Drain, waste and vent pipe as well as stormwater pipe and electrical conduit are typically produced using a multilayer construction, through the use of modern manufacturing technology. This technology incorporates a foamed layer in the core of the PVC pipe.
Modern manufacturing technology enables production of lighter weight PVC pipes than the traditional solid wall PVC pipes, reducing the weight of the pipe by up to 40%. This produces a more material efficient PVC pipe with significantly less embodied energy.
Recycled PVC is commonly used in the core of multilayer non-pressure pipes, further enhancing their environmental credentials.