BS EN ISO 1452-5. Plastics piping systems for water supply & for buried & above-ground drainage & sewerage under pressure. Unplasticized poly (vinyl chloride) (PVC-U). Part 5. Fitness for purpose of the system Plastics, Pipework systems, Pipes, Plastic pipelines, Unplasticized polyvinyl chloride, Polyvinyl chloride, Water, Water supply, Water supply (buildings), Water supply & waste systems (building, Sewerage, Drainage, Sewers, Drainpipes, Potable water, Pressure, Pressure pipes, Pipe fittings, Pipe couplings, Valves, Hydraulic tests, Leak tests, Testing conditions