Backflow Preventor
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Manag-amper na iyaagus, TWS Valve
Basaen so kaarumanSay backflow preventer ya manunan uusaren parad suplay na danum manlapud urban unit ya anggad general sewage unit et malet ya manlilimita ed pressure na pipeline pian say agos na danum et sakey a direksion labat. Say gagala to et pian naprebentaan so backflow na pipeline medium odino antokaman a kondisyon na siphon flow back, pian napaliisan so backflow pollution.
