Joints and fittings for use with unplasticized PVC pressure pipes. Injection moulded unplasticized PVC fittings for solvent welding for use with pressure pipes, including potable water supply|Bonding, Type testing, Plastics, Statistical quality control, Sampling methods, Dimensions, Marking, Stress relieving, Deformation, Pipes, Solvent welding, Thermal testing, Unplasticized polyvinyl chloride, Pressure pipes, Opacity, Hydraulic tests, Visual inspection (testing), Determination of content, Injection moulding, Water testing, Pipe fittings, Acid-resistance tests, Chemical-resistance tests, Temperature, Polyvinyl chloride, Mechanical testing, Water, Materials in contact with food, Pipe couplings