Ключевые слова: black plastic pipes, building, connection, construction, construction site, dig, drain, drain pipe, drainage, drainage pipe, drainage system, earthen trench, environment, flow, gravel road, gravel sidewalk, ground, house, industrial, industry, installation, laid, line, maintenance, pipe, pipeline, pipeline laid, piping, plastic, plumbing, pvc pipes, rain, rainwater pipe, repair, sewage, sewer, storm water, trench, tube, underground, underground drainage, underground pipe, water, work,