Ключевые слова:
Valves, Leak tests, Pipework systems, Water, Drainpipes, Water supply, Pipes, Drainage, Plastics, Testing conditions, Unplasticized polyvinyl chloride, Water supply (buildings), Sewerage, Polyvinyl chloride, Pressure, Sewers, Potable water, Pipe fittings, Pipe couplings, Hydraulic tests, Water supply and waste systems (building, Pressure pipes, Plastic pipelines