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The Netafim FlexNet 3" coupling has an insert connection at each end for joining two lengths of 3" supply pipe. It extends a main or submain, or reconnects pipe after a damaged section has been removed.
The fitting insert slides inside the FlexNet pipe until the pipe reaches the shoulder. A rubber seal sits in a groove around the insert. An external metal clamp tightens around the pipe to compress the seal and secure the connection. The same assembly is used at both ends of the coupling.
Netafim FlexNet coupling with metal clamps