What is meant by series 1 and series 2 sizes for PVC pipe?
PVC pipe manufactured to AS 1477 is available in 2 size ranges referred to as Series 1 and Series 2. Series 1sizes are compatible with the ISO 161-1 and 161-2 standard size ranges. The Series 2 pipe is compatible with Australian cast iron sizes (AS2280) – this size range is unique to Australia. For the same nominal diameter (DN) the Series 2 pipes are slightly larger in diameter.