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An alphabetical listing of General terms and items. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Leach   To dissolve out by the action of a percolating liquid. Leach Field   The area where the effluent from a septic tank system is distributed by horizontal underground piping designed to aid in the process of natural leaching and percolation through the soil. Legionella   Over 26 species of bacteria, such as Legionella pneumophila, which can cause pneumonia-like illness called "Legioella Disease" (after the American Legion convention at which the disease first drew attention). These bacteria are known to thrive at 100 degrees F and are believed to live in infected humidifiers, cooling tower water and shower rooms. Infection is by inhalation. Lime (CaO)   A calcined chemical material, calcium oxide. Lime Scale   Hard water scale formed in pipes and vessels (generally more severe on the hot water side) containing a high percentage of calcium carbonate (CaCO3) or magnesium carbonate MgCO3). Longitudinal Flow   A flow pattern in which water travels from the bottom to top (or vice versa) in either a cartridge or loose media tank-type filtration system. The advantages are greater contact time, higher unit capacity, more complete utilization of medium and more uniform water quality. Also called axial flow. Loop   A plumbing connection used to bypass water around a location designed for installation of a water treatment system or used when the treatment system is out of service for any reason. Back to top