They are mounted on a big panel board ( 4Ć¢ X 2Ć¢ ),they consist of Chlorine flow meter, primary filter and safety gauge on its top. Safety loop with nuts at both ends. Besides, there are plastic parts such as secondary filter with NRV.on top. Chlorine water mixing chamber and chlorine water solutioniser. In addition, there will be gas bend and water bend joining three PVC chambers and Teflon pipe connecting chlorine cylinder to the Chlorine flow meter. Liquefied chlorine drawn from a steel cylinder gets vaporized at normal room temperature and is led through Teflon connecting tube to the primary filter on the panel board which would arrest all possible cylinder impurities in gas so that they would not abstract the flow of gas through small apertures in the plant. Safety gauge on the primary filter will show pressure only in case of any blockage in any part of the plant. Flow meter will show the flow of chlorine in gms/hour. There will be PVC Ć¢UĆ¢ bend to convey gas from Primary filter to the secondary filter where the gas will be further screened to eliminate all impurities. There will be NRV on top of the secondary filter, hence only chlorine will pass onwards and prevent water to flow back in filter. Water introduced at bottom of the mixing chamber and gas come from top get mixed thoroughly and will flow by a water bend at top into the adjoining solutioniser. The solution will be again mixed thoroughly in the solutioniser and will be further passed gravity to the sump through the PVC outlet and pipe. Usually,one liter of water is required for every five grams of gas for making solution in mixing chamber.