BS EN 16903. Plastics piping systems. Sustainability of construction works. Product Category Rules (PCR) for buried plastics piping systems Pressure pipes, Thermoplastic polymers, Polymers, Plastics, Pipe couplings, Pipe fittings, Pressure testing, Leak tests, Watertightness tests, Test equipment, Test specimens, Testing conditions, Adhesive-bonded joints, Pipes, Internal pressure