Choletsa Kubwerera M'mbuyo, Valavu ya TWS
-
Backflow preventer, TWS Vavu
Werengani zambiriCholetsa kubwerera kwa madzi chomwe chimagwiritsidwa ntchito makamaka popereka madzi kuchokera ku tawuni kupita ku zimbudzi wamba chimachepetsa kuthamanga kwa payipi kuti madzi ayende mbali imodzi yokha. Ntchito yake ndikuletsa kubwerera kwa madzi kuchokera ku payipi kapena vuto lililonse la siphon, kuti apewe kuipitsa kubwerera kwa madzi.
