Imerys

Calcite pH Neutralizing Media (1317-65-3)

Naturally occurring calcium carbonate that corrects acidic water without overcorrection

16x40 Mesh 95% CaCO₃ Self-Limiting 1 Lb.

Calcite dissolves slowly in acidic water to raise pH and reduce metal leaching from pipes. Its self-limiting chemistry stops at a non-corrosive equilibrium, preventing the overcorrection common with other neutralizing media.

HOW IT WORKS

Controlled pH Correction Through Dissolution

CONTACT

Acidic Water Entry

Low pH water (5.0-7.0) enters the calcite bed at 3-6 gpm per square foot. The 16x40 mesh size and 1.5 uniformity coefficient ensure consistent contact time without channeling.

DISSOLUTION

Calcium Carbonate Release

The acidic water slowly dissolves calcium carbonate from the calcite media. This controlled reaction raises pH gradually, preventing the alkaline spikes that damage plumbing and taste.

EQUILIBRIUM

Self-Limiting Correction

As pH rises to non-corrosive levels, dissolution slows and stops naturally. Backwash at 8-12 gpm per square foot every few weeks to reclassify the bed and prevent packing.

SPECIFICATIONS

Physical Properties

Composition	CaCO₃ 95% min., MgCO₃ 3% max.
Mesh Size	16 x 40
Effective Size	0.4 mm
Uniformity Coefficient	1.5
Bulk Density	90 lbs./cu. ft.
Specific Gravity	2.7
Hardness	3.0 Mohs
Color	Near white

OPERATING CONDITIONS

Installation Requirements

Water pH Range	5.0 - 7.0
Bed Depth	24 - 30 inches
Freeboard	50% of bed depth (minimum)
Service Flow Rate	3 - 6 gpm/sq. ft.
Backwash Rate	8 - 12 gpm/sq. ft.
Backwash Expansion	35% of bed depth
Gravel Support	Recommended

COMPATIBILITY

System Considerations

The IPW Industries 1317-65-3 calcite media requires a properly sized neutralizing tank with gravel underbed support and adequate freeboard for backwashing. As the calcium carbonate neutralizes acidic water, it increases hardness levels, so plan for a water softener downstream if your source water already contains moderate hardness. Calcite depletes over time based on influent pH and flow rates, so periodic media replenishment is part of normal operation. This 1 lb. package is suitable for topping off existing beds or testing small-scale applications before committing to bulk quantities.

Clean Drinking Water

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Clean Drinking Water

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IPW Industries Inc (1317-65-3) Calcite - Neutralizes Low pH or Acidic Water - 1 Lb.

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