Type PN 16 only be used with PVC-U pipes with socket PN 16.
Type PN 10 must be used with all cast iron sockets, as the cast iron sockets
PN 10 and PN 16 are identical.
Features
Usable for pressure level PN 10 - PN 20 including test-pressure according to DVGW W400-2
No surface damages to the PVC-pipe
Also for PE-HD pipes