Backflow venna,TWS Valve hmanga thil tih theih a ni
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Backflow venna,TWS Valve a ni
Chhiar belh rawhBackflow preventer hi khawpui unit atanga general sewage unit thlenga tui pekna atana hman ber a ni a, chutiang chuan tui luang chu kawng khat chauh a nih theih nan pipeline pressure kha khauh takin tihtlem a ni. A hnathawh chu pipeline medium emaw condition eng pawh siphon flow back emaw backflow ven a ni a, chu chu backflow pollution awm loh nan a ni.
