Connect 13 mm LDPE drip supply pipe to 16 mm LDPE drip supply pipe
How to join 13 mm (about 1/2" nominal) and 16 mm (0.63" OD), and what stops it leaking.
Needs adapter
End A
13 mm LDPE drip supply pipe (13 mm (about 1/2" nominal))
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 needed13 mm to 16 mm drip reducer
Not a direct fit. Joining 13 mm LDPE drip supply pipe to 16 mm LDPE drip supply pipe needs a 13 mm to 16 mm drip reducer.
The part to buy
Search Amazon for 13 mm to 16 mm drip reduceraffiliate searchFind 13 mm to 16 mm drip reducer on eBayaffiliate
Inside one 13/16 mm garden kit the 13 mm branch and 16 mm main still need different fittings: a 13 mm barb will not grip 16 mm pipe and a 16 mm barb splits 13 mm pipe. A 13-to-16 mm reducing coupler joins the two sizes where a branch leaves the main.
Do not force a 16 mm fitting into 13 mm pipe to save a part. It looks like it seats, then blows off under pressure. Use the reducer.
Related connections
13 mm LDPE drip supply pipe13 mm (about 1/2" nominal)16 mm LDPE drip supply pipe16 mm (0.63" OD)16 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)adapter1/4 inch drip tubing to 16 mm LDPE drip supply pipeadapter
Sources: Drip fitting sizing and tubing compatibility, DripWorks · Barbed drip fitting sizing by tubing inner diameter, GardeningAsk