text: Pipes, fittings, valves, and accessories make up a plastic pressure pipe system.  The range of pipe diameters for each pipe system does vary. However, the size ranges from  and . Pipes are extruded and are generally available in: , , , and  straight lengths and , , , and  coils for LDPE and HDPE.
  Pipe fittings are moulded and come in many sizes: tee 90° equal (straight and reducing), tee 45°, cross equal, elbow 90° (straight and reducing), elbow 45°, short radius bend 90° socket/coupler (straight and reducing), union, end caps, reducing bush, and stub, full face, and blanking flanges.
  Valves are moulded and also come in many types: ball valves (also multiport valve), butterfly valves, spring-, ball-, and swing-check non-return valves, diaphragm valves, knife gate valve, globe valves and pressure relief/reduction valves.
  Accessories are solvents, cleaners, glues, clips, backing rings, and gaskets.