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Connect 1/4 inch drip tubing to 16 mm LDPE drip supply pipe

How to join 1/4" (0.170" ID x 0.250" OD) and 16 mm (0.63" OD), and what stops it leaking.

Needs adapter
End A
1/4 inch drip tubing (1/4" (0.170" ID x 0.250" OD))
Seals on the tube wall gripping the barb
via adapter
End B
16 mm LDPE drip supply pipe (16 mm (0.63" OD))
Seals on the tube wall gripping the barb
Adapter needed1/4 inch to 16 mm drip take-off

Not a direct fit. Joining 1/4 inch drip tubing to 16 mm LDPE drip supply pipe needs a 1/4 inch to 16 mm drip take-off.

The part to buy

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1/4 inch micro tubing branches off a 16 mm main through a barbed take-off that punches into the main pipe and presents a 1/4 inch barb. This is how individual drippers and misters tap the supply line without cutting it.

Use the correct hole punch, not a drill. An oversize hole in the 16 mm main will not seal around the take-off barb and weeps at every branch.

Related connections

1/4 inch drip tubing1/4" (0.170" ID x 0.250" OD)16 mm LDPE drip supply pipe16 mm (0.63" OD)4/7 mm micro drip tubing to 1/4 inch drip tubingadapter13 mm LDPE drip supply pipe to 16 mm LDPE drip supply pipeadapter16 mm LDPE drip supply pipe to 1/2 inch US drip tubingadapter16 mm LDPE drip supply pipe to 3/4" BSP parallel (G3/4 / BSPP)adapter

Sources: 1/4in polyethylene drip tubing 0.170in ID x 0.250in OD spec, Drip Depot · 1/4in barbed drip fittings for 0.140-0.170in ID tubing, DIG Corp · Drip fitting sizing and tubing compatibility, DripWorks · Barbed drip fitting sizing by tubing inner diameter, GardeningAsk