Barbed-to-Female-Thread Irrigation Adapter

This barbed-to-female-thread irrigation adapter connects a small irrigation tube to a matching male-thread outlet. One end inserts into the tubing; the other has a female-thread socket. It is available in four combinations of 16 or 20 mm tubing size with a 1/2 or 3/4 inch female connection.

Match both ends before ordering

Choose the tubing size and threaded connection as a pair. The four options are 16 mm x 1/2 inch female, 16 mm x 3/4 inch female, 20 mm x 1/2 inch female and 20 mm x 3/4 inch female. A matching thread size does not make a different tubing size interchangeable.

Measure the tubing and check its suitability for an insert barb. Confirm the male fitting's thread standard as well as its nominal size before assembly. BSP, NPT and garden-hose threads should not be assumed to match simply because they carry the same inch label.

Where this adapter fits

Use the adapter at a transition between a threaded irrigation component and a compatible small-diameter tube. This may be a branch connection or the start of a tubing run, provided the outlet and tubing match the selected option. The adapter makes a connection; it does not regulate pressure or shut off water.

Assemble and check the connection

1. Turn off the water and cut the tubing end square. Remove loose debris from both mating parts.
2. Check thread engagement without forcing it. Use a sealing method suitable for the actual thread connection and plastic fitting.
3. Push compatible tubing fully over the barb. Select any required tubing clamp to suit the tube and fitting.
4. Support the tubing so it does not pull sideways on the threaded joint.
5. Run the zone and inspect both ends for leakage and movement.

Common questions

Can I use this with any 16 mm tube?

Check the tube's actual dimensions and wall thickness. The barb must fit the inside of the tube securely without splitting it.

Which thread size should I choose?

Choose the female connection that matches the male outlet's size and thread standard. Check both before ordering.

Compare small tubing connections in drip fittings.