Sagging Sewage Method Lines-- Dust variations can produce your drain line to sag. When this occurs, the portion that has sunk accumulates paper in addition to waste resulting in a blockage.Αν ο λογαριασμός νερού έχει αυξηθεί τους τελευταίους μήνες, χωρίς να έχετε αλλάξει τις σ