Glossary Terms

May 3, 2017

sludge

The solids which are separated from water during processing.
May 3, 2017

silica gel or siliceous gel

A synthetic hydrated sodium aluminosilicate with ion exchange properties, once widely used in ion exchange water softeners. (See zeolite, gel zeolite.)
May 3, 2017

shielded

The separation of metallic parts by an electrical nonconductor; insulated by other than an air gap.
May 3, 2017

service unit

A term sometimes applied to softeners or filters which are regenerated or backwashed at a central point, then transported to the point of use for connection […]
May 3, 2017

service run

That portion of the operating cycle of a water conditioning unit in which treated water is being delivered, as opposed to the period when the unit […]
May 3, 2017

sequestration

A chemical reaction in which certain ions are bound into a stable, water soluble compound, thus preventing undesirable action by the ions. (See chelate.)
May 3, 2017

sequestering agent

1. A chemical that forms complexes with metallic ions in solution so that the metallic ions may no longer be precipitated. For example, calcium soap precipitates […]
May 3, 2017

septic

A condition produced by bacteria when all oxygen supplies are depleted. If severe, bottom deposits appear and water turns black, gives off foul odors, and the […]
May 3, 2017

semi-permeable membrane

Typically a thin, organic film which allows the passage of some ions or materials while preventing the passage of others. Some membranes will only allow the […]