Rafter Slip Tee1" - Aluminum This fittings Dimensions : 1" = 1.315 inch OD tubing. Inside diameter accepts 1" Schedule 40 Pipe. Outside diameter of this fitting is 1.75 inches. Sold each. Price(CAD): $11.60 per Each Smooth and bright finish aluminum with stainless steel lockscrew.
Watch out for that PVC!!! I use PEX lines in my garage but at one time used PVC. Read to many people's problems with the stuff. With the PEX fittings they snap right on and if you want to add on another section it's very easy. They are designed for home water lines and can handle high PSI's. A few highend air systems are sold using PEX tubes. They come in red and blue colors and the fittings work with copper or PVC with out any glue.