly dissolve the calcium carbonate to raise the pH which reduces the potential leaching of copper, lead and other metals found in typical plumbing systems. Periodic backwashing will prevent packing, reclassify the bed and maintain high service rates. Depending on pH, water chemistry and service flow, the Calcite bed will have to be periodically replenished as the Calcite is depleted.

As the Calcite's calcium carbonate neutralizes the water, it will increase hardness and a softener may become necessary after the neutralizing filter.

Calcite can be effectively combined with Clack Corosex to combine the high flow neutralization properties of Corosex, along with the slower reacting low flow properties of Calcite, increasing the ability to correct low pH.


  • – Naturally occurring material

  • – Low uniformity coefficient for maximum contact for controlled correction

  • – Slower reacting for controlled correction

  • – Inexpensive


  • – Color: Near white

  • – Bulk Density: 90 lbs./cu.ft.

  • – Mesh Size: 16 x 40

  • – Specific Gravity: 2.7

  • – Effective Size: 0.4 mm

  • – Uniformity Coefficient: 1.5

  • – Hardness: 3.0 {Mohs scale)

  • – Composition: CaCO3, 95% min.

MgCO3, 3.0% max.


  • – A gravel support bed is recommended

  • – Water pH range: 5.0-7.0

  • – Bed depth: 24-30 in.

  • – Freeboard: 50% of bed depth

  • – Backwash rate: 8-12 gpm/sq.ft.

  • – Backwash Bed Expansion: 35% of bed depth

  • – Service flow rate: 3-6 gpm/sq.ft. but may be modified to adapt to local conditions


© Copyright NZ Filter Warehouse Ltd - Site Map Phone: 09 2785548 Manukau New Zealand