16 mm Lock-Nut Adapter with 3/4-Inch Female Thread

This lock-nut female-thread adapter joins a 16 mm drip line to a compatible 3/4-inch male-threaded component. The line end uses a retaining nut; the opposite end receives the male fitting. It provides a straight transition between two different connection types at an irrigation supply or branch point.

Identify the line end and female connection

The view shows the blue retaining nut around the line insert, the ribbed black center and the broad black female connection. These ends perform different jobs: seat the drip line on the insert, then connect the female side to the appropriate male fitting. Keep both connections accessible for inspection.

Connection details

• Line connection: 16 mm with a locking nut.
• Thread connection: 3/4-inch female.
• Arrangement: straight line-to-thread transition.

Choose and position the fitting

Confirm the male fitting size and thread standard before ordering. Thread sizes are nominal dimensions, so measuring the outside of a fitting is not enough to identify compatibility. Check the actual line fit and wall construction as well. Support adjacent fittings and the line so their weight does not strain the adapter.

Fit and inspect the joints

Turn off the supply and release trapped pressure. Keep the threaded surfaces clean, engage the mating fitting carefully and use the sealing method appropriate to the confirmed thread type. Avoid overtightening the plastic connection. Prepare a clean, square line end, seat it fully and secure the blue nut without damaging the line. Restore water gradually and inspect both joints for leaks.

Sold as one fitting. Line, mating components and installation accessories are separate.