Neutralizing Filters


Reduction of Water Acidity

pH is an indicator of the acid or alkaline condition of water. The pH scale ranges from 0-14; 7 indicates the theoretical neutral point. Water with a pH value less than 7 indicates acidity and tends to be corrosive and has the potential to corrode plumbing lines and water-based systems that can result in heavy replacement costs of replacement of piping and components, constant investment, down time and labor costs.

Envirogard’s neutralizing filters are designed to improve (increase) the pH of water in such situations. Symptoms of low pH are bluish green stains on fixtures with copper plumbing; reddish stains with galvanized iron plumbing; and water system corrosion problems and plumbing leaks.

Envirogard’s neutralizing filters incorporate calcite or ground limestone (calcium carbonate) to raise the pH. An automatic control valve sets off back washing periodically as the neutralizing filter also serves as a mechanical filter to remove solid particles from the water. When acidic water flows through the filter, hardness is added to the water (which needs to be evaluated for down-stream applications). This happens as a result of adding calcium and magnesium minerals, which the water absorbs when passing through the filter. Installing a cartridge filter prior to the neutralizing filter will remove solid particles from the water and can help to prolong the life of the neutralizing filter.

Note: For high yield water supplies, an alternate method of neutralizing acidic water is to feed a solution of soda ash to the water supply with a chemical feed pump. Call Envirogard for details.

Contact us for more information on Acid Neutralizing Filters.