Product description
pH correction cartridge for neutralising acidic water
The pH Correction Filter Cartridge is designed to raise the pH of acidic water and stabilise water chemistry in drinking water and technical water applications. By gradually dissolving neutralising media, the cartridge helps reduce the corrosive effects of acidic water and limits the leaching of metals such as copper and lead from pipework.
This cartridge is commonly used for post reverse osmosis treatment, private water supplies and general remineralisation applications where controlled pH adjustment is required.
Filtration principle
The pH correction cartridge works through controlled dissolution of alkaline mineral media when acidic water passes through the cartridge. As the media dissolves, it increases alkalinity and raises the pH of the treated water towards a neutral range.
This process provides:
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gradual and controlled pH increase
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reduced water corrosivity
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improved water stability
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protection of downstream plumbing systems
The cartridge operates without chemical dosing and requires no external control systems.
Filter media
The pH correction cartridge is filled with a blended mineral media composed of:
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calcium carbonate (CaCO₃)
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magnesium carbonate (MgCO₃)
This combination allows effective pH correction while also contributing to remineralisation of treated water.
Performance characteristics
Typical performance characteristics include:
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effective neutralisation of acidic feed water
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stable pH correction over the cartridge service life
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suitability for low to moderate acidity levels
Actual capacity depends on feed water pH, free carbon dioxide concentration and cartridge size.
Operating conditions
Typical operating parameters include:
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operating temperature range from 4 to 38 °C
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maximum operating pressure of 6.9 bar
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maximum pressure differential of 1.0 bar at 21 °C
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suitable feed water pH range from 5 to 6.5
The cartridge is designed for cold water use only.
Cartridge configurations
pH correction cartridges are available in the following configurations:
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cartridge lengths: 10 inch and 20 inch
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diameter: large diameter (Big Blue) only
The large diameter design provides extended contact time and higher media volume for effective pH correction.
Typical applications
pH correction cartridges are commonly used in:
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post reverse osmosis permeate treatment
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private and borehole water supplies
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drinking water treatment systems
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remineralisation after demineralisation
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corrosion control in plumbing systems
They are often installed as part of a multi stage water treatment system.
Key benefits
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Raises pH of acidic water
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Reduces corrosive water behaviour
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Helps protect pipework and fittings
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Supports remineralisation
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No chemical dosing required
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Simple cartridge replacement
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Large diameter design for extended service life
Installation considerations
For best performance, the pH correction cartridge should be installed:
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downstream of sediment and carbon filtration
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after reverse osmosis where remineralisation is required
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in a housing designed for large diameter cartridges
Correct flow rate selection ensures sufficient contact time for effective pH correction.
Configuration and quotation
pH correction filter cartridges are supplied based on cartridge length and system requirements. Selection depends on:
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feed water pH
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free carbon dioxide concentration
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desired pH correction level
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flow rate
Filtra International provides technical support to ensure correct cartridge selection and system configuration.