I have a council endorsed landscape plan The irrigation section makes reference: Install an in ground automatic class 12 polypipe drip emitter irrigation system I cannot identify a class 12 polypipe,,,,,,, is that the standard at Bunnings etc
It is the one with the blue line on it for pressures up to 1200 kpa, it sometimes has PN 1200 wrote on it . It is common at Bunnings . Class 10 has a yellow line.