The most common problems with poor (slow) drain arise from the formation of blockages in the pipe when in one place a large number of locally accumulated nerastvorC‘nnogo substance.
Matatizo ya kawaida na maskini (kupunguza) kukimbia kutokea kutokana na malezi ya kuziba katika bomba wakati katika sehemu moja idadi kubwa ya ndani ya nchi kusanyiko nerastvorënnogo kulevya.