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.
Homemade PVC kayak rack , can store 4 kayaks,paddles ,kayak car rack .made from 1.5" schedule 40 PVC 40"wide X 5' long (cost around $250 in 2015 prices) has 4 swiveling casters with two being lock kind ( otherwise rack will roll away when loading) . To make the wheel mounts I used 1 1/4" metal conduit cut to 2.5' long and weld a pre-drilled plate for the wheel . I bolted thru the PVC and conduit pipe to lock them together. The conduit helps reinforces the PVC when pushing the cart around .