What is the difference between ABS pipes and PVC pipes?

PVC and ABS pipes are made fro different plastic compounds. ABS is based around a styrene and so has a much better impact resistance. It is also good at low temperatures (down to -40 degrees C) whereas PVC gets very brittle even at zero degrees C. ABS and PVC have different properties regarding chemical compatibility so this should be checked. Both plastics are suitable for potable water as long as they are made to teh relevant spec. PVC pipe tends to be used more than ABS as it is cheaper. Our website www.plasticpipeshop.co.uk has more information.