careful with the rubber adaptors..if they are going to be exposed to elements sun, hot and cold temp variations) they will go brittle and crack over time. i had one in my poolshed stuff and i ditched it. it was about 7 years old, had not been exposed to the sun but had temperature extremes.it was cracked and brittle as can be. i'm not sure that it wasn't the chlorine that might have caused it's condition more than anything.

regarding schedule 40 pvc. yep, most home depot stores will sell a variation of it.they may also call it electrical conduit and it'll be grey. i've used it for in a pinch fixes but use a lot of glue if you use it as it is not speced for use in watertight applications. it's meant to be used to contain electrical wire so the tolerances i've been told are not as strenous as the white pvc sched 40. it may also have different burst strength etc compared to the white. like i say, i've used it..i am using a few chunks of it and no problem except it definitely was not as water tight as the white and i had to use jb weld to seal the edges where i had some small leaks.