pH Correction (Acid Water)

Water with a pH of below 7.0 is classed as acidic.

Acidic water accelerates corrosion in metal pipework, causing unsightly staining such as blue/green discolouration on fixtures such as baths, sinks and other appliances. It may also give a metallic taste to the water affecting its use in domestic environments.

pH correction may also reduce iron and manganese contamination. Some water treatment requires that the pH level is raised from its acidic state to an alkaline level for effective process control.

The simplest way to raise the pH is to pass the water with a low pH through a vessel containing a suitable pH correction media. This correction media is usually a mix of Calcium and Magnesium salts. These salts will slowly dissolve into the water raising the pH and re-mineralising naturally. With this process the water cannot be overdosed as the pH will cease to rise at approximately 8.3 at which the pH correction media stops its action with the acidic water.

The simplest method is by using a media vessel with an In/Out head to allow the water to be treated to flow naturally using pressure through the pre-sized vessel to ensure adequate contact to raise the pH to the level required. As the water travels through the media the Calcium and Magnesium salts slowly dissolve into the water raising the pH. The in/Out head is usually fitted with a filling port to top up the dissolves media which is used up by its natural dissolving during the process.

A fully automatic unit is also available which is based upon a pressure filter system with backwash control using either a timeclock or water control to effect better flows with larger volumes. These automatic systems self clean and remove any solids or precipitated iron and manganese that may become trapped in the vessel.

HydroChem uses a number of different pH Correction Media which are suited to a particular application or for Potable use. These are available ex stock, Examples :-

Juraperle

Corrosex

Calcite

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