connection type: DN15/DN20
in a joined installation (10 mm distance) with no.10755000, no.10751000, no.10651000, no.28491000, no.40872000 or no.40873000 the use of basic set no.10971180 is recommended
in a freely arranged installation, basic sets no.16973180, no.16974180 or no.16970180 can also be used
noise class: II