Kev xaiv ntawm cov khoom siv rau lub hnab hauv qab vaj huam sib luag yog nyob ntawm lub hnab xav siv, qhov loj me, thiab qhov hnyav nws yuav dais. Piv txwv li, cov hnab tes loj feem ntau siv cov hlau hauv qab, thaum lub hnab me me yuav tau txais txiaj ntsig los ntawm polyethylene lossis PPR hauv qab. Cov ntaub ntawv no yooj yim dua los hloov thiab pheej yig dua.
Thaum muas high- lub hnab kawg, tshuaj xyuas cov qauv hauv qab thiab kev ua kom zoo thiab ua haujlwm zoo ntawm cov khoom siv. Qhov no yog tus yam ntxwv tseem ceeb ntawm cov hnab siab - kawg. Rau nruab nrab- mus rau qis- cov hnab kawg, cov khoom siv thiab cov khoom siv ntawm lub vaj huam sib luag hauv qab feem ntau tsis tshua muaj qhov tseem ceeb.
