Ключевые слова:
Polyethylene, Pressure pipes, Potable water, Drainpipes, Pressure, Drainage, Fitness for purpose, Pipes, Plastic pipelines, Pipe couplings, Pipework systems, Sewerage, Plastics, Testing conditions, Pipe fittings, Water, Water supply, Water supply and waste systems (building, Valves, Sewers, Water supply (buildings)