$2.55
Irritec Perma-Loc hose fittings are a reliable and versatile way to connect to poly tubing. Based on a spin-lock design they provide easy installation, a reliable grip, and can be removed and reused if needed.
Use the 20 mm Barbed Coupling With Valve to insert a point in your 20 mm (.720 x .820) dripline where flow can be restricted or shut off. Tubing ID can range from .685" to .740".