This jetter propels a highly flexible hose through 1 1/4" to 4" (32 mm to 100 mm) lines Âblasting through sludge, soap and grease blockages. As you pull the hose back, it power scrubs the line, flushing debris away and restoring drain lines to their free-flowing capacity. 1 1/4" to 4" (32 mm to 100 mm) Drain Lines