You can use .5" poly tubing to bring water to where you want to start your irrigation runs. The poly tubing serves as the main water supply and is used with the .5" fittings below. To connect Aquapore to poly, use barbed Aquapore fittings. To connect T-Tape to poly, use Loc Sleeve fittings. Not all .5"poly tubing is the same! Ours is 0.60 I.D./0.70 O.D.