Backflow Preventer
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Backflow preventer, TWS Valve
Werengani zambiriBackflow preventer makamaka amagwiritsidwa ntchito popereka madzi kuchokera kumatauni kupita ku zimbudzi wamba amachepetsa kuthamanga kwa mapaipi kuti madzi aziyenda njira imodzi yokha. Ntchito yake ndikuletsa kubwereranso kwa sing'anga yamapaipi kapena mkhalidwe uliwonse wa siphon kubwerera mmbuyo, kuti mupewe kuipitsa m'mbuyo.
