5/3/2023 0 Comments National pool plant manual![]() ![]() ![]() The filter typically contains a medium such as graded sand (called '14/24 Filter Media' in the UK system of grading the size of sand by sifting through a fine brass-wire mesh of 14 to the inch (5.5 per centimeter) to 24 to the inch (9.5 per cm)). Chlorinated isocyanurates, a family of organic chlorine-releasing compounds, are stabilized to prevent UV degradation due to the presence of cyanurate as part of their chemical backbone.Ī pressure-fed sand filter is typically placed in line immediately after the water pump. To extend their disinfectant usefulness and persistence in outdoor settings, swimming pools treated with one or more of the inorganic forms of chlorine-releasing compounds can be supplemented with cyanuric acid-a granular stabilizing agent capable of extending the active chlorine residual half-life (t ½) by four to sixfold. ![]() Chlorine residuals from Cl 2 and inorganic chlorine-releasing compounds break down rapidly in sunlight. Inorganic forms of chlorine-releasing compounds frequently used in residential and public swimming pools include sodium hypochlorite commonly known as liquid bleach or simply bleach, calcium hypochlorite and lithium hypochlorite. The most basic of these compounds is molecular chlorine (Cl 2) however, its application is primarily in large commercial public swimming pools. Swimming pools can be disinfected with a variety of chlorine-releasing compounds. ![]()
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