Ключевые слова: bacteria, building, closeup, connection, construction, dirty, drain, drainage, ecological, ecology, environment, equipment, grey, home, house, improvement, industrial, industry, installation, maintenance, old, pipe, pipeline, pipework, piping, plastic, plumber, plumbing, pollution, refitting, renovation, repair, sanitary, sanitation, scrap, sedimentation, sewage, sewer, sewerage, smell, system, technology, tube, underground, unpleasant, waste, wastewater, water, white,