What's the function of the water meter installing the soft joint? Do you have flanged connections or threaded connections?
For flanged and threaded connection, so the provisions of the water meter diameter less than or equal to 40mm is less than 40mm of the threaded connection, also called civil water meter water meter, water meter diameter greater than 50mm is greater than the flange connection, 50mm also called industrial water meter water meter
General water meter joint is iron joint or copper joint, I do not know the meaning of LZ, may be soft joint in order to play a sealing role, instead of rubber gasket, to prevent leakage of water meters.
